WO2005028388A1 - 酸化亜鉛−アルミナ−シリカ系結晶化ガラス及びそれを用いた反射鏡基体 - Google Patents
酸化亜鉛−アルミナ−シリカ系結晶化ガラス及びそれを用いた反射鏡基体 Download PDFInfo
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- WO2005028388A1 WO2005028388A1 PCT/JP2004/013670 JP2004013670W WO2005028388A1 WO 2005028388 A1 WO2005028388 A1 WO 2005028388A1 JP 2004013670 W JP2004013670 W JP 2004013670W WO 2005028388 A1 WO2005028388 A1 WO 2005028388A1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0036—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/097—Glass compositions containing silica with 40% to 90% silica, by weight containing phosphorus, niobium or tantalum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/10—Mirrors with curved faces
Definitions
- the present invention relates to a base for a reflector for reflecting light from a light source lamp (reflector base), and particularly to a crystallized glass suitably used as a reflector base for a lighting device or a projector light source. .
- a reflector for reflecting light irradiated with a light source lamp power is used.
- a reflecting mirror is a member that is exposed to a high temperature due to the heat generated by a light source lamp such as an ultra-high pressure mercury lamp, and is required to have high heat resistance. Therefore, conventionally, a reflector having a reflective film formed on a reflector base made of heat-resistant glass having excellent heat resistance (for example, Pyrex (registered trademark), manufactured by KOJUNG Co., Ltd.) has been used.
- ⁇ -spodumene solid solution ⁇ -spodumene: Li O— Al O 4SiO
- ⁇ -spodumene Li O— Al O 4SiO
- Lithia-alumina such as 2 2 3 2 Cryptite solid solution (j8 -eucryptite: Li O— Al O—2SiO)
- silica-based crystallized glass hereinafter sometimes referred to as “lithia-based crystallized glass”
- the present inventors have also celsian (ce lsi an: BaO- Al O- 2SiO) barrier alumina chromatography, such as sheet
- Lica-based crystallized glass (hereinafter sometimes referred to as “barrier-based crystallized glass”) as a constituent material of a reflector base (for example, see Patent Document 2).
- Patent Document 1 Japanese Patent Publication No. 7-92527
- Patent Document 2 JP-A-2002-109923
- the melting point is inferior since the melting point is as high as about 1500 ° C or more.
- special equipment such as a melting furnace
- the manufacturing conditions are limited. there were.
- the aforementioned Bruno rear-based crystallized glass having a melting point is no problem, such as 1450 ° C before and after the low Guso, thermal expansion coefficient (JIS R1618: 40- 400 ° C ) is 30 X 10- 7 - 45 X 10- 7 a (Z ° C) about had room for still improved in terms of heat resistance.
- the present invention has been made to solve the above-mentioned problems of the prior art, and has a higher performance crystallized glass having a composition different from these crystallized glasses, specifically, It has at least high heat resistance equivalent to Noria-based crystallized glass, preferably excellent heat resistance comparable to Lithia-based crystallized glass, and has a low melting point like barrier-based crystallized glass. It is to provide a good crystallized glass.
- the inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, it has been found that the above object can be achieved by adding a specific modifying component to zinc oxide alumina silica-based crystallized glass. And completed the present invention. That is, according to the present invention, the following oxidized zinc alumina silica-based crystallized glass is provided.
- Zinc oxide ZnO
- alumina Al 2 O 3
- silica SiO 2
- a glass wherein the main component is composed of 20 to 30% by mass of zinc oxide, 15 to 25% by mass of alumina, and 50 to 60% by mass of silica; It contains 3 to 6 parts by mass of zircon as the nucleating agent with respect to 100 parts by mass of the main component, and further contains, in addition to the main component and the nucleating agent, Lithium oxide (Li O), sodium oxide (Na O), potassium oxide (KO),
- a zinc oxide-alumina-silica-based crystallized glass containing at least one selected component is provided.
- a crystal phase is composed of the main components, and the main crystal phase is zinc petalite (Zn— The zinc oxide, alumina, silica-based crystallized glass according to the above [1], wherein the glass is a petallite) solid solution or a ⁇ -quartz solid solution.
- Tin dioxide as the nucleating agent is contained in place of part of zirconium as the nucleating agent, and the content thereof is 0.5-4 based on 100 parts by mass of the main component.
- the main body comprising the oxidized zinc alumina silica-based crystallized glass according to any one of the above [1] to [4], wherein the main body has a concave surface for disposing a reflective film,
- a reflecting mirror base comprising: a metal mesh embedded in a main body.
- the network comprises at least one selected from the group consisting of nickel (Ni), cobalt (Co), stainless steel (SUS: Steel Use Stainless) and kovar (kobar), and a main constituent component.
- Ni nickel
- Co cobalt
- SUS Steel Use Stainless
- kovar kobar
- the reticulated body is a metallic force having at least one selected from the group consisting of gold (Au), platinum (Pt), silver (Ag), and copper (Cu) as a main component.
- the zinc oxide-alumina-silica-based crystallized glass of the present invention (hereinafter sometimes referred to as "zinc oxide-based crystallized glass”) has at least the same high heat resistance and resistance as that of the noria-based crystallized glass. In some cases, it has excellent heat resistance comparable to lithia-based crystallized glass, and has good melting properties with a low melting point like barrier-based crystallized glass. Further, as compared with the lithia-based crystallized glass, the crystal stability is excellent over time under high temperature conditions, and the volume shrinkage is extremely small even when exposed to high temperature for a long time.
