CN101005003A - Semi-transparent ceramic arc tube and its producing method - Google Patents
Semi-transparent ceramic arc tube and its producing method Download PDFInfo
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- CN101005003A CN101005003A CN 200610132512 CN200610132512A CN101005003A CN 101005003 A CN101005003 A CN 101005003A CN 200610132512 CN200610132512 CN 200610132512 CN 200610132512 A CN200610132512 A CN 200610132512A CN 101005003 A CN101005003 A CN 101005003A
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Abstract
The ceramics arc tube includes columniform main body, and ball ends at two ends of the main body. Central tip at the ball end is extended outward to form capillary, which is a hollow tube passing through the ball end. The method includes steps: adding 0.005-0.5% magnesia to superfine alumina powder in high purity, and mixing it to organic binder, carrying out granulating procedure; using the mixture to prepare main body, and ball ends by injection molding; assembling the main body, and two ball ends, and after degreasing it at low temperature and pre-sintering procedure, connecting the three parts to form an integral arc tube; under 1750 - 1850 deg.C, putting the pre-sintered arc tube to hydrogen sintering furnace for heat preservation for 2-6 hour so as to obtain semitransparent ceramics arc tube of alumina. Features are: assembling injection molded main body, and ball ends directly in order to suit scale production, long service life, high light effect and color rendering etc.
Description
Technical field
The present invention relates to metal halid lamp electric arc tube and manufacture method, particularly TRANSLUCENT ALUMINA CERAMIC ARC TUBE and manufacture method.
Background technology
Ceramic material has acid-fast alkali-proof, high temperature resistant, chemical stability excellent characteristics.Compare with the Metal halogen lamp of quartz material, the ceramic gold-halogen lamp that adopts the semitransparent ceramics of polycrystal alumina to make arctube material has working temperature height, light efficiency height, light decay is little, color rendering good and the life-span such as grows at advantage.
Current arc tube for ceramic metal halide lamp mainly adopts the translucent alumina ceramics manufacturing, and shape mainly contains big three types, promptly cylindrical, cylinder and circular cone is combined, elliposoidal.Every type can be divided into 1 formula, 2 formulas, 3 formulas and 5 various ways such as formula again because of the manufacture difference.
Chinese patent ZL 97117991.3 discloses a kind of manufacture method of cylindrical metal halogen lamp earthenware, and this method adopts the method for 2 formulas or 3 formula combinations to make earthenware, than 5 former formulas certain improvement has been arranged.As shown in Figure 2, cylindrical electric arc tube is made up of cylinder-shaped body 7 and two end faces 6.But the cold junction of cylindrical electric arc tube is easily assembled the very liquid metal halide of high-temperature is arranged, very big to the corrosivity of electric arc tube, easily cause the light decay and the inefficacy of lamp, and the junction temperature distributing disproportionation is even, because stress is concentrated, rupture easily in the junction.
Chinese patent ZL 00122245.7 discloses a kind of manufacture method of sintering carriage and multiple shaped ceramic electric arc tube of sintered ceramic electric arc tube, comprises 2 formulas and 3 cylindrical electric arc tubes of formula and 2 formula elliposoidal electric arc tubes.There is the shortcoming same with ZL 97117991.3 in cylindrical electric arc tube.And 2 formula elliposoidal electric arc tubes are owing to connect in the ellipsoid middle part, and the coupling part diameter is big, and it is short to connect lap, and is in the maximum temperature position, easily produces gas leakage and broken.
Chinese patent ZL 03131897.5 discloses a kind of 2 formula cylinders and the combined ceramic arc pipe manufacturing method of circular cone, as shown in Figure 3,2 body case are in thicker cylinder position interference fit, after under different temperatures, distinguishing biscuiting, the cylinder 8 of a shell is inserted the thicker cylinder 9 of another parts, and high temperature burns till the semi-transparent ceramic arc tube of an integral body again.This method needs twice biscuiting be assembled into whole electric arc tube, and 2 shells do not have the assembling and positioning face, and the axiality and the dimensional accuracy of assembling back 2 parts can't guarantee that this will exert an influence to the accurate sealing-in of electrode.
