WO2012046598A1 - Tube céramique et son procédé de production - Google Patents

Tube céramique et son procédé de production Download PDF

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Publication number
WO2012046598A1
WO2012046598A1 PCT/JP2011/072113 JP2011072113W WO2012046598A1 WO 2012046598 A1 WO2012046598 A1 WO 2012046598A1 JP 2011072113 W JP2011072113 W JP 2011072113W WO 2012046598 A1 WO2012046598 A1 WO 2012046598A1
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WO
WIPO (PCT)
Prior art keywords
ceramic
capillary
tube
axis
molded body
Prior art date
Application number
PCT/JP2011/072113
Other languages
English (en)
Japanese (ja)
Inventor
宮澤杉夫
渡邊敬一郎
大橋玄章
Original Assignee
日本碍子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本碍子株式会社 filed Critical 日本碍子株式会社
Priority to JP2012537647A priority Critical patent/JPWO2012046598A1/ja
Priority to EP11830531.7A priority patent/EP2626889A4/fr
Priority to CN2011800481701A priority patent/CN103155092A/zh
Publication of WO2012046598A1 publication Critical patent/WO2012046598A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/002—Producing shaped prefabricated articles from the material assembled from preformed elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/302—Vessels; Containers characterised by the material of the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
    • H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J7/22—Tubulations therefor, e.g. for exhausting; Closures therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
    • H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/26—Sealing together parts of vessels
    • H01J9/265—Sealing together parts of vessels specially adapted for gas-discharge tubes or lamps
    • H01J9/266—Sealing together parts of vessels specially adapted for gas-discharge tubes or lamps specially adapted for gas-discharge lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
    • H01J9/395—Filling vessels

Definitions

  • the present invention relates to a method for producing a ceramic tube used for a high-intensity discharge lamp such as a high-pressure sodium lamp or a metal halide lamp, and a ceramic tube.
  • a ceramic metal halide lamp ionizes a metal halide with a pair of electrodes inserted in a ceramic tube for a high-intensity discharge lamp, thereby obtaining discharge light emission.
  • This type of ceramic tube has a pair of tubules formed so that each axis is positioned so as to face the light emitting portion. Each thin tube is provided with an electrode insertion hole, and an electrode is inserted through these electrode insertion holes.
  • Various types of ceramic tubes are disclosed, such as those produced by assembling a plurality of members, those produced integrally as a single member, and those produced by joining two members (for example, JP 63-143738, JP 5-334962, JP 7-21990, JP 8-55606, JP 2010-514125, JP 2010-514127, US (See Japanese Patent Application Publication No. 2006/0001346, JP-T 2009-530127, JP-A 2008-44344).
  • the electrode is inserted into one electrode insertion hole and sealed with frit glass or the like, and then the luminescent substance is introduced through the remaining electrode insertion hole.
  • an electrode is inserted into the other electrode insertion hole and sealed with frit glass or the like to assemble the luminous tube.
  • the third capillaries for introducing the luminescent substance into the luminescent container in order to introduce the luminescent substance after sealing the electrode or A structure is also known in which pores are provided separately from the thin tubes for inserting electrodes.
  • Japanese Patent Application Laid-Open No. 63-143738 discloses that both ends of an arc tube bulb made of translucent ceramic are sealed by solid-phase bonding with a closed body made of a conductive cermet that supports the electrodes.
  • Japanese Patent Laid-Open No. 5-334962 discloses that closed bodies are respectively attached to cylindrical openings at both ends of a translucent valve made of polycrystalline alumina, and holes through which electrodes pass respectively are provided at the central positions of the closed bodies.
  • An example is disclosed in which an opening for introducing a luminescent substance into a translucent bulb is formed at a position that is formed and decentered from the center of one closing member.
  • Japanese Patent Application Laid-Open No. 7-21990 discloses an example in which pin-shaped current conductors having a diameter of 300 ⁇ m are inserted into both ends of a discharge tube, and plugs at both ends are directly joined to both ends by sintering.
  • 3 and 4 show an example in which a filling hole having a diameter of 1 mm or more for introducing a luminescent substance into the discharge tube is formed in the wall portion of the discharge tube near the second end portion or the second plug. .
  • a small-diameter tube whose lower end is closed downward from the center portion of the funnel-shaped portion of the arc tube is integrally suspended to provide a lower portion in the small-diameter tube (during lighting).
  • the liquid metal halide that remains in the arc tube without being evaporated is stored in the coldest part: the coldest part).
  • one of the openings provided in the flange-shaped intermediate part that is removed from the coldest part is used as an inlet for sealing the metal halide and mercury in the arc tube, and the small-diameter pipe is used as the inlet pipe.
  • the inlet pipe There is a description that it can also be used.
  • one end of the discharge vessel and the wall of the tube are made as an integral part of the discharge vessel, and the other end of the discharge vessel is sealed with a ceramic end plug.
  • a ceramic burner is disclosed.
  • a tube is provided on the ceramic wall of the discharge vessel for introducing the ionized filler into the discharge vessel during the production of the ceramic burner and which projects outwardly from the ceramic wall of the discharge vessel. Examples have been disclosed.
  • the tube is hermetically sealed.
  • the discharge vessel is made, for example, substantially spherical or substantially elliptical by two different parts (separated by a broken line in FIG. 2A of the publication) Only a portion of one discharge vessel is provided with a tube for introducing an ionized filler into the discharge vessel during the production of the ceramic burner and protruding outward from the ceramic wall of the discharge vessel Examples have been disclosed.
  • the tube is hermetically sealed.
  • U.S. Patent Application Publication No. 2006/0001346 has a cylindrical portion and end members respectively coupled to both ends of the cylindrical portion, and inward of the cylindrical portion at the center of each end member.
  • An example in which an electrode extending in the direction is provided is disclosed, and in particular, one end member is provided with an introduction hole penetrating from the outer surface of the end member to the inner surface (the surface facing the inside of the tube portion). Yes.
  • the introduction of the metal halide or the like into the cylindrical portion is performed through the introduction hole, and then the introduction hole is sealed with a plug member.
  • a slurry can be applied to the joint surfaces of a plurality of inorganic powder compacts, and a plurality of compacts can be butted together to be integrated and sintered, whereby a strong joint sintered body can be obtained.
  • JP-T-2009-530127 structures capable of obtaining a bonded inorganic powder molded body while suppressing or avoiding deformation of the bonded portion and increase in surface roughness (for example, JP, 2008-44344, A).
  • JP-T-2009-530127 discloses a method for producing a sintered body suitable for use in an arc tube of a discharge lamp, containing an inorganic powder, an organic dispersion medium having a reactive functional group, and a gelling agent.
  • Japanese Patent Application Laid-Open No. 2008-44344 discloses a sintered body suitable for use in an arc tube of a discharge lamp, and a sintered body of a joined body of two or more inorganic powder molded bodies is used as two or more of the joined bodies.
  • the second component has a surface roughness equal to or less than that of the first component.
  • the second constituent part has a light transmission greater than that of the first constituent part in the vicinity of the width center thereof.
  • an electrode is provided in the light emitting portion.
  • a first capillary and a second capillary for introducing and sealing, and a third capillary (or third pore) for introducing a luminescent substance into the light emitting part are provided.
  • a first through hole, a second through hole, and a third through hole are formed in the first thin tube, the second thin tube, and the third thin tube, respectively, along the axial direction.
  • the axial direction of the first capillary tube and the second capillary tube is different from the axial direction of the third capillary tube (or the third pore). Therefore, when a molded body that is the basis of the ceramic tube is produced by a method such as injection molding or gel casting, a pin for forming the first through hole and the second through hole and the third through hole (or the third pore) ) Is different, the molding machine mechanism needs to be configured accordingly, and complicated and expensive manufacturing equipment is required. This causes an increase in manufacturing cost.
  • the part where the narrow tube and the pore are provided has a lower light transmittance than the other part, so if it is installed at a position corresponding to the discharge area between the electrode tips, the light transmittance deteriorates. However, this is not desirable because it causes a decrease in lamp efficiency and light distribution.