- FIG. 1 is a phase diagram showing a preferable main component composition ratio in the oxidized zinc alumina silica-based crystallized glass of the present invention.
- FIG. 2 is a graph showing the change over time in the coefficient of thermal expansion of the crystallized glass of Example 50.
- FIG. 3 is a graph showing the change over time in the coefficient of thermal expansion of the crystallized glass of Comparative Example 14.
- FIG. 4 is a side sectional view showing a general configuration of a reflector base.
- FIG. 5 is a process diagram showing steps (a) and (f) of forming a reflector base using a reflector base forming die.
- FIG. 6 is a side sectional view showing a use state of the reflector base.
- FIG. 7 (a) is a side sectional view showing a configuration of a reflector base of the present invention.
- FIG. 7 (b) is a side sectional view showing the configuration of the reflector base of the present invention.
- FIG. 7 (c) is a side sectional view showing the configuration of the reflector base of the present invention.
- FIG. 8 is a process chart showing steps (a) to (g) of forming the reflector base of the present invention using a reflector base forming die.
- the crystallized glass of the present invention is a zinc oxide-based crystallized glass containing zinc oxide, alumina, and silica as main components and zirconia as a nucleating agent.
- the composition ratio of zinc oxide, alumina, and silica, and the content of zircon as a nucleating agent were controlled to predetermined values, and in addition to the main component and the nucleating agent, It contains a decorative component.
- the crystallized glass of the present invention contains zinc oxide, alumina, and silica as main components. Crystallized glass of such a system can be expected to exhibit excellent heat resistance with a small coefficient of thermal expansion.
- a crystal phase is composed of zinc oxide, alumina, and silica as main components. Its crystal phase is zinc solid (Zn—petallite: ZnO'Al O-3SiO, ZnO-2SiO
- the crystallized glass of the present invention preferably contains substantially no ganite as its crystal phase, and preferably contains substantially no ganite (substantially contains 0% by mass of ganite). It is particularly preferable that the main crystal phase is more preferably a zinc petalite solid solution or a ⁇ -quartz solid solution.
- the term “main crystal phase” refers to a peak of a diffraction X-ray measured at room temperature (25 ° C.) by a powder X-ray diffractometer (for example, trade name: RINT2500, manufactured by Rigaku Corporation). It means the crystalline phase with the highest strength.
- the constituent ratios of zinc oxide, alumina, and silica contained as main components are as follows. (Hereinafter, referred to as “principal component composition ratio”) needs to be controlled to a predetermined value.
- the hatched portion of the phase diagram shown in FIG. 1 is composed of 20-30% by mass of zinc oxide, 15-25% by mass of alumina, and 50-60% by mass of silica, and A zinc betalite solid solution or
- Table 2 shows the crystal phase and the coefficient of thermal expansion of the oxidized zinc alumina silica-based crystallized glass having the main component composition ratios indicated by the symbols (I)-(VII) in the phase diagram of FIG. 9 is a table showing the results of evaluation of. Specifically, it has a main component composition ratio shown by the symbols (I)-(VII) in FIG. 1, and further has a nucleating agent (zirconia) in the amount shown in Table 1 and a glass fining agent (antimony oxide). Zinc oxide containing (Sb 2 O 3)) and no modifying components
- the crystal phase is a powder X-ray diffractometer (RINT2500, Rigaku Denki (product name: RINT2500) having a rotating anti-cathode target (Cu) and a graphite monochromator as a powder X-ray diffractometer.
- X-ray source CuKa line, tube voltage 50 kV, tube current 30 mA, diffraction angle 2 ⁇ 10 °-40 °, diffraction peak of crystallized glass at room temperature (25 ° C) It was evaluated by measuring.
- the crystal phase having the highest measured diffraction X-ray peak intensity was defined as the main crystal phase of the crystallized glass.
- 40- 400 ° Contact Keru thermal expansion coefficient C is, forming crystallized glass obtained in the following equivalent lithia-based crystallized glass (20 X 10- 7 (Z ° C) or less) the symbol "" a case where obtained, equal to or less than the Roh rear based crystallized glass (45 X 10- 7 (Z ° C) or less) of a case where the crystallized glass is obtained " ⁇ ", Roh rear-based crystallized glass greater than (4 5 X 10- 7 (Z ° C) greater than) the case was crystallized glasses force obtained such Chikaratsu was expressed as "X".
- the main component zinc oxide 20- 30 mass 0/0, alumina 15 25 Weight 0/0, and is composed of a ratio of shea silica 50- 60 wt%, and, across these components Zinc-alumina-silica-based crystallized glass, which accounts for 100% by mass, has a low coefficient of thermal expansion because of its main crystal phase being a zinc petalite solid solution or ⁇ 8-quartz solid solution.
- crystallized glass having the main component composition ratio employed in Reference Example 1 or Reference Example 3 is preferable.
- the crystallized glass having these main component composition ratios has an extremely small coefficient of thermal expansion comparable to that of the lithia-based crystallized glass, exhibits excellent heat resistance, and is a translucent glass with little cloudiness.
- the coefficient of thermal expansion can be stably maintained. It is preferable in that a small crystallized glass can be obtained.