Chinese patent ZL 200610035124.9 discloses a kind of manufacture method of elliposoidal ceramic arc tube, comprises 1 formula and 3 formulas.For 3 formula electric arc tubes, need shaping again after the biscuiting, just can be assembled into the one sintering, production efficiency is low, also can't guarantee to assemble the axiality and the dimensional accuracy of back 3 parts.
Summary of the invention
One of purpose of the present invention is to provide a kind of production efficiency height, has higher dimensional precision, long-life metal halid lamp transparent alumina ceramics electric arc tube.
Two of purpose of the present invention is to provide a kind of production efficiency height, has the manufacture method of higher dimensional precision, long-life metal halid lamp usefulness transparent alumina ceramics electric arc tube.
One of purpose of the present invention can realize like this, design a kind of semi-transparent ceramic arc tube, comprise cylinder-shaped body, also comprise the spherical end surface that is arranged on the cylinder-shaped body two ends, end, the spherical end surface center formation capillary that stretches out, capillary is hollow pipe and penetrates spherical end surface.
Two of purpose of the present invention can realize like this, designs a kind of manufacture method of semitransparent ceramics electric arc, may further comprise the steps:
A, purity is added 0.005 to 0.5% magnesium oxide greater than 99.99% ultra-fine alumina powder, with 10% to 18% organic binder bond mixing granulation;
Main body and end face are made in B, the above-mentioned compound injection moulding of employing;
C, main body and two end faces directly are assembled together, through after low-temperature defatted, are warmed up to 1200 to 1500 ℃ of presintering, after the presintering, three parts connect into as a whole electric arc tube;
D, the electric arc tube after the presintering is put into hydrogen sintering furnace,, obtain TRANSLUCENT ALUMINA CERAMIC ARC TUBE 1750 to 1850 ℃ of insulations 2 to 6 hours down.
Three parts of the present invention can adopt continuous injection moulding, adopt directly assembling back presintering, and technology is simple, be fit to large-scale production, the dimensional accuracy height of ceramic arc tube behind the sintering adopts cylinder and ball combining structure, it is long to have a life-span, light efficiency height, characteristics such as little and color rendering height of light decay.
Description of drawings
Fig. 1 is the structural representation of preferred embodiment of the present invention.
Fig. 2 is the structural representation of one of prior art.
Fig. 3 is two a structural representation of prior art.
Embodiment
The invention will be further described below in conjunction with embodiment.
As shown in Figure 1, a kind of semi-transparent ceramic arc tube comprises cylinder-shaped body 1, also comprises the spherical end surface 2 that is arranged on the cylinder-shaped body two ends, and end, spherical end surface 2 center stretches out and forms capillary 3, and capillary 3 is for hollow pipe and penetrate spherical end surface 2.Spherical end surface is compared with existing tapered end face, and major advantage is that the temperature field and the stress field of scratch start pipe is more even, and warm-up time of lamp and to reach the logical required time of full light shorter, the life-span of electric arc tube is also longer.
The port outer rim of described spherical end surface 2 is provided with the step fitting surface that matches with cylinder body 1 port.Step fitting surface on the spherical end surface is beneficial to the precision assembling of three parts between spherical end surface and the cylinder body.
The wall thickness of described cylinder body 1 is 0.4～1.2 millimeter.According to the power difference, the thickness difference of wall thickness, wall thickness is directly proportional with power.
The wall thickness of described spherical end surface 2 is 1.5～2.5 times of cylinder body wall thickness.
Described capillary 3 at the caliber at spherical end surface place greater than caliber by end.Described capillary 3 extremely ends the uniform diameter transition of end at the caliber at spherical end surface place.Capillary portion to thin transition, both can improve the intensity of electric arc tube by slightly, guaranteed that simultaneously capillary head and electrode sealing-in portion temperature are lower, alleviated the corrosion of metal halide steam to glass solder.