  • it if it is installed close to the first capillary or the second capillary for electrode sealing, it tends to be the coldest spot during lighting, and the luminescent material accumulates in the capillary and pores, causing corrosion of the ceramic part, This will cause a decrease in the service life.
  • a third tube having the same axial direction is separately provided in advance from the first tube or the second tube for electrode sealing.
  • the pores are located in the thick part near the electrode, causing corrosion due to the coldest spot. Therefore, it is not desirable.
  • the third thin tube is too long, the temperature does not rise during lighting and the coldest spot is reached, so that the ceramic part is corroded as described above, which is not desirable.
  • the present invention has been made in consideration of such a problem, and although it has third pores or third capillaries for introducing a luminescent substance in the light emitting part, it may lead to complicated manufacturing equipment.
  • the purpose of the present invention is to provide a ceramic tube for a high-intensity discharge lamp that can reduce the manufacturing cost, improve the productivity, and improve the reliability without affecting the light transmission. To do.
  • Another object of the present invention is to manufacture a ceramic tube having a third pore or a third capillary for introducing a luminescent substance into a light emitting part with a simple process and a simple manufacturing facility.
  • An object of the present invention is to provide a method for manufacturing a ceramic tube for a high-intensity discharge lamp, which can reduce manufacturing costs, improve productivity, and improve yield.
  • a ceramic tube includes a light emitting portion that emits light inside, and first and second capillaries for electrode sealing that are integrally formed on both sides of the light emitting portion.
  • a direction from the inside of the light emitting portion to the outside of the light emitting portion is a direction extending from the light emitting portion at a position near the first thin tube in the light emitting portion. It has the same through-hole.
  • the axis of the through hole and the axis of the first capillary are parallel.
  • the through hole is formed at a position closer to the first capillary than a position corresponding to an end portion of the electrode sealed by the first capillary in the light emitting portion. It is characterized by.
  • the through hole in the light emitting portion, has a distance between the axis of the through hole and the axis of the first capillary of 0.55 times the outer diameter of the first capillary. It is formed in the above position.
  • the light emitting portion is either a portion from the portion corresponding to the discharge region toward the first capillary tube, or a portion from the portion corresponding to the discharge region toward the second capillary tube.
  • One side is a curved surface, and the curved surface has the through hole.
  • a ceramic tube includes a light emitting portion that emits light inside, and a first capillary tube and a second capillary tube that are integrally formed on both sides of the light emitting portion, respectively.
  • the light emitting unit has a third capillary whose protruding direction is the same as the extending direction of the first capillary at a position near the first capillary. It has the hole penetrated from the front-end
  • the axis of the third tubule and the axis of the first tubule are parallel to each other.
  • the third tubule is formed at a position closer to the first tubule than a position corresponding to an end portion of the electrode sealed by the first tubule in the light emitting portion. It is characterized by being.
  • the distance between the axis of the third tubule and the axis of the first tubule is 0. 0 of the outer diameter of the first tubule. It is characterized by being formed at a position of 55 times or more.
  • the maximum length of the third capillary is from the base point to the first capillary. It is characterized in that it is 1/10 to 5/10 of the length along the axis of the first thin tube to the end of the first thin tube.
  • the light emitting portion is either a portion from the portion corresponding to the discharge region to the first capillary tube, or a portion from the portion corresponding to the discharge region to the second capillary tube.
  • One is a curved surface, and the curved surface has the third tubule.
  • a method for manufacturing a ceramic tube according to a third aspect of the present invention is the method for manufacturing a ceramic tube in which a plurality of ceramic molded bodies are joined to produce a ceramic tube for one high-intensity discharge lamp. And a first cylindrical part, and a first ceramic molded body having a through hole in the first curved part along the axial direction of the first cylindrical part, a second curved part and a second cylindrical part, Forming a second ceramic molded body integrally comprising: an end surface of the first curved portion of the first ceramic molded body; an end surface of the second curved portion of the second ceramic molded body; Forming a joined body by joining the first ceramic molded body, the axis of the first cylindrical portion and the axis of the through hole are parallel to each other.
  • a method for manufacturing a ceramic tube according to a fourth aspect of the present invention is the method for manufacturing a ceramic tube for manufacturing a ceramic tube for one high-intensity discharge lamp by joining a plurality of ceramic molded bodies. And the first cylindrical portion, and the first curved portion has a thin tube along the axial direction of the first cylindrical portion, and the hole penetrates from the tip of the thin tube into the first curved portion. Forming a first ceramic molded body, a second ceramic molded body integrally including a second curved portion and a second cylindrical portion, and the first curved portion of the first ceramic molded body.
  • the manufacturing facility is not complicated even though the ceramic tube according to the present invention has the third pore or the third capillary for introducing the luminescent substance in the light emitting portion.
  • the light transmission is not affected, and the manufacturing cost can be reduced, the productivity can be improved, and the reliability can be improved.
  • a ceramic tube having a third pore or a third thin tube for introducing a luminescent substance into the light emitting part is manufactured with a simple process and a simple manufacturing facility.
  • the manufacturing cost can be reduced, the productivity can be improved, and the yield can be improved.
  • FIG. 5A is a cross-sectional view showing a configuration of a casting mold (a fixed mold and a movable mold) for producing a ceramic tube according to a comparative example, FIG.
  • FIG. 5B is a cross-sectional view showing a state in which a pin is pulled out
  • 6A is a cross-sectional view showing a configuration of a casting mold (a fixed mold and a movable mold) for producing the first ceramic tube
  • FIG. 6B is a cross-sectional view showing a state in which the movable mold is pulled out.
  • It is a process block diagram showing the manufacturing method for producing the 1st ceramic tube.
  • FIG. 11A is a cross-sectional view illustrating a configuration of a casting mold (a fixed mold and a movable mold) for producing the second ceramic tube
  • FIG. 11B is a cross-sectional view illustrating a state in which the movable mold is pulled out.
  • a 2nd ceramic tube it is a principal part enlarged view for demonstrating the preferable angle of the protrusion direction of the 3rd thin tube with respect to the inner surface of a light emission part.
  • a 2nd ceramic tube it is sectional drawing for demonstrating the maximum length of a 3rd thin tube.
  • FIG. 10 It is a process block diagram showing a manufacturing method for producing the 2nd ceramic tube. It is a disassembled perspective view which shows the example of a combination of a 1st ceramic molded object and a 2nd ceramic molded object in the preparation process of a 2nd ceramic tube. It is sectional drawing which shows a 2nd conjugate
  • ⁇ in the numerical range is used as a meaning including numerical values described before and after the numerical value as a lower limit value and an upper limit value.
  • the ceramic tube is preferably used as an arc tube of a discharge lamp.
  • the high pressure discharge lamp can be applied to various lighting devices such as road lighting, store lighting, automobile headlamps, and liquid crystal projectors.
  • the arc tube includes an arc tube for a metal halide lamp and an arc tube for a high pressure sodium lamp.
  • the ceramic tube according to the first embodiment (hereinafter referred to as the first ceramic tube 10 ⁇ / b> A) is provided with a light emitting unit 12 that emits light inside and on both sides of the light emitting unit 12.
  • a light emitting unit 12 that emits light inside and on both sides of the light emitting unit 12.
  • Each has an electrode sealing first capillary 14a and a second capillary 14b that are integrally formed.
  • a through hole 16 is formed at a position near the first thin tube 14a so that the direction from the inside of the light emitting unit 12 to the outside of the light emitting unit 12 is the same as the extending direction of the first thin tube 14a.
  • the through-hole 16 is used as an introduction hole for introducing a luminescent substance or the like into the light emitting portion 12 in the process of manufacturing the first ceramic tube 10A as an arc tube, for example. Accordingly, the through hole 16 is sealed after the introduction of the luminescent substance or the like.
  • the inert start gas such as argon, mercury and a metal halide additive are enclosed in the light emitting unit 12. However, it is not always necessary to enclose mercury.