- the difference in the coefficient of thermal expansion between the reflector and the deposited reflective material can be reduced, and cracks can be effectively prevented from occurring in the reflective material. Crystallized glass having the following main component composition ratio is particularly preferred.
- the crystallized glass having the main component composition ratio employed in Reference Example 5 has less garnite formation. Due to the tendency to be induced, the coefficient of thermal expansion is rather large, and the heat resistance is slightly inferior. It is a glass, which absorbs infrared light, so that when it is used as a reflector base, the internal temperature tends to rise due to heat storage, and in addition, it is difficult to find defects such as internal defects during visual inspection. Crystallized glass having the main component composition ratio used in Reference Example 6 or Reference Example 7 may have a large thermal expansion coefficient depending on manufacturing conditions such as the crystallization temperature, or crystallization may not be possible. May not progress A.
- the crystallized glass having these main component composition ratios has a thermal expansion coefficient at least equal to or lower than that of the nori-based crystallized glass and exhibits excellent heat resistance.
- the main component is a at Sani ⁇ zinc 20- 30 mass 0/0, alumina 15 one 25 wt%, and silica 50- 60 wt% of the configured crystallized glass in a ratio
- the results show that the heat resistance is good, but the melting point is high and the melting property is not sufficient.
- Such a crystallized glass has a problem in that the moldability is poor. Therefore, it is an essential condition that the crystallized glass of the present invention contains a specific modifying component described later.
- the crystallized glass of the present invention contains zirconia as a nucleating agent.
- nucleating agent refers to a substance for promoting the precipitation of fine glass crystals in crystallized glass.
- titanium (TiO 2) or the like is contained.
- the nucleating agent in Ming's crystallized glass must contain zirconia. Crystallized glass containing titanium as a nucleating agent tends to cause the formation of garnite having a remarkably large thermal expansion coefficient, and therefore the crystallized glass itself tends to have a large thermal expansion coefficient, resulting in poor heat resistance. May be inferior. Crystallized glass containing zirconia as a nucleating agent is unlikely to cause such problems, and is preferred!
- Zirconia as a nucleating agent must be contained in an amount of 3 to 6 parts by mass based on 100 parts by mass of the main component. If the content is less than the above range, the zirconia will not exhibit the effect as a nucleating agent, and the crystallization of glass may be insufficient. When the nucleating agent is melted in advance, it is not preferable in that the melting may be difficult.
- the crystallized glass of the present invention is prepared by mixing a main component, a nucleating agent, and a modifying component at a predetermined ratio to prepare a glass raw material, and melting the glass raw material to form a molten glass. By forming it into a desired shape and performing a heat treatment (crystallization treatment), it can be used as a reflector base.However, in the rare case of melting and forming glass materials, the zirconia as a nucleating agent is rarely re-used. In some cases, a devitrification phenomenon or an increase in the surface roughness of the molded article due to the crystal may be observed. [0038] The frequency of occurrence of the above phenomenon is not so high. However, the devitrification phenomenon may make the crystallized glass inhomogeneous, and an increase in the surface roughness of the molded body may reduce the reflection characteristics of the reflector, and therefore, it is preferable to suppress as much as possible.
- the crystallized glass of the present invention contains tin dioxide as a nucleating agent instead of a part of zirconia as a nucleating agent. If necessary, zirconium is used as a nucleating agent. It is preferable to contain both tin dioxide and, as the total amount thereof, contain 3 to 6 parts by mass with respect to 100 parts by mass of the main component.
- the content of zirconia as a nucleating agent is mainly used. It is effective to use 3 parts by mass or less for 100 parts by mass.
- the formation of crystal nuclei tends to be insufficient due to the low content of the nucleating agent, and the crystallinity may be poor in some cases.
- crystallized glass containing tin dioxide as a nucleating agent instead of a part of zirconia as a nucleating agent can be obtained by melting and forming a glass raw material while maintaining good crystallinity.
- the melting temperature of the glass it is preferable in that the melting temperature of the glass can be lowered and the melting property can be improved.
- Tin dioxide as a nucleating agent is preferably contained in an amount of 0.5 to 4 parts by mass with respect to 100 parts by mass of the main component, and 0.5 to 2 parts by mass. Is more preferred. If the content is less than the above range, the effect of suppressing the recrystallization of zirconia by tin dioxide may not be able to be enjoyed.If the content is more than the unfavorable range, tin dioxide itself tends to recrystallize, As in the case of the zirconia, it is not preferable in that the devitrification phenomenon and the increase in the surface roughness of the molded body may occur.
- zircona as a nucleating agent is contained in an amount of 2-3 parts by mass with respect to 100 parts by mass of the main component. With such a content, it is possible to suppress recrystallization of zirconia in the stage of melting and forming the glass raw material while maintaining good crystallinity.
- the crystallized glass of the present invention contains 3 parts by mass of zirconia as a nucleating agent and 2 parts by mass of tin dioxide with respect to 100 parts by mass of the main component. Most preferred.
- Such crystallized glass not only can effectively suppress the recrystallization of zirconia in the stage of melting and forming the glass raw material while maintaining good crystallinity, but also its main purpose.
- the crystal phase can be a zinc petalite solid solution or a j8-quartz solid solution, it exhibits excellent heat resistance comparable to a lithia-based crystallized glass with a small coefficient of thermal expansion.
- the crystallized glass of the present invention comprises at least one kind of component selected from the group consisting of lithium oxide, sodium iodide, potassium oxide, diphosphorus pentoxide, niobium oxide, and tantalum oxide as modifying components. It contains.