This ceramic arc tube comprises two spherical end surfaces and cylinder body three parts.A and C are identical, form the spherical end surface of electric arc tube and the capillary of support electrode, and the wall thickness of the spherical end surface of A and C is 1.5 to 2.5 times of cylinder body wall thickness.
A kind of manufacture method of semitransparent ceramics electric arc may further comprise the steps:
A, purity is added 0.005 to 0.5% magnesium oxide (MgO) greater than 99.99% ultra-fine alumina powder, with 10% to 18% organic binder bond mixing granulation;
B, the above-mentioned compound of use adopt injection moulding forming body and end face respectively;
C, main body and two end faces directly are assembled together, through after low-temperature defatted, are warmed up to 1200 to 1500 ℃ of presintering, after the presintering, three parts connect into as a whole electric arc tube;
D, the electric arc tube after the presintering is put into hydrogen sintering furnace,, obtain TRANSLUCENT ALUMINA CERAMIC ARC TUBE 1750 to 1850 ℃ of insulations 2 to 6 hours down.
Three parts refill after the biscuiting respectively joins pre-burning, three parts directly can be assembled the back pre-burning, becomes complete ceramic arc tube.
Also add the yttria (Y below 0.5% in the described steps A
2O
3).Also add the lanthanum sesquioxide (La below 0.5% in the described steps A
2O
3).
Organic binder bond is polyethylene, paraffin, stearic acid in the described steps A.
Organic binder bond polyethylene, paraffin, stearic ratio are 3%～6%, 6%～10%, 0.5%～2% in the described steps A.
Make the ratio of the ratio of organic binder bond polyethylene, paraffin in the material of main element in the described steps A greater than organic binder bond polyethylene, paraffin in the end face component materials.Because some distinguishes the batching of the batching of end face parts and main element,, end face parts and main element are closely combined in the contraction of sintering process middle-end face component contraction less than main element.
Embodiment one:
A, purity added greater than 99.99% ultra-fine alumina powder mix with organic binder bond 0.1% magnesium oxide (MgO) back, granulation.To the batch of main element, add 5% polyethylene, 8% paraffin and 1% stearic acid; For the batch of end face parts, add 4.5% polyethylene, 7.5% paraffin and 1% stearic acid.
B, at 130 ℃, carry out injection moulding under the 80MPa, obtain the base substrate of each parts.
C, the end face parts directly are assembled together with main element, with 30 ℃ of/hour heating rates be warming up to 600 ℃ carry out degreasing after, be warming up to 1300 ℃ with 100 ℃ of/hour heating rates, be incubated 2 hours and carry out presintering,
D, the electric arc tube after the presintering is put into hydrogen sintering furnace, 1780 ℃ of insulations 3 hours down.
Density through the resulting transparent alumina ceramics electric arc tube of above-mentioned manufacture method is 3.985g/cm
3, average grain size is 20 microns to 30 microns, and three-point bending strength is 400MPa, and straight-line luminous transmittance is 30%.Produced ceramic arc tube has very high dimensional accuracy, and the axiality of three parts is better than 0.1mm, and the length dimension precision is ± 0.1mm that capillary endoporus dimensional tolerance is ± 0.02mm.The earthenware of this method manufacturing needn't carry out following process, can directly carry out the accurate sealing-in with electrode after the polishing.The mean accuracy of alumina powder is 0.5 micron in the present embodiment.
The fit of 3 parts, prior art all are to need twice assembling, and the present invention once assembles and can finish, the production efficiency height.
Embodiment two:
Purity is added the Y of 0.01% magnesium oxide (MgO) and 0.02% greater than 99.99% ultra-fine alumina powder
2O
3Mix with organic binder bond the back, granulation.To the batch of main element, add 5% polyethylene, 8% paraffin and 1% stearic acid; For the batch of end face parts, add 4.5% polyethylene, 7.5% paraffin and 1% stearic acid.