  • the first ceramic tube 10A includes a first ceramic molded body 22A in which a first curved portion 18a and a first cylindrical portion 20a are integrally formed, a second curved portion 18b, and a second cylindrical portion.
  • the second ceramic molded body 22B integrally formed with the portion 20b is joined and fired.
  • the first curved portion 18 a and the second curved portion 18 b are joined at the center portion to the bulging portion (light emitting portion 12) by firing and firing, and are integrally formed at both ends of the light emitting portion 12.
  • It has the shape which has the 1st thin tube 14a and the 2nd thin tube 14b, and the hollow part 24 connected from the 1st thin tube 14a to the 2nd thin tube 14b was formed in the inside.
  • the first electrode 26A and the second electrode 26B are inserted and sealed in the first capillary 14a and the second capillary 14b, respectively.
  • the first electrode 26A includes a first electrode shaft 28a, a first coil 30a wound around the tip of the first electrode shaft 28a, and a first lead 32a connected to the rear end of the first electrode shaft 28a by welding or the like.
  • the first lead 32a is sealed to the inner wall of the first capillary 14a, so that the first electrode 26A is sealed to the first capillary 14a as a whole.
  • the second electrode 26B is connected to the second electrode shaft 28b, the second coil 30b wound around the tip of the second electrode shaft 28b, and the rear end of the second electrode shaft 28b by welding or the like.
  • the second lead 32b is sealed by the inner wall of the second capillary 14b, whereby the second electrode 26B is sealed by the second capillary 14b as a whole.
  • a region between the first coil 30a and the second coil 30b is a discharge region 34 where light is emitted.
  • the light emitting section 12 is a first curved surface 36a whose diameter is continuously reduced from a portion corresponding to the discharge region 34 to a portion toward the first capillary 14a, and from the portion corresponding to the discharge region 34 to the second capillary 14b.
  • the second curved surface 36b has a diameter that continuously decreases toward the portion that faces.
  • the through-hole 16 is provided in the 1st curved surface 36a near the 1st thin tube 14a rather than the position corresponding to the edge part (front-end
  • the perpendicular line Ln (perpendicular line Ln and axial line n1) extends from the point 35 farthest from the axial line n1 of the first capillary 14a to the axial line n1.
  • the position on the axis n1 formed by drawing a perpendicular line) is Pa
  • the position of the tip of the first electrode 26A on the axis n1 is Pb
  • the direction toward the first capillary 14a based on the position Pb is the positive direction
  • the position Pa is preferably the same as the position Pb or in a positive direction with respect to the position Pb.
  • the above-described through hole 16 may be provided so that the axis m1 of the through hole 16 and the axis n1 of the first capillary 14a are orthogonal to each other. There are the following problems.
  • the first ceramic tube 10A is manufactured by joining and firing the first ceramic molded body 22A and the second ceramic molded body 22B.
  • the ceramic molded body 22A is produced by using, for example, a gel cast method, as shown in FIG. 5A, as a casting mold, a fixed mold 38 and a movable mold for molding the first curved portion 18a and the first cylindrical portion 20a.
  • a casting mold having the mold 40 and the pin 42 for forming the through hole 16 is required.
  • FIG. 5A a gel cast method
  • a system is required. This increases the complexity and size of the manufacturing equipment, and increases the manufacturing cost.
  • the through hole 16 is provided so that the axis m1 of the through hole 16 and the axis n1 of the first capillary 14a are parallel to each other. Does not occur. That is, as a first casting mold for producing the first ceramic molded body 22A, as shown in FIGS. 6A and 6B, a pin for forming the through hole 16 on the surface of the movable mold 40 facing the fixed mold 38. It is only necessary to provide 48 and provide the relief hole 50 into which the pin 48 is inserted in the fixed mold 38, and it is not necessary to make a significant design change. Moreover, when releasing the mold, it is only necessary to pull out the movable mold 40 as shown in FIG.
  • the through hole 16 is closer to the first capillary 14a than the position corresponding to the end of the first electrode 26A (the tip of the first coil 30a) in the light emitting unit 12. Since it is provided at a position, more preferably at a position closer to the first tubule 14a by 0.5 mm or more than the end of the first electrode 26A, the through-hole 16 does not affect the transmission of light, and the through-hole 16 It is possible to prevent deterioration in light emission efficiency and light distribution characteristics.
  • the distance La between the axis m1 of the through hole 16 and the axis n1 of the first capillary 14a is at a position that is 0.55 times or more the outer diameter Da of the first capillary 14a of the light emitting unit 12. It is preferable to provide the through hole 16. As a result, when the first ceramic tube 10A is used as the arc tube, it is avoided that the sealing portion of the through hole 16 becomes the coldest point during lighting, and corrosion of the sealing portion can also be prevented. .
  • the vicinity of the first thin tube 14a has a large heat capacity, so that it tends to be the coldest point during lighting, and the temperature tends to be low even when the coldest point is not reached.
  • the through hole 16 is provided in the vicinity, the light emitting material that does not vaporize during lighting and accumulates in the vicinity of the through hole 16 increases, and the progress of corrosion is accelerated. Therefore, it is desirable that the through hole 16 be provided at a position where the heat capacity is as small as possible and the temperature during lighting is relatively high, such as the portion of the first curved surface 36a.
  • the distance La exceeds 1.6 times the outer diameter of the first thin tube 14a of the light emitting part 12, cracks are likely to occur due to shrinkage due to solidification of the gelling agent at the time of molding. Preferably there is.
  • a first ceramic molded body 22A and a second ceramic molded body 22B are produced.
  • the first ceramic molded body 22A is formed with a through hole 52 that becomes the through hole 16 when the sintered body (the first ceramic tube 10A) is formed later. No through hole is formed in the second ceramic molded body 22B.
  • step S1a a ceramic powder, a dispersion medium, a gelling agent, and the like are mixed to prepare a gel casting slurry (referred to as a forming slurry).
  • step S1b the molding slurry is cast in the first casting mold for the first ceramic molded body 22A and in the second casting mold for the second ceramic molded body 22B, and then solidified.
  • the first casting mold 40 is provided with a pin 48 for forming the through hole 16
  • the fixed mold 38 is provided with a relief hole 50 into which the pin 48 is inserted. Is provided.
  • the second casting mold is not provided with the pin 48 or the escape hole 50 as described above.
  • step S1c the first casting mold and the second casting mold are released to obtain the first ceramic molded body 22A and the second ceramic molded body 22B as shown in FIG.
  • Both the first ceramic molded body 22A and the second ceramic molded body 22B are formed in a cylindrical shape having a hollow portion 54. More specifically, the first ceramic tube 10A (see FIG. 1), which is a finished product, has a similar shape in which the first ceramic tube 10A is separated into two at the longitudinal center of the axis p1. Of these, as shown in FIGS. 2 and 8, the first ceramic molded body 22A has a shape in which a first curved portion 18a (a bowl shape) and a first cylindrical portion 20a are integrally formed. A through hole 52 is formed in the first curved portion 18a, and the axis n2 of the first cylindrical portion 20a and the axis m2 of the through hole 52 are parallel to each other.
  • the second ceramic molded body 22B has a shape in which a second curved portion 18b (a bowl shape) and a second cylindrical portion 20b are integrally formed.
  • the joining surfaces 56a and 56b of the first ceramic molded body 22A and the second ceramic molded body 22B are located on the respective end surfaces of the first curved portion 18a and the second curved portion 18b, and the first ceramic molded body 22A and the second ceramic molded body. It is parallel to a plane orthogonal to the axial direction of the body 22B.
  • the outer peripheral portion and the inner peripheral portion of each joint surface 56a and 56b of the first ceramic molded body 22A and the second ceramic molded body 22B are chamfered (for example, R surface, C surface). Also good.
  • Step S2 of FIG. 7 the first ceramic molded body 22A and the second ceramic molded body 22B are bonded to produce a first bonded body 58A.
  • step S2a a ceramic powder, a solvent, a binder and the like are mixed to prepare a joining slurry (referred to as joining slurry 60: see FIG. 8).