- modifying component means a substance that electrostatically bonds with non-crosslinking oxygen in a crystal structure composed of a main component and affects various physical properties of glass.
- the modifying components of the crystallized glass include oxides of alkali metals (lithium, sodium, lithium, rubidium, cesium, etc.) and oxidations of alkaline earth metals (magnesium, calcium, strontium, barium, etc.). Products, transition metals (yttrium, vanadium, niobium, tantalum, molybdenum, etc.), oxides of non-metals (boron, phosphorus, etc.), bismuth oxide (BiO 2), etc.
- lithium oxide lithium oxide, sodium, lithium, rubidium, cesium, etc.
- oxidations of alkaline earth metals magnesium, calcium, strontium, barium, etc.
- transition metals yttrium, vanadium, niobium, tantalum, molybdenum, etc.
- oxides of non-metals boron, phosphorus, etc.
- bismuth oxide bismuth oxide
- Consists of sodium oxide, potassium oxide, phosphorus pentoxide, niobium oxide, and tantalum oxide At least one component selected from the group (hereinafter sometimes abbreviated as “six components”) must be included as a decoration component!
- a crystallized glass containing at least one of the above-mentioned six components as a modifying component has a more stable coefficient of thermal expansion and more excellent heat resistance than a crystallized glass not containing the above-mentioned six components. In addition to being excellent, the meltability is also good, and the moldability of glass is excellent.
- crystallized glass containing lithium oxide as a modifying component has a particularly low melting point (approximately 1450-1500 ° C) and good glass meltability. In doing so, there is no need for special equipment (such as a melting furnace) that can withstand temperatures as high as 1500 ° C or more, and there are few restrictions on manufacturing conditions. That is, it is possible to manufacture the reflector base very easily.
- the crystallized glass containing lithium oxide, sodium iodide and potassium iodide as the modifying components was compared with the crystallized glass containing diphosphorus pentoxide as the modifying component. And good crystallinity. Further, the crystallized glass containing niobium oxide or tantalum oxide has good melting properties and also has good crystallinity at a low crystallization temperature.
- the above-mentioned six components as modifying components are preferably contained in a total amount of 0.2-5.0 parts by mass with respect to 100 parts by mass of the main component as a total amount of the six components. -4.6 parts by mass is more preferable. If the content is less than the above range, the effect as a modifying component may not be exhibited. If the content is more than the above range, the coefficient of thermal expansion may be undesirably increased.
- the preferable content of lithium oxide is 0.3 to 0.75 parts by mass with respect to 100 parts by mass of the main component. If the content is less than the above range, it is not preferable in that the effect of improving the melting property of glass by lithium oxide may not be obtained.
- a preferable content of diphosphorus pentoxide is 11 to 13 parts by mass with respect to 100 parts by mass of the main component. If the content is less than the above range, the effect of improving the melting property of the glass by the pentoxide aniline may not be able to be enjoyed, and if it exceeds the unfavorable range, the crystallinity of the glass is low. However, it is not preferable in that crystallization may be insufficient.
- the preferred content of sodium acid sodium is 0.4 to 11 parts by mass with respect to 100 parts by mass of the main component. It is. When the content is less than the above range, the effect of improving the crystallinity by sodium oxynitride may not be obtained, which is more preferable.
- the preferable content of potassium oxysulfide is 0.5-1.5 parts by mass with respect to 100 parts by mass of the main component. If the content is less than the above range, it is not preferable because the crystallinity improving effect of potassium iodide may not be obtained.
- a preferable content of the niobium acid is 0.1-0.5 parts by mass with respect to 100 parts by mass of the main component.
- the content is less than the above range, the melting property is improved by oxidizing niobium, the crystallization temperature is reduced, and the crystallinity improving effect may not be obtained.
- the preferable content of tantalum oxide is 0.1 to 0.5 part by mass with respect to 100 parts by mass of the main component. If the content is less than the above range, it is not preferable because there is a possibility that the effect of improving the melting property, lowering the crystallization temperature, and improving the crystallinity with the use of di-tantalum may not be obtained.
- the crystallized glass of the present invention may contain another modifying component as long as it contains at least one of the above six components as the modifying component.
- another modifying component it is preferable that about 0.1 to 0.5 part by mass of vanadium oxide (VO) or molybdenum oxide (MoO) is contained as a modifying component in 100 parts by mass of the main component.
- VO vanadium oxide
- MoO molybdenum oxide
- the content of the modifying component impairs the preferable effect of the crystallized glass of the present invention, that is, the effect of having a thermal expansion coefficient at least equal to or lower than that of the barrier-type crystallized glass and exhibiting excellent heat resistance. Should be limited to no.
- an alkaline earth metal oxidized product (acid oxidized magnesium) which is usually suitably used as a modified component of the crystallized glass is generally important.
- MgO calcium oxide
- ScO strontium oxide
- BaO barium oxide
- BaO boron oxide
- YO yttrium oxide
- BiO bismuth oxide
- crystallized glass containing boron oxide as a modifying component has an increased coefficient of thermal expansion and reduced heat resistance. It is remarkable. Therefore, in the crystallized glass of the present invention, it is preferable that at least boron oxide as a modifying component is not substantially contained (boron oxide as a modifying component is substantially contained at 0% by mass). ,.