Adopt injection moulding, assembling, degreasing and the sintering process identical, obtain TRANSLUCENT ALUMINA CERAMIC ARC TUBE with embodiment one.
Density through the resulting transparent alumina ceramics electric arc tube of above-mentioned manufacture method is 3.986g/cm
3, average grain size is 20 microns to 40 microns, and three-point bending strength is 380MPa, and straight-line luminous transmittance is 32%.
Embodiment three:
A, purity is added 0.005% magnesium oxide (MgO) and 0.01%La greater than 99.99% ultra-fine alumina powder
2O
3After, mix with organic binder bond, granulation.To the batch of main element, add 4.8% polyethylene, 8.4% paraffin and 1% stearic acid; For the batch of end face parts, add 4.2% polyethylene, 7.8% paraffin and 1% stearic acid.
B, at 120 ℃, carry out injection moulding under the 60MPa, obtain the base substrate of each parts.
C, the end face parts directly are assembled together with main element, with 25 ℃ of/hour heating rates be warming up to 600 ℃ carry out degreasing after, be warming up to 1300 ℃ with 100 ℃ of/hour heating rates, be incubated 2 hours and carry out presintering,
D, the electric arc tube after the presintering is put into hydrogen sintering furnace, 1820 ℃ of insulations 3 hours down.
Density through the resulting transparent alumina ceramics electric arc tube of above-mentioned manufacture method is 3.987g/cm
3, average grain size is 30 microns to 40 microns, and three-point bending strength is 35 MPa, and straight-line luminous transmittance is 40%.
Claims (12)
1, a kind of semi-transparent ceramic arc tube, comprise cylinder-shaped body (1), it is characterized in that: also comprise the spherical end surface (2) that is arranged on the cylinder-shaped body two ends, spherical end surface (2) end, center stretches out and forms capillary (3), and capillary (3) is for hollow pipe and penetrate spherical end surface (2).
2, semi-transparent ceramic arc tube according to claim 1 is characterized in that: the port outer rim of described spherical end surface (2) is provided with the step fitting surface that matches with cylinder body (1) port.
3, semi-transparent ceramic arc tube according to claim 1 is characterized in that: the wall thickness of described cylinder body (1) is 0.4～1.2 millimeter.
4, semi-transparent ceramic arc tube according to claim 1 is characterized in that: the wall thickness of described spherical end surface (2) is 1.5～2.5 times of cylinder body wall thickness.
5, semitransparent ceramics electric arc according to claim 1 is characterized in that: described capillary (3) at the caliber at spherical end surface place greater than caliber by end.
6, semitransparent ceramics electric arc according to claim 5 is characterized in that: described capillary (3) extremely ends the uniform diameter transition of end at the caliber at spherical end surface place.
7, a kind of manufacture method of semitransparent ceramics electric arc is characterized in that may further comprise the steps:
A, purity is added 0.005% to 0.5% magnesium oxide greater than 99.99% ultra-fine alumina powder, with 10% to 18% organic binder bond mixing granulation;
Main body and end face are made in B, the above-mentioned compound injection moulding of employing;
C, main body and two end faces directly are assembled together, through after low-temperature defatted, are warmed up to 1200 to 1500 ℃ of presintering, after the presintering, three parts connect into as a whole electric arc tube;
D, the electric arc tube after the presintering is put into hydrogen sintering furnace,, obtain TRANSLUCENT ALUMINA CERAMIC ARC TUBE 1750 to 1850 ℃ of insulations 2 to 6 hours down.
8, the manufacture method of semitransparent ceramics electric arc according to claim 7 is characterized in that: also add the yittrium oxide below 0.5% in the described steps A.
9, the manufacture method of semitransparent ceramics electric arc according to claim 7 is characterized in that: also add the lanthana below 0.5% in the described steps A.
10, the manufacture method of semitransparent ceramics electric arc according to claim 7 is characterized in that: organic binder bond is polyethylene, paraffin, stearic acid in the described steps A.