  • step S2b for example, the bonding slurry 60 is applied (supplied) to the bonding surface 56a of the first ceramic molded body 22A.
  • step S2c the first bonded body 58A shown in FIG. 8 is obtained by pressure bonding together with the bonding surface 56b of the second ceramic molded body 22B.
  • the shape of the first bonded body 58A (see FIG. 8) obtained by bonding the first ceramic molded body 22A and the second ceramic molded body 22B, and the first obtained by firing the first bonded body 58A.
  • the shape of the ceramic tube 10A is similar, and the first ceramic tube 10A has a shape obtained by reducing the first joined body 58A.
  • step S3 of FIG. 7 the first joined body 58A is fired to obtain a sintered body (first ceramic tube 10A).
  • the through hole 52 along the axial direction of the first cylindrical portion 20a is formed in the first curved portion 18a of the first ceramic molded body 22A. 2
  • the light emitting unit 12 is located near the first thin tube 14a from the inside of the light emitting unit 12 to the outside of the light emitting unit 12.
  • the through-hole 16 whose direction toward the same direction as the extending direction of the first thin tube 14a can be easily formed.
  • the first ceramic tube 10A can be manufactured without increasing the complexity and size. That is, the first ceramic tube 10A having the through-hole 16 for introducing the luminescent substance or the like into the light emitting unit 12 can be manufactured with a simple process and a simple manufacturing facility, thereby reducing manufacturing costs and productivity. And yield can be improved.
  • a ceramic tube according to the second embodiment (hereinafter referred to as a second ceramic tube 10B) will be described with reference to FIGS.
  • the second ceramic tube 10B has substantially the same configuration as the first ceramic tube 10A described above, but, as shown in FIG. 9, the projection direction is the first light tube 12 at a position near the first thin tube 14a. It differs in that it has a third thin tube 70 that is the same as the extending direction of the one thin tube 14 a and has a hole (through hole 72) that penetrates from the tip of the third thin tube 70 to the inside of the light emitting unit 12.
  • the third thin tube 70 is used as an introduction hole for introducing a luminescent substance or the like into the light emitting part 12 in the process of manufacturing the second ceramic tube 10B as a light emitting tube, for example. Therefore, the through hole 72 of the third capillary 70 is sealed after the introduction of the luminescent substance or the like.
  • the third capillary 70 is a first curve closer to the first capillary 14 a than the position corresponding to the end of the first electrode 26 ⁇ / b> A (the tip of the first coil 30 a) in the light emitting unit 12. It is provided on the surface 36a.
  • the perpendicular line Ln (perpendicular line Ln and perpendicular line Ln) from the point 35 farthest from the axis line n1 of the first capillary 14a
  • the position on the axis n1 formed by drawing a perpendicular line perpendicular to the axis n1 is Pa
  • the position of the tip of the first electrode 26A on the axis n1 is Pb
  • the direction toward the first capillary 14a is based on the position Pb.
  • the position Pa is preferably the same as the position Pb or in the positive direction with respect to the position Pb.
  • the third capillary 70 is preferably provided so that the axis m3 of the third capillary 70 and the axis n1 of the first capillary 14a are parallel to each other.
  • a through hole 72 is formed on the surface of the movable mold 40 facing the fixed mold 38. It is only necessary to provide the pin 74 and provide the fixed mold 38 with a space 76 for forming the third thin tube 70 and a clearance hole 78 into which the pin 74 is inserted, and it is not necessary to make a significant design change, A dedicated mechanism or drive control system for independently controlling the drive of the pin 74 is not required. That is, only a mechanism and a drive control system for driving and controlling the reciprocating motion of the movable mold 40 are required, and the manufacturing facility is not complicated and enlarged.
  • the third capillary 70 is closer to the first capillary 14a than the position corresponding to the end of the first electrode 26A (the tip of the first coil 30a) in the light emitting unit 12. , More preferably 0.5 mm or more from the end of the first electrode 26A and closer to the first capillary 14a, so that the third capillary 70 does not affect the transmission of light, and the third It is possible to prevent deterioration in light emission efficiency and light distribution characteristics due to the thin tube 70.
  • the distance Lb between the axis m3 of the third thin tube 70 and the axis n1 of the first thin tube 14a is 0.55 times the outer diameter Da of the first thin tube 14a of the light emitting unit 12. Since the second ceramic tube 10B is used as the arc tube, it is avoided that the sealing portion of the through hole 72 in the third thin tube 70 becomes the coldest point during lighting when the second ceramic tube 10B is used as the arc tube. Further, corrosion of the sealing portion can be prevented. In the case of a structure like the second ceramic tube 10B, the vicinity of the first thin tube 14a has a large heat capacity, so that it tends to be the coldest point during lighting, and the temperature tends to be low even when it is not the coldest point.
  • the third tubule 70 When the third tubule 70 is provided in the vicinity, the heat capacity further increases and the temperature tends to decrease. Therefore, the luminescent substance does not evaporate during lighting and accumulates in the vicinity of the third tubule 70, and the corrosion progresses. Speeded up. Therefore, it is desirable that the third thin tube 70 be provided at a position where the heat capacity is as small as possible, such as the first curved surface 36a, and the temperature during lighting is relatively high.
  • the distance Lb exceeds 1.6 times the outer diameter of the first thin tube 14a of the light emitting part 12, cracks are likely to occur due to shrinkage due to solidification of the gelling agent at the time of molding. Preferably there is.
  • the contour 80 and the axis m3 in the contour 80 are shown.
  • the angle ⁇ formed by the direction of the tangent 84 at the intersection 82 with the axis m3 is preferably 30 ° or more.
  • an edge having a sharp cross section is formed at the boundary 86 between the through-hole 72 of the third thin tube 70 and the inner surface of the light emitting unit 12, and the edge during processing in the subsequent process or during transportation is obtained. This is because chipping easily occurs, and dust is easily generated and cracks are easily generated from the chipped portion. If the angle ⁇ formed is 30 ° or more, such inconvenience does not occur.
  • the maximum length Lc of the third capillary 70 is from the base point 88. It is preferable that the length is 1/10 to 5/10 of the length Ld along the axis n1 to the end of the one thin tube 14a. If the maximum length Lc of the third thin tube 70 is too short, it is difficult to seal the through hole 72 of the third thin tube 70, and if the maximum length Lc of the third thin tube 70 is too long, deformation occurs during firing. This is because it tends to occur, and since it tends to become the coldest spot when it is lit, there is a possibility that corrosion is likely to occur.
  • a first ceramic molded body 22A and a second ceramic molded body 22B are produced.
  • the first ceramic molded body 22A is formed with a third cylindrical portion 90 and a through hole 92 that become the third thin tube 70 and the through hole 72 when the sintered body (second ceramic tube 10B) is formed later.
  • the third cylindrical portion 90 and the through hole 92 are not formed in the second ceramic molded body 22B.
  • step S101a in FIG. 14 After mixing a ceramic powder, a dispersion medium, a gelling agent and the like to prepare a molding slurry (step S101a in FIG. 14), the molding slurry is made into a first casting mold (see FIG. 11A) and a second casting. Cast into a mold (not shown) (step S101b) and solidify. Thereafter, the first casting mold and the second casting mold are released (step S101c) to obtain the first ceramic molded body 22A and the second ceramic molded body 22B shown in FIG.
  • the first ceramic molded body 22A has a shape in which a first curved portion 18a (a bowl shape) and a first cylindrical portion 20a are integrally formed. Is formed with a third cylindrical portion 90 projecting in the same direction as the projecting direction of the first cylindrical portion 20a, and a through hole 92 penetrating from the end of the third cylindrical portion 90 to the inside of the first curved portion 18a, The axis n2 of the first cylindrical portion 20a and the axis m4 of the third cylindrical portion are parallel.
  • the second ceramic molded body 22B has a shape in which the second curved portion 18b (a bowl shape) and the second cylindrical portion 20b are integrally formed.