- the crystallized glass of the present invention may contain, in addition to the main component, the nucleating agent, and the modifying component, an additive carohydrate depending on the purpose.
- an additive carohydrate for example, as a glass fining agent, 100 parts by mass of the main component, about 0.5 parts by mass of antimony oxide (Sb 2 O 3) is included in melting the glass.
- the crystallized glass of the present invention is prepared by mixing the above-described main component, nucleating agent, and modifying component at a predetermined ratio to prepare a glass raw material, and melting the glass raw material to obtain a glass. It can be obtained by performing a heat treatment (crystallization treatment) at a high temperature of about 2 to 4 hours.
- a precursor eg, carbonate, nitrate, etc.
- a precursor that can be converted into these components by heating is used, and these are converted into oxides. It can also be obtained by preparing a glass raw material by mixing to a predetermined ratio, melting the glass raw material into a glass, and then performing a heat treatment (crystallization treatment) under the same conditions.
- the crystallization of the glass does not proceed sufficiently, and the degree of crystallization may be reduced.
- a high coefficient of thermal expansion is not preferred in that the formation of a crystalline phase (such as garnite or willemite) is likely to be caused, which may increase the coefficient of thermal expansion of the glass and lower the heat resistance.
- the crystallized glass of the present invention obtained as described above has high heat resistance, has a low melting point and good meltability, and has a long-term It has excellent crystal stability and exhibits characteristic physical properties such that volume shrinkage is extremely small even when exposed to high temperatures for a long time.
- FIG. 2 shows that the crystallized glass of the present invention was kept at 600 ° C., 650 ° C., 700 ° C., and 750 ° C. for 20 hours each, and the volume expansion rate measured over time was measured. It is a graph showing a significant change.
- the crystallized glass of the present invention has an expansion coefficient (volume expansion) with the temperature rise until the temperature of the glass reaches the holding temperature. After the temperature reached the holding temperature, a substantially constant expansion rate (volume) was maintained, and even after 20 hours, the expansion rate (volume) hardly changed.
- the cause of the lithia-based crystallized glass exhibiting such behavior is that the crystal phase changes with time by being maintained under high-temperature conditions. Specifically, i) increase in density due to grain growth (volume shrinkage), ii) crystallization from
- the reflector base is made of lithia-based crystallized glass
- the crystal grains grow and the volume shrinks due to long-term use, and the shape of the reflector base may change.
- Such a shape change is not preferable because it causes a decrease in reflection characteristics and a shift of a light-converging point.
- the crystallized glass of the present invention unlike the lithia-based crystallized glass, has few such defects, and can withstand a long-term use of 5000 to 10,000 hours under a high temperature condition of 600 ° C or higher. It is preferred as a constituent material of a reflector base requiring durability. In view of the fact that light source lamps used for lighting devices and projector light sources have recently been increased in output and brightness, and the reflector base has been exposed to higher temperatures, the crystallization of the present invention has been considered. It goes without saying that glass is a very useful material!
- the crystallized glass of the present invention is suitably used as a constituent material of a reflector base constituting a reflector for reflecting light of a light source lamp, particularly, a reflector base of a lighting device or a projector light source. Is what you can do.
- the reflector base is a member on which a concave surface for arranging a reflection film is formed.
- the shape of the concave surface is not particularly limited as long as desired reflection characteristics can be obtained when the reflective film is arranged.
- it is often configured as a rotating quadratic surface (for example, a parabolic surface or an elliptical surface), and among them, it is preferable to configure an elliptical surface having excellent light-collecting efficiency of reflected light.
- the configuration of the portion other than the concave surface is not particularly limited, and various configurations are used depending on the purpose.
- a configuration such as the reflector base 10 shown in Fig. 4 is used. Is mentioned.
- the reflector base 10 shown in FIG. 4 also has two partial forces, a bowl-shaped part 14 and a neck part 16.
- the boundary between the bowl-shaped portion 14 and the neck portion 16 has a constricted shape, and a constricted portion 15 is formed.
- a concave surface 12 for arranging a reflective film is formed in the bowl-shaped portion 14, and a neck portion 16 is provided on the bottom side of the concave surface 12 so as to be continuous with the bowl-shaped portion 14.
- An inner space 18 defined by the concave surface 12 is formed in the bowl-shaped portion 14, and a light source penetrating the inside of the neck portion 16 and opening into the inner space 18 of the bowl-shaped portion 14.
- a through hole 20 for arranging a lamp is formed.
- the reflector base as described above is manufactured by, for example, a method of press-molding a molten glass mass (called "gob") obtained by melting a glass raw material at a high temperature using a mold. be able to.
- a reflector base molding die 30 is used in which the ring 36 forms a body to form a cavity 33 for molding the reflector base 31.
- a reflector base can be formed by the following method. First, a gob 38 is supplied from a gob supply nozzle 35 ((a) in the figure), and the gob 38 is cut using a cutting blade 37 to thereby form the concave portion 32 of the mold 32. A certain amount of gob 38 is injected into a ((b) in the figure).
- the ring 36 is placed on the upper end surface of the mold 32, the core rod 34 is loosely inserted into the guide hole 36a of the ring 36, and then the core rod 34 is pressed downward by force ((c) in the figure). (E)).
- the core rod 34 is guided to the concave portion 32a of the mold 32, and the mold 32, the core rod 34, and the ring 36 are formed into a body to form the cavity 33 for molding the reflector base 31.