11, the manufacture method of semitransparent ceramics electric arc according to claim 10 is characterized in that: organic binder bond polyethylene, paraffin, stearic ratio are 3%～6%, 6%～10%, 0.5%～2% in the described steps A.
12, according to the manufacture method of claim 7 or 10 described semitransparent ceramics electric arcs, it is characterized in that: make the ratio of the ratio of organic binder bond polyethylene, paraffin in the material of main element in the described steps A greater than organic binder bond polyethylene, paraffin in the end face component materials.
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| CN102515720A (en) * | 2011-12-08 | 2012-06-27 | 西安交通大学 | Preparation method of transparent alumina ceramic |
| CN102709148A (en) * | 2012-06-06 | 2012-10-03 | 宁波泰格尔陶瓷有限公司 | Alumina ceramic discharge tube with air purification function and manufacturing method |
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| CN102976717A (en) * | 2012-09-29 | 2013-03-20 | 蔡丛荣 | Alumina ceramic electrical arc tube manufacturing method |
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| CN102515720A (en) * | 2011-12-08 | 2012-06-27 | 西安交通大学 | Preparation method of transparent alumina ceramic |
| CN102709148A (en) * | 2012-06-06 | 2012-10-03 | 宁波泰格尔陶瓷有限公司 | Alumina ceramic discharge tube with air purification function and manufacturing method |
| CN102709148B (en) * | 2012-06-06 | 2014-10-22 | 宁波泰格尔陶瓷有限公司 | Alumina ceramic discharge tube with air purification function and manufacturing method |
| CN102898173A (en) * | 2012-08-27 | 2013-01-30 | 潮州三环（集团）股份有限公司 | Two-piece ceramic bulb shell molding and docking method |
| CN102898173B (en) * | 2012-08-27 | 2014-10-08 | 潮州三环（集团）股份有限公司 | Two-piece ceramic bulb shell molding and docking method |
| CN102976717A (en) * | 2012-09-29 | 2013-03-20 | 蔡丛荣 | Alumina ceramic electrical arc tube manufacturing method |
| CN103500697A (en) * | 2013-09-27 | 2014-01-08 | 国家电网公司 | Method for manufacturing microwave induction electrodeless ceramic metal halide bulb and electrodeless ceramic metal halide bulb |
| CN106116536B (en) * | 2016-06-28 | 2019-06-21 | 广东百工新材料科技有限公司 | A kind of ceramic cover plate preparation process |
| CN106116536A (en) * | 2016-06-28 | 2016-11-16 | 佛山华智新材料有限公司 | A kind of ceramic cover plate preparation technology |
| TWI690380B (en) * | 2017-12-06 | 2020-04-11 | 大陸商全億大科技（佛山）有限公司 | Method for manufacturing metal products of unusual shape |
| CN109676141A (en) * | 2017-12-06 | 2019-04-26 | 全亿大科技（佛山）有限公司 | The manufacturing method and abnormal complex metal product of abnormal complex metal product |
| US11065687B2 (en) | 2017-12-06 | 2021-07-20 | Champ Tech Optical (Foshan) Corporation | Method for manufacturing metal product with two blanks |
| CN110540410A (en) * | 2018-05-29 | 2019-12-06 | 山东工业陶瓷研究设计院有限公司 | feed for alumina ceramic injection molding and preparation method thereof |
| CN110540410B (en) * | 2018-05-29 | 2022-03-11 | 山东工业陶瓷研究设计院有限公司 | Feed for alumina ceramic injection molding and preparation method thereof |
| CN109020562A (en) * | 2018-10-13 | 2018-12-18 | 娄底市安地亚斯电子陶瓷有限公司 | A kind of automobile ceramics functional component high temperature at porcelain binder removal |
| CN109020562B (en) * | 2018-10-13 | 2020-07-21 | 娄底市安地亚斯电子陶瓷有限公司 | Glue discharging process for high-temperature porcelain forming of automobile ceramic functional part |
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Open date: 20070725 |