  • step S102 of FIG. 14 the first ceramic molded body 22A and the second ceramic molded body 22B are bonded to produce a second bonded body 58B shown in FIG. Specifically, after mixing ceramic powder, a solvent, a binder, and the like to prepare the bonding slurry 60 (step S102a), for example, the bonding slurry 60 is applied (supplied) to the bonding surface 56a of the first ceramic molded body 22A ( Step S102b). Then, the 2nd joined body 58B shown in FIG. 16 is obtained by crimping together with the joining surface 56b of the 2nd ceramic molded object 22B.
  • step S103 of FIG. 14 the second joined body 58B is fired to obtain a sintered body (second ceramic tube 10B).
  • the third cylindrical portion 90 along the axial direction of the first cylindrical portion 20a is formed on the first curved portion 18a of the first ceramic molded body 22A.
  • the light emitting part 12 is located from the inside of the light emitting part 12 at a position near the first thin tube 14a in the light emitting part 12. It is possible to easily form the third capillary 70 whose direction toward the outside is the same as the extending direction of the first capillary 14a.
  • the second ceramic tube 10B can be manufactured without increasing the complexity and size of the manufacturing equipment. That is, the second ceramic tube 10B having the third thin tube 70 and the through hole 72 for introducing the light emitting substance or the like into the light emitting unit 12 can be manufactured with a simple process and a simple manufacturing facility, and the manufacturing cost Reduction, productivity improvement, and yield improvement.
  • first ceramic molded body 22A and the second ceramic molded body 22B are not distinguished from each other, they are simply referred to as “ceramic molded body 22”, and the above-described joining surface 56a and the joining surface 56b are not distinguished from each other. Is simply referred to as “joint surface 56”.
  • the ceramic molded body 22 is prepared.
  • Various methods are conventionally known for producing the ceramic molded body 22 and can be easily obtained using such methods.
  • a manufacturing method of the ceramic molded body 22 for example, a molding slurry containing an inorganic powder and an organic compound is cast into a casting mold and solidified by a chemical reaction between organic compounds, for example, a chemical reaction between a dispersion medium and a gelling agent or a gelling agent. Then, it can be prepared by a gel casting method for releasing the mold.
  • Such a forming slurry contains a dispersion medium and a gelling agent in addition to the raw material powder, and may contain a dispersing agent and a catalyst for adjusting viscosity and solidification reaction.
  • a dispersing agent and a catalyst for adjusting viscosity and solidification reaction may contain a dispersing agent and a catalyst for adjusting viscosity and solidification reaction.
  • Ceramic powder examples of the ceramic powder contained in the ceramic molded body 22 include alumina, aluminum nitride, zirconia, YAG, and a mixture of two or more thereof.
  • the sintering aid for improving the sinterability and characteristics include magnesium oxide, and ZrO 2 , Y 2 O 3 , La 2 O 3 and Sc 2 O 3 are preferable.
  • Dispersion medium As the dispersion medium, it is preferable to use a reactive dispersion medium.
  • a reactive dispersion medium For example, it is preferable to use an organic dispersion medium having a reactive functional group.
  • the organic dispersion medium having a reactive functional group can be chemically bonded to a gelling agent described later, that is, a liquid substance capable of solidifying the molding slurry, and can form a highly fluid molding slurry that can be easily cast. It is preferable to satisfy the two conditions of being either a liquid substance.
  • a reactive functional group that is, a functional group capable of forming a chemical bond with the gelling agent such as a hydroxyl group, a carboxyl group, or an amino group is included in the molecule. It is preferable to have.
  • an organic dispersion medium having a viscosity as low as possible in order to form a molding slurry having high fluidity that is easy to cast, it is preferable to use an organic dispersion medium having a viscosity as low as possible, and in particular, a substance having a viscosity at 20 ° C. of 20 cps or less is used. It is preferable.
  • polyhydric alcohol and polybasic acid for strength reinforcement as long as they do not greatly thicken the molding slurry.
  • the gelling agent reacts with the reactive functional group contained in the dispersion medium to cause a solidification reaction, and those exemplified below can also be used.
  • the gelling agent preferably has a viscosity at a temperature of 20 ° C. of 3000 cps or less, and the reactive functional group of the gelling agent is a highly reactive isocyanate group (—N ⁇ C ⁇ O) and / or isothiocyanate. It is preferable to select a gelling agent having a nate group (—N ⁇ C ⁇ S).
  • Examples of the gelling agent having an isocyanate group and / or an isothiocyanate group include MDI (4,4′-diphenylmethane diisocyanate) isocyanate (resin) and HDI (hexamethylene diisocyanate) isocyanate.
  • MDI 4,4′-diphenylmethane diisocyanate
  • HDI hexamethylene diisocyanate
  • Resin TDI (tolylene diisocyanate) -based isocyanate (resin)
  • IPDI isophorone diisocyanate
  • isothiocyanate isothiocyanate
  • These gelling agents are shrunk due to the condensation reaction of the resin during solidification, and in particular have a first capillary tube 14a and a third capillary tube 70 like the first ceramic molded body 22A of the second ceramic tube 10B.
  • a force that tears between the first thin tube 14a and the third thin tube 70 is applied due to the shrinkage, and cracks are likely to occur.
  • it is more preferable to use MDI isocyanate because drying shrinkage can be reduced (3% or less).
  • the molding slurry for producing the ceramic molded body 22 can be exemplified by the contents described in Japanese Patent Application Laid-Open No. 2008-44344 and International Publication No. WO2002 / 085590, and is prepared, for example, as follows. be able to. First, the raw material powder is dispersed in a dispersion medium to form a molding slurry, and then a gelling agent is added, or the raw material powder and the gelling agent are simultaneously added to the dispersion medium and dispersed to form a molding slurry. it can. Considering workability at the time of casting or the like, the viscosity of the molding slurry at a temperature of 20 ° C.
  • the viscosity of the molding slurry is adjusted not only by the viscosity of the reactive dispersion medium or gelling agent described above, but also by the type of powder, the amount of the dispersing agent, and the concentration of the molding slurry (powder volume% with respect to the total volume of the molding slurry). be able to.
  • the concentration of the molding slurry is usually preferably 25 to 75% by volume, and more preferably 35 to 75% by volume in consideration of reducing cracks due to drying shrinkage.
  • a bonding slurry 60 for bonding the ceramic molded bodies 22 to each other is prepared.
  • the joining slurry 60 is preferably a non-self-curing slurry that does not solidify due to a chemical reaction.
  • a non-self-curing slurry it is possible to easily maintain the state in which the surface tension is applied, thereby obtaining a joint portion (after drying and after sintering) having a small surface roughness by the action of the surface tension. be able to.
  • the layer of the bonding slurry 60 is formed in a state where the surface tension is applied, the shape of the layer of the bonding slurry 60 is easily controlled, and the cross-sectional shape of the finally obtained bonded portion (after sintering) is controlled. become able to.
  • various binders such as polyvinyl acetal resin and ethyl cellulose can be used in addition to the raw material powder and non-reactive dispersion medium that can be used for the molding slurry already described.
  • a dispersant such as DOP (bis (2-ethylhexyl phthalate)) or an organic solvent such as acetone or isopropanol for adjusting the viscosity at the time of mixing can be used as appropriate.
  • the joining slurry 60 can be obtained by mixing the raw material powder, the solvent, and the binder using a normal ceramic paste using a tri-roll mill, a pot mill, or the like, or a slurry manufacturing method.
  • a dispersant and an organic solvent can be appropriately mixed.
  • butyl carbitol, butyl carbitol acetate, terpineol, or the like can be used.
  • a known method such as a dispenser, screen printing, or metal mask printing can be used.
  • the bonding slurry 60 is supplied between the bonding surfaces 56 of the ceramic molded body 22 or to the bonding surfaces 56, and then dried. What is necessary is just to hold
  • the distance between the bonding surfaces 56 of the ceramic molded body 22 is adjusted, changed, vibrated, rotated, or bonded.
  • the shape of the layer of the bonding slurry 60 can be adjusted by relatively moving the ceramic molded body 22 in the substantially horizontal direction.