- the reflector base 31 can be formed ((f) in the figure).
- the outer shape of the reflector base 31 is formed by a mold 32 having a concave portion 32a of a complementary shape, while the inner space of the reflector base 31 has a convex portion 34a of a complementary shape.
- Most of the core rod 34 is formed by the core rod 34.
- the core rod 34 is first pulled up.
- the reflector base 31 is held down by the ring 36, the reflector base 31 is held inside the mold 32 which cannot be pulled up together with the core rod 34.
- the ring 36 is lifted up to separate the mold, and the reflector base 31 as a molded body is taken out of the mold 32.
- the reflector base 31 as a molded body can be obtained.
- the reflector base body obtained as described above penetrates the lower end side of the neck portion 16 by machining or the like to form a through-hole for disposing a light source lamp.
- a reflective mirror can be formed by arranging reflective film 22 so as to cover concave surface 12.
- the configuration of the reflective film is not particularly limited as long as desired reflective characteristics can be obtained.
- a high refractive index substance such as titania (TiO 2) and a low refractive index substance such as silica (SiO 2)
- an alternate multilayer film or the like can be suitably used.
- a conventionally known film forming method can be used.
- a high-refractive-index material and a low-refractive-index material are alternately laminated using a conventionally known film forming method (for example, a PVD method, a CVD method, a sputtering method, etc.).
- the film may be formed as follows.
- a light source lamp 24 such as an ultra-high pressure mercury lamp is loaded into a through hole 20 for disposing a light source lamp, and the light source lamp 24 is fixed to a fixing material 26 such as heat-resistant cement. And the opening of the internal space 18 is covered with a glass protection plate 28 (about 4 to 5 mm thick). ) To form a light emitting device.
- the protective plate 28 is also provided with a reason that when the light source lamp is damaged due to the elapse of the service life, the fragments are prevented from being diffused.
- the crystallized glass of the present invention is embedded in a main body having a concave surface for disposing a reflective film, and embedded in the main body. It is also preferable to use it as a constituent material of a reflecting mirror base having a metal net formed as described above. That is, like a reflector base 50 shown in FIGS. 7A to 7C, a main body 17 made of the crystallized glass of the present invention and having a concave surface 12 serving as a reflection surface, and a main body 17 thereof It is preferable to include a metal net 52 buried in the inside.
- a characteristic configuration of the above-described reflector base 50 is that a metal net 52 is embedded inside the main body of the reflector base 50.
- the net-like body 52 is provided for the purpose of preventing the fragments from being diffused when the reflector base itself breaks due to the elapse of the service life.
- Such a reflector base is preferable because it can improve safety when the light emitting device is used and can avoid damage to other devices (for example, a liquid crystal projector or the like) attached thereto.
- the reticulated body 52 needs to be embedded inside the main body 17 of the reflector base 50. 1S
- the embedding position is not particularly limited. Therefore, the concave surface 12 is usually buried so that at least a part of the concave surface 12 is covered along the concave surface 12 if it is appropriately arranged so as to meet the above purpose.
- the reticulated body 52 needs to be disposed so as to cover the concave surface 12 of the main body 17 along the concave surface 12, but there is no particular limitation on the arrangement position of the reticulated body 52 except that.
- FIG. 7 (c) when the mesh 52 is arranged so as to cover the entire concave surface 12, it is preferable in that the net 52 has a high scattering prevention effect. It is not necessary for the mesh 52 to be placed so as to enclose the body.
- FIGS. 7A and 7B the effect of the present invention can be obtained if at least a part of the concave surface 12 is covered by the mesh body 52.
- FIG. 7 (a) In the case where the main body also has two partial forces of the bowl-shaped portion 14 and the neck portion 16 as in the reflector base 50 shown in FIG. Above, the border between the two The fin 15 is vulnerable to thermal stress and is easily damaged. Therefore, as shown in FIG. 7 (a), the effect can be sufficiently exerted by disposing the net-like body 52 at least in the vicinity of the constricted portion 15. Also, as in the reflector base 50 shown in FIGS. 7A to 7C, the net-like body 52 may be continuously arranged from the bowl-shaped part 14 to the neck part 16 through the constricted part 15. preferable.
- the mesh body is embedded inside the main body of the reflector base, it comes into contact with a high-temperature gob during the manufacturing process of the reflector base. Therefore, in order to manufacture a reflector base in an air atmosphere without requiring a nitrogen purge or the like, it is preferable to select a material having excellent oxidation resistance. Further, since the reflector base is used under high-temperature conditions, it is preferable to select a material having a similar thermal expansion coefficient to that of the crystallized glass constituting the main body, a high Young's modulus, and excellent extensibility. ⁇ ⁇ .
- the reticulated body is made of a metal having at least one selected from the group consisting of nickel, cobalt, stainless steel, and kovar as a main component.
- the "principal constituent component” is intended to mean that all of the reticulated body is constituted by the above-mentioned metal force, and it is sufficient if the net-like body is mainly constituted by the above-mentioned metal force. Specifically, it means that at least 30% by mass of the metal constituting the network is the above-mentioned metal.
- the reflector body is subjected to a high-temperature heat treatment (crystallization treatment) after its molding, it is preferable to select a material that can promote the crystallization.
- the reticulated body is made of a metal mainly composed of at least one selected from the group consisting of gold, platinum, silver, and copper. Since these metals can serve as crystal nuclei of glass, they are preferable in that crystallization of glass can be promoted and crystals can be refined. The same effect can be obtained when the net has a surface coating made of the above metal.
- the network must have a network structure, but the other configuration may be determined as appropriate in consideration of the properties of the crystallized glass, the size of the reflector base, the effect of preventing fragments from diffusing, and the like. Just fine.
- a mesh shape such as a square, a rhombus, and a turtle-shape can be adopted as the mesh shape, and a mesh having a mesh size of about 3 to 10 mm can be suitably used.
- the mesh is composed of metal wires with a diameter of about 0.1-1. Omm ⁇ , but in some cases, it is composed of metal foil with the same width! , You can.
- the reflector base in which the net-like body is buried as described above can be manufactured by a method according to the method of manufacturing a reflector base having a general configuration shown in FIG. That is, as shown in FIG. 8, a gob 38 may be formed by press molding using a reflector base molding die 30 having a mold 32, a core rod 34, and a ring 36.
- This manufacturing method is the same as the manufacturing method shown in FIG. 5 except that the mesh body 52 is set in advance in the concave portion 32a of the mold 32 before the injection of the gob 38 ((a) in the figure).
- the reflector base 50 in which the net 52 is embedded can be obtained ((b)-(g) in the figure).
- crystallized glass of the present invention will be specifically described with reference to examples, but the crystallized glass of the present invention is not limited to these examples.
- the crystallized glasses of the examples and comparative examples were evaluated for the four items of heat resistance, crystallinity, meltability, and devitrification, and comprehensive evaluation was performed based on these evaluations. Heat resistance, crystallinity, meltability, and devitrification were evaluated by the following methods.
- crystallinity For the evaluation of crystallinity, “ ⁇ ” indicates that the minimum temperature at which the crystallized glass can crystallize is less than 850 ° C, “ ⁇ ” indicates that the temperature is 850-900 ° C, and “ ⁇ ” indicates that it exceeds 900 ° C. "X"
- meltability is as follows: “ ⁇ ” when the crystallized glass has a melting temperature of less than 1500 ° C, “ ⁇ ” when it is between 1500 and 1530 ° C, and “X” when it exceeds 1530 ° C. It was described as
- the devitrification was evaluated based on the frequency of occurrence of the devitrification phenomenon before the glass material of the crystallized glass was melted into molten glass and formed into the shape of the reflector base.
- the symbol ⁇ indicates that there was no devitrification phenomenon at all, and the case that less than two samples had devitrification phenomenon.
- “ ⁇ ”, “ ⁇ ” indicates that the number of samples in which devitrification occurred was 5 or less, and “X” indicates that the number of samples in which devitrification occurred was 6 or more.
- a glass raw material is prepared by mixing the main components, nucleating agent, and modifying components shown in Table 3 in the ratios shown in Table 3, and the glass raw material is melted into glass, and then 875 ° C or 900 ° C. At 4 o'clock During this time, heat treatment (crystallization treatment) was performed to obtain crystallized glass of Example 18 and Comparative Example 14. Table 4 shows the results of evaluating the heat resistance, crystallinity, and meltability of these crystallized glasses.
- a glass raw material was prepared by mixing the main components, nucleating agent, and modifying components shown in Table 5 in the ratios shown in Table 5, and the glass raw material was melted into glass, and then 825 ° C and 850 ° C. Heat treatment (crystallization treatment) was performed at 875 ° C. or 900 ° C. for 4 hours to obtain a crystallized glass of Examples 9-119.
- Table 6 shows the results of evaluating the heat resistance, crystallinity, and meltability of these crystallized glasses.
- Main component nucleating agent force 'Las refining agent modifying component crystallized force' overall whole in Figure 1 the main component Las Zr0 2 Sb 2 0 3 P 2 0 5 Li 2 0 Na 2 0 ⁇ 2 ⁇ Cs 2 0 6 entire component
- Example 9 (VII) 100 5 0.5 ⁇ 0.5 ⁇ ⁇ ⁇ 0.5 106.0
- Example 10 (VII) 100 5 0.5 ⁇ ⁇ 0.5 ⁇ ⁇ 0.5 106.0
- Example 11 (I) 100 5 0.5-0.5 ⁇ ⁇ ⁇ 0.5 106.0
- Example 12 (I) 100 5 0.5 ⁇ ⁇ 0.5 ⁇ ⁇ 0.5 106.0
- Example 13 (I) 100 5 0.5 ⁇ ⁇ 0.5 ⁇ 0.5 106.0
- Example 14 (I) 100 5 0.5 ⁇ ⁇ ⁇ 0.5 0.5 106.0
- Example 15 (I) 100 5 0.5 ⁇ ⁇ 0.3 ().