  • it is possible to easily control the shape of the layer of the bonding slurry 60 by ensuring the degree of the load applied in the direction orthogonal to the bonding surface 56 and / or the distance between the bonding surfaces 56, and there is no defect such as bubbles.
  • a sintered body (ceramic tube) can be obtained.
  • drying process When the layer of the bonding slurry 60 is formed between the bonding surfaces 56 of the ceramic molded body 22 arranged to face each other, the layer of the bonding slurry 60 is dried.
  • the drying process can be appropriately set according to the composition, supply amount, and the like of the bonding slurry 60. Usually, it can be carried out at a temperature of 40 ° C. or more and 200 ° C. or less for about 5 to 120 minutes.
  • the joined body thus obtained is in a state where at least two ceramic molded bodies 22 are joined by a joined portion (after drying) in which the layer of the joining slurry 60 is dried.
  • a joined portion after drying
  • the layer of the joining slurry 60 is dried.
  • the present invention is not limited to this, and three or more ceramic molded bodies 22 can be joined simultaneously or sequentially.
  • a layer of slurry 60 may be formed and bonded to obtain a bonded body.
  • the joined body is fired to sinter the sinterable component in the ceramic molded body 22 and the joined portion (after drying) to obtain a sintered body.
  • the joined body Prior to the sintering step, the joined body can be degreased or calcined.
  • Example 1 Based on the manufacturing method shown in FIG. 7, ten first ceramic tubes 10A shown in FIG. 1 were produced.
  • a molding slurry for producing the first ceramic molded body 22A and the second ceramic molded body 22B was prepared as follows. That is, 100 parts by weight of alumina powder as a raw material powder and 0.025 part by weight of magnesia, 30 parts by weight of a polybasic acid ester as a dispersion medium, 4 parts by weight of MDI resin as a gelling agent, 2 parts by weight of a dispersant, 0. Two parts by weight were mixed to form a molding slurry.
  • the molding slurry was poured into a first casting mold (see FIG. 6A) and a second casting mold (not shown) made of aluminum alloy at room temperature, left at room temperature for 1 hour, solidified, and then released. Furthermore, it was left at room temperature and then at a temperature of 90 ° C. for 2 hours to obtain 10 first ceramic molded bodies 22A and 10 second ceramic molded bodies 22B.
  • the chamfering for example, the R surface
  • the chamfering for example, the R surface of the outer peripheral portion and the inner peripheral portion of each joining surface 56a and 56b of the first ceramic molded body 22A and the second ceramic molded body 22B is performed within a radius of 0.05 to 0.15 mm. did.
  • the joining slurry 60 was prepared as follows. That is, 100 parts by weight of alumina powder, 0.025 part by weight of magnesia, 100 parts by weight of terpineol, 30 parts by weight of butyl carbitol, and 8 parts by weight of polyvinyl acetal resin were mixed as a raw material powder to form a joining slurry 60.
  • a screen plate making having an emulsion thickness of 100 ⁇ m and # 290 mesh and having a ring-shaped pattern (inner diameter 12.8 mm, outer diameter 13.7 mm) corresponding to the joining surface 56a of the first ceramic molded body 22A.
  • the screen plate making is fixed to the stage of the screen printing machine so as to be parallel to the joining surface 56a (inner diameter 12.5 mm, outer diameter 14.0 mm) of the first ceramic molded body 22A, and alignment with the screen plate making is performed. did.
  • the prepared bonding slurry 60 was supplied to the bonding surface 56a of the first ceramic molded body 22A by a screen printing machine using screen plate making.
  • the bonding surface 56a of the first ceramic molded body 22A and the bonding surface 56b of the second ceramic molded body 22B are pressure-bonded and dried for 15 minutes in a dryer at a temperature of 95 ° C., and the through holes 52 are respectively formed in the first curved portions 18a.
  • Ten first joined bodies 58 ⁇ / b> A (see FIG. 8) in which were formed.
  • the direction from the inside of the light emitting unit 12 toward the outside of the light emitting unit 12 in the light emitting unit 12 near the first thin tube 14 a is the extending direction of the first thin tube 14 a.
  • a sintered body (first ceramic tube 10B) having the same through hole 16, the outer diameter of the light emitting portion 12 being 11 mm, and the lengths of the first and second thin tubes being 17 mm was obtained.
  • the through hole 16 was formed such that the position Pa was 0.5 mm in the positive direction from the position Pb.
  • Example 2 Based on the manufacturing method shown in FIG. 14, ten sintered bodies (second ceramic tube 10B) according to Example 2 shown in FIG. 9 were produced.
  • a molding slurry was prepared in the same manner as in Example 1 described above, and this molding slurry was cast into a first casting mold (see FIG. 11A) and a second casting mold (not shown) made of aluminum alloy at room temperature. Then, it was left at room temperature for 1 hour, solidified and then released. Furthermore, it was left at room temperature and then at a temperature of 90 ° C. for 2 hours to obtain 10 first ceramic molded bodies 22A and 10 second ceramic molded bodies 22B.
  • the chamfering (for example, the R surface) of the joint surfaces 56a and 56b of the first ceramic molded body 22A and the second ceramic molded body 22B with respect to the outer peripheral portion and the inner peripheral portion is in the range of a radius of 0.05 to 0.15 mm. It carried out in.
  • the joining slurry 60 was prepared in the same manner as in Example 1 described above, and the prepared joining slurry 60 was supplied to the joining surface 56a of the first ceramic molded body 22A using a screen printing machine with a screen printing machine.
  • the screen plate making was the same as in Example 1.
  • the bonding surface 56a of the first ceramic molded body 22A and the bonding surface 56b of the second ceramic molded body 22B are pressure-bonded and dried for 15 minutes with a dryer at a temperature of 95 ° C., and the third cylinder is formed on the first curved portion 18a.
  • Ten second joined bodies 58B (see FIG. 16) in which the portion 90 and the through hole 92 were formed were produced.
  • the second joined body 58B produced as described above was preliminarily fired and fired in the same manner as in Example 1 to be densified and translucent.
  • the outer diameter of the light emitting part 12 is 11 mm
  • the lengths of the first capillary 14 a and the second capillary 14 b are 17 mm
  • the light emitting part 12 is positioned closer to the first capillary 14 a.
  • the third capillary 70 has a protruding direction that is the same as the extending direction of the first capillary 14 a, and has a hole (through hole 72) penetrating from the tip of the third capillary 70 to the inside of the light emitting unit 12.
  • a second ceramic tube 10B was obtained.
  • Example 2 None of the ten obtained sintered bodies according to Example 2 were found to be cracked or deformed.
  • each sintered body did not generate cracks even at a temperature of 150 ° C., and was at the same level as the arc tube having the same shape without the third capillary 70.
  • the amount of leak was measured with a He leak measuring machine, and all of them were 1 ⁇ 10 ⁇ 8 atm ⁇ cc / sec or less.
  • the third thin tube 70 and the through hole 72 do not affect the light transmission when used as an arc tube. This was measured by measuring the actual brightness, and whether or not the measured value was 98% or more of the designed brightness (design value), was 99.5% in Example 2.
  • Comparative Example 1 Ten sintered bodies according to Comparative Example 1 were produced. First, a molding slurry was prepared in the same manner as in Example 1 described above, and this molding slurry was poured into a second casting mold made of aluminum alloy at room temperature, left at room temperature for 1 hour, solidified, and then released. did. Furthermore, it was left to stand at room temperature and then at a temperature of 90 ° C. for 2 hours to obtain 20 second ceramic molded bodies 22B. Next, each of the second curved portions 18b of the second ceramic molded body 22B was drilled with a drill to provide a through hole having a diameter of 0.3 mm.
  • the joining slurry 60 was prepared in the same manner as in Example 1 described above, and the prepared joining slurry 60 was applied to the joining surface 56b of one second ceramic molded body 22B with a screen printing machine using a screen plate making. Supplied. And each joined surface 56b of a pair of 2nd ceramic molded object 22B was crimped
  • Comparative Example 2 Ten sintered bodies according to Comparative Example 2 were produced. First, in the same manner as in Comparative Example 1, 20 second ceramic molded bodies 22B were obtained. Next, each second curved portion 18b of one second ceramic molded body 22B was drilled with, for example, a drill to provide a through hole having a diameter of 0.9 mm.
  • Comparative Example 3 In the same manner as in Example 1, ten sintered bodies (ceramic tubes) according to Comparative Example 3 shown in FIG. 17 were produced.
  • the third capillary 70 is provided in the light emitting unit 12 so that the axis m3 of the third capillary and the axis n1 of the first capillary 14a are orthogonal to each other.
  • the maximum length of the third capillary 70 was 9 mm.
  • the ten sintered bodies obtained were bent during the sintering process of the third thin tube 70, and the luminescent material could not be introduced into the light emitting part 12 during the process of manufacturing the arc tube.
  • Example 11 Ten sintered bodies according to Example 11 were produced in the same manner as Example 1 described above.
  • Example 12 Ten sintered bodies according to Example 12 were produced in the same manner as Example 2 described above. Except that the distance La is 0.7 times the outer diameter Da of the first thin tube of the light emitting unit 12, it is the same as the sintered body according to Example 1.
  • Example 13 Ten sintered bodies according to Example 13 were produced in the same manner as Example 2 described above. Except that the distance La is 0.85 times the outer diameter Da of the first thin tube of the light emitting unit 12, it is the same as the sintered body according to Example 1.
  • Example 14 Ten sintered bodies according to Example 14 were produced in the same manner as Example 2 described above.
  • Example 15 Ten sintered bodies according to Example 15 were produced in the same manner as Example 2 described above.
  • the distance Lb is the same as that of the sintered body according to Example 2, except that the distance Lb is 0.7 times the outer diameter Da of the first thin tube of the light emitting unit 12.
  • Example 16 Ten sintered bodies according to Example 16 were produced in the same manner as Example 2 described above.
  • the distance Lb is the same as that of the sintered body according to Example 2 except that the distance Lb is 0.85 times the outer diameter Da of the first capillary of the light emitting unit 12.
  • Reference Example 1 Ten sintered bodies according to Reference Example 1 were produced in the same manner as Example 1 described above. Except that the distance La is set to 0.5 times the outer diameter Da of the first thin tube of the light emitting unit 12, it is the same as that of the sintered body according to Example 1.
  • Reference Example 2 Ten sintered bodies according to Reference Example 2 were produced in the same manner as Example 1 described above. Except that the distance La is set to 0.4 times the outer diameter Da of the first thin tube of the light emitting unit 12, it is the same as the sintered body according to the first embodiment.
  • Reference Example 3 Ten sintered bodies according to Reference Example 3 were produced in the same manner as Example 2 described above.
  • the distance Lb is the same as that of the sintered body according to Example 2, except that the distance Lb is 0.5 times the outer diameter Da of the first capillary of the light emitting unit 12.
  • Reference Example 4 Ten sintered bodies according to Reference Example 4 were produced in the same manner as in Example 2 described above.
  • the distance Lb is the same as that of the sintered body according to Example 2, except that the distance Lb is set to 0.4 times the outer diameter Da of the first thin tube of the light emitting unit 12.
  • each arc tube is manufactured using the obtained sintered body, and a continuous lighting test is performed on each arc tube. From the lighting start time to the time when the brightness decreases to 80% at the start of lighting. Time (effective time to function as a lamp) was measured.
  • Example 11 was set to h (hours), and the ratios of Examples 12 to 16 and Reference Examples 1 to 4 were observed.
  • Examples 12 to 16 have a long effective time and a long life, based on Example 11.
  • the effective times of Reference Examples 1 to 4 are shorter than those of Example 11. This is considered that the sealing part of the through-hole 16 or the through-hole 72 became the coldest point during lighting, and corrosion of the sealing part progressed. Therefore, in the light emitting unit 12, the distance La between the axis m1 of the through hole 16 and the axis n1 of the first capillary 14a, or the distance Lb between the axis m3 of the third capillary 70 and the axis n1 of the first capillary 14a is light emission. It turns out that it is preferable to provide the through-hole 16 or the 3rd thin tube 70 in the position of 0.55 times or more of the outer diameter Da of the 1st thin tube of the part 12.
  • Example 21 Ten sintered bodies according to Example 21 were produced in the same manner as Example 2 described above. Sintering according to Example 2 except that the angle ⁇ between the direction of the tangent 84 at the intersection 82 between the contour 80 and the axis m3 and the axis m3 is set to 30 ° by adjusting the shape of the curved surface. Same as body.
  • Example 22 Ten sintered bodies according to Example 22 were produced in the same manner as Example 2 described above.
  • the sintered body according to Example 2 is the same as the sintered body except that the angle ⁇ formed is 35 °.
  • Example 23 Ten sintered bodies according to Example 22 were produced in the same manner as Example 2 described above.
  • the sintered body according to Example 2 is the same as the sintered body according to Example 2 except that the angle ⁇ formed is 45 °.
  • Reference Example 11 Ten sintered bodies according to Reference Example 11 were produced in the same manner as in Example 2 described above.
  • the sintered body according to Example 2 is the same as the sintered body except that the angle ⁇ formed is 20 °.
  • Reference Example 12 Ten sintered bodies according to Reference Example 11 were produced in the same manner as in Example 2 described above.
  • the sintered body according to Example 2 is the same as the sintered body except that the angle ⁇ formed is 25 °.
  • Example 31 Ten sintered bodies according to Example 31 were produced in the same manner as Example 2 described above.
  • Example 32 Ten sintered bodies according to Example 32 were produced in the same manner as Example 2 described above.
  • the third thin tube 70 is the same as the sintered body according to the example 2 except that the maximum length Lc is set to 2/10 of the length Ld.
  • Example 33 Ten sintered bodies according to Example 33 were produced in the same manner as Example 2 described above.
  • the third thin tube 70 is the same as the sintered body according to the example 2 except that the maximum length Lc is set to 3/10 of the length Ld.
  • Example 34 Ten sintered bodies according to Example 34 were produced in the same manner as Example 2 described above.
  • the third thin tube 70 is the same as the sintered body according to Example 2, except that the maximum length Lc is 4/10 of the length Ld.
  • Example 35 Ten sintered bodies according to Example 35 were produced in the same manner as Example 2 described above.
  • the third thin tube 70 is the same as the sintered body according to Example 2 except that the maximum length Lc is set to 5/10 of the length Ld.
  • Reference Example 21 Ten sintered bodies according to Reference Example 21 were produced in the same manner as in Example 2 described above. Except that the maximum length Lc of the third thin tube 70 is set to 0.5 / 10 of the length Ld, it is the same as the sintered body according to the second embodiment.
  • Example 35 the effective time of Example 35 is h (hours)
  • the ratios of Examples 31 to 34 and Reference Examples 21 and 22 were observed.
  • Examples 31 to 34 have a long effective time and a long life, based on Example 35.
  • the effective time of the reference example 22 is shorter than that of the example 35. This is considered that the sealing part of the through-hole 16 or the through-hole 72 became the coldest point during lighting, and corrosion of the sealing part progressed.
  • Reference Example 21 it was difficult to seal the through hole, and as a result, leakage occurred in the initial stage of the life test.
  • the maximum length Lc of the third capillary 70 be 1/10 to 5/10 of the length Ld along the axis n1 from the base point 88 to the end of the first capillary 14a. Recognize.
  • Example 41 Ten sintered bodies according to Example 41 were produced in the same manner as Example 1 described above. As shown in FIG. 3, among the openings of the through holes 16 in the light emitting section 12, the position on the axis n1 formed by drawing a perpendicular Ln from the point 35 farthest from the axis n1 of the first capillary 14a to the axis n1.
  • the position Pa when the position of the tip of the first electrode 26A on the axis n1 is Pb, the direction toward the first capillary 14a with respect to the position Pb as the positive direction, and the direction toward the second capillary 14b as the negative direction, the position Pa Is the same as the sintered body according to Example 1 except that the through hole 16 is formed so as to be the same as the position Pb.
  • Example 42 Ten sintered bodies according to Example 42 were produced in the same manner as Example 1 described above. Similar to Example 1, the through hole 16 was formed so that the position Pa was 0.5 mm in the forward direction from the position Pb.
  • Example 43 Ten sintered bodies according to Example 43 were produced in the same manner as Example 1 described above. Except that the through hole 16 is formed so that the position Pa is 2 mm in the forward direction from the position Pb, it is the same as the sintered body according to the first embodiment.
  • Reference Example 21 Ten sintered bodies according to Reference Example 21 were produced in the same manner as in Example 1 described above. Except that the through hole 16 is formed so that the position Pa is 0.5 mm in the negative direction from the position Pb, it is the same as the sintered body according to the first embodiment.
  • Reference Example 22 Ten sintered bodies according to Reference Example 22 were produced in the same manner as in Example 1 described above. Except that the through hole 16 is formed so that the position Pa is 2 mm in the negative direction from the position Pb, it is the same as the sintered body according to the first embodiment.
  • Example 44 Ten sintered bodies according to Example 44 were produced in the same manner as Example 2 described above. As shown in FIG. 10, the sintered body according to the second embodiment is the same as the sintered body according to the second embodiment except that the third thin tube 70 and the through hole 72 are formed so that the position Pa is the same as the position Pb.
  • Example 45 Ten sintered bodies according to Example 45 were produced in the same manner as Example 2 described above. Similarly to Example 2, the third thin tube 70 and the through hole 72 were formed so that the position Pa was 0.5 mm in the forward direction from the position Pb.
  • Example 46 Ten sintered bodies according to Example 46 were produced in the same manner as Example 2 described above.
  • the sintered body according to the second embodiment is the same as the sintered body according to the second embodiment except that the third thin tube 70 and the through hole 72 are formed so that the position Pa is 2 mm in the positive direction from the position Pb.
  • Reference Example 23 Ten sintered bodies according to Reference Example 23 were produced in the same manner as in Example 2 described above. Except that the third capillary 70 and the through hole 72 are formed so that the position Pa is 0.5 mm in the negative direction from the position Pb, it is the same as the sintered body according to the second embodiment.
  • Reference Example 24 Ten sintered bodies according to Reference Example 24 were produced in the same manner as in Example 2 described above. Except that the third capillary 70 and the through hole 72 are formed so that the position Pa is 2 mm in the negative direction from the position Pb, it is the same as the sintered body according to the second embodiment.
  • Examples 41 to 46 had almost no light transmission effect due to the formation of the through hole 16 (or the third capillary 70 and the through hole 72) in the light emitting portion 12. Accordingly, the through-hole 16 (or the third thin tube 70 and the through-hole 72) is made to be closer to the first thin tube 14a than the position corresponding to the end of the first electrode 26A sealed in the first thin tube 14a in the light emitting unit 12. It can be seen that it is preferable to form it at a position closer to the first capillary 14a by 0.5 mm or more than a position closer to the end of the first electrode 26A.
  • the ceramic tube and the manufacturing method thereof according to the present invention are not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

Dans la présente invention, un premier tube céramique (10A), destiné à une lampe à décharge de haute luminosité, comporte une unité électroluminescente (12) qui émet de la lumière à l'intérieur de celui-ci, et un premier petit tube (14a) et un deuxième petit tube (14b) contenant une électrode scellée et reliés solidairement respectivement aux deux extrémités de l'unité électroluminescente (12). A un emplacement de ladite unité électroluminescente (12), du côté du premier petit tube (14a), est ménagé un trou traversant (16), la direction de la lumière, de l'intérieur à l'extérieur de l'unité électroluminescente, étant la même que celle du prolongement du premier petit tube (14a).
PCT/JP2011/072113 2010-10-08 2011-09-27 Tube céramique et son procédé de production WO2012046598A1 (fr)

Priority Applications (3)

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JP2012537647A JPWO2012046598A1 (ja) 2010-10-08 2011-09-27 セラミックチューブ及びその製造方法
EP11830531.7A EP2626889A4 (fr) 2010-10-08 2011-09-27 Tube céramique et son procédé de production
CN2011800481701A CN103155092A (zh) 2010-10-08 2011-09-27 陶瓷管及其制造方法

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JP2010-228550 2010-10-08

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JPH0737501A (ja) * 1993-07-22 1995-02-07 Iwasaki Electric Co Ltd メタルハライドランプの製造方法
JPH0855606A (ja) 1994-08-15 1996-02-27 Toto Ltd 金属蒸気発光管
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US20060001346A1 (en) 2004-06-30 2006-01-05 Vartuli James S System and method for design of projector lamp
JP2006092865A (ja) * 2004-09-22 2006-04-06 Ushio Inc ショートアーク型放電ランプ
JP2008044344A (ja) 2006-03-24 2008-02-28 Ngk Insulators Ltd 焼結体、発光管及びその製造方法
JP2009530127A (ja) 2006-03-24 2009-08-27 日本碍子株式会社 焼結体の製造方法および焼結体
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JPS63143738A (ja) 1986-12-05 1988-06-16 Toshiba Corp セラミツク放電灯
JPH04163828A (ja) * 1990-10-26 1992-06-09 Nec Kagoshima Ltd 蛍光表示管用カバーガラスの製造方法
JPH05334962A (ja) 1992-05-29 1993-12-17 Toto Ltd 金属蒸気放電灯の製造方法
JP2001035445A (ja) * 1992-07-09 2001-02-09 Toto Ltd 発光管の封止部構造
JPH0721990A (ja) 1993-02-05 1995-01-24 Ngk Insulators Ltd 高圧放電ランプ用セラミック放電管及びその製造方法、並びにそれに用いられるシール材料
JPH0737501A (ja) * 1993-07-22 1995-02-07 Iwasaki Electric Co Ltd メタルハライドランプの製造方法
JPH0855606A (ja) 1994-08-15 1996-02-27 Toto Ltd 金属蒸気発光管
JPH10340705A (ja) * 1997-06-06 1998-12-22 Matsushita Electron Corp 放電ランプ、この放電ランプの製造方法、この放電ランプを用いたランプユニット、およびこのランプユニットを用いた光学システム
JPH1167155A (ja) * 1997-06-27 1999-03-09 Patent Treuhand Ges Elektr Gluehlamp Mbh 高圧放電ランプ
JP2002334653A (ja) * 2001-02-09 2002-11-22 Matsushita Electric Ind Co Ltd 発光管の製造方法及びそれに用いられる中子
WO2002085590A1 (fr) 2001-04-17 2002-10-31 Ngk Insulators, Ltd. Procede de fabrication d'un corps moule, pate de moulage, noyau de moulage, procede de fabrication de ce noyau de moulage, corps creux moule en ceramique, et recipient luminescent
JP2003346723A (ja) * 2002-05-30 2003-12-05 Toshiba Lighting & Technology Corp 放電ランプおよびその製造方法
US20060001346A1 (en) 2004-06-30 2006-01-05 Vartuli James S System and method for design of projector lamp
JP2006092865A (ja) * 2004-09-22 2006-04-06 Ushio Inc ショートアーク型放電ランプ
JP2008044344A (ja) 2006-03-24 2008-02-28 Ngk Insulators Ltd 焼結体、発光管及びその製造方法
JP2009530127A (ja) 2006-03-24 2009-08-27 日本碍子株式会社 焼結体の製造方法および焼結体
JP2010514127A (ja) 2006-12-20 2010-04-30 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ セラミックメタルハライドランプのためのセラミックバーナ
JP2010514125A (ja) 2006-12-20 2010-04-30 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ メタルハライドランプ及びこのようなランプのためのセラミックバーナ

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EP2626889A1 (fr) 2013-08-14
JPWO2012046598A1 (ja) 2014-02-24
EP2626889A4 (fr) 2014-05-28
CN103155092A (zh) 2013-06-12

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