- Example 16 (I) 100 5 0.5 1 0.3 0.4 0.6 ⁇ 2.3 107.8
- Example 17 (I) 100 5 0.5 1 0.45 0.6 0.9 ⁇ 2.95 108.45
- Example 18 (I) 100 5 0.5 1 0.6 0.8 1.2 ⁇ 3.6 109.1
- Example 19 (I) 100 5 0.5 1 0.75 1 1.5 ⁇ 4.25 109.75
- Example 9 ----18.2---12.3 -12.5 -11.1 ⁇ ⁇ ⁇ ⁇ Example 10-one---4.5 4.6 5.1 ⁇ ⁇ ⁇ ⁇ Example 11 -5.4 -4.8 -4.6 -4.2 -4.0 -3.9 5.1 3.5- ⁇ ⁇ ⁇ ⁇ Example 12 22.3 Unavailable-6.3 5.8 6.1 28.4 26.5- ⁇ ⁇ ⁇ ⁇ Example 13 29.2 Unavailable-7.9 8.1-24.1 24.7 ⁇ ⁇ ⁇ ⁇ Example U 19.6 Unavailable--2.7- 0.9 0.5 -2.9 -2.0- ⁇ ⁇ ⁇ ⁇ Example 15 24.8 Unavailable-4.1 4.9 7.1 2.6 3.4 5.0 ⁇ ⁇ ⁇ ⁇ Example 16 25.0 Unavailable-7.6 8.0 10.1 5.4 5.7 6.6 ⁇ ⁇ ⁇ ⁇ Example ⁇ 19.3 21.1 28.0 11.5 12.3 19.1 ⁇ ⁇ - ⁇ ⁇ ⁇ Example 18 15.5 16.9 23.6 9.9 11.6 17.5- ⁇ - ⁇ ⁇ ⁇ Example 19 16.8 18.
- Example 11 in which the main component composition ratio is the symbol (I) in FIG. Crystallized glass had better crystallinity.
- the crystallized glass of Examples 11 to 19 in which the main component composition ratio is indicated by the symbol (I) in FIG. the crystallized glass of Examples 11, 14, 15, and 16 containing lithium oxide and cesium oxide as modifying components was used.
- the crystallized glass had better crystallinity as compared with the crystallized glasses of Examples 12 and 13 containing only sodium acid and potassium acid.
- the crystallized glass of Examples 17-19 in which the total amount of the modifying components (six components) specified in the present invention exceeds 2.5 parts by mass is excellent in meltability in addition to this. The results were very good.
- a glass raw material was prepared by mixing the main components, nucleating agent, and modifying components shown in Table 7 in the ratios shown in Table 7, and the glass raw material was melted to obtain glass, and then 875 ° C or 900 ° C. Heat treatment (crystallization treatment) was performed for 4 hours to obtain a crystallized glass of Comparative Examples 5-10.
- Table 8 shows the results of evaluating the heat resistance, crystallinity, and meltability of these crystallized glasses.
- a glass raw material was prepared by mixing the main components, nucleating agent, and modifying components shown in Table 9 in the ratios shown in Table 9, and the glass raw material was melted into glass, and then 800 ° C, 825 ° C Alternatively, heat treatment (crystallization treatment) was performed at 850 ° C. for 4 hours to obtain a crystallized glass of Examples 20 to 29.
- Table 10 shows the results of evaluating the heat resistance, crystallinity, and meltability of these crystallized glasses.
- Example 20 36.6 Uncalculated ⁇ 15.3 16.8 25.1- ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ Example 21 18.2 19.8 22.7 12.6 13.2 19.5- ⁇ ⁇ ⁇ ⁇ ⁇ Example 22 30.2 Uncalculated ⁇ 14.0 15.3 21.8- ⁇ - ⁇ ⁇ ⁇ ⁇ Example 23 35.0 Calculation impossible-16.6 18.1 26.9--- ⁇ ⁇ ⁇ ⁇ Example 24 1--15.7 16.3 25.1 15.1 15.7 24.3 ⁇ ⁇ ⁇ Example 25---14.7 15.4 22.8 14.1 15.5 21.3 ⁇ ⁇ ⁇ ⁇ Example 26---29.7 Calculation not possible-10.6 12.2- ⁇ ⁇ ⁇ ⁇ Example 27------14.8 16.3 23.8 ⁇ ⁇ ⁇ ⁇ Example 28---13.5 14.6 ⁇ 13.9 14.6 21.7 ⁇ ⁇ ⁇ ⁇ Example 29---12.5 13.0 19.8 13.0 14.4 19.8 Is shown.
- a glass raw material was prepared by mixing the main components, nucleating agent, and modifying components shown in Table 11 at the ratios shown in Table 11, and the glass raw material was melted to obtain a glass.
- a heat treatment crystallized glasses of Examples 30 to 43 were obtained.
- Table 12 shows the results of evaluating the heat resistance, crystallinity, and meltability of these crystallized glasses.
- Example 30 (I ) 100 4 0.5 1 0.1 0.1 0.6 0.8 1.2 3.8 108.3 Example 31 (0 100 4 0.5 1 0.3 0.3 0.6 0.8 1.2 4.2 108.7 Example 32 (0 100 4 0.5 1 0.5 0.5 0.6 0.8 1.2 4.6 109.1 Example 33 (I) 100 5 0.5 1 0.1 0.1 0.6 0.8 1.2 3.8 109.3 Example 34 (I) 100 5 0.5 1 0.2 0.2 0.6 0.8 1.2 4.0 109.5 Example 35 (I) 100 5 0.5 1 0.3 0.3 0.6 0.8 1.2 4.2 109.7 Example 36 (I ) 100 5 0.5 1 0.3 0.3 0.6 0.8 1.2 4.2 109.7 Example 36 (I ) 100 5 0.5 1 0.5 0.5 0.6 0.8 1.2 4.6 110.1 Example 37 (I) 100 5 0.5 1 0.5 1 0.5 1 0.5 1 0.5 0.6 0.8 1.2 4.6 110.1 Example 37 (I) 100 5 0.5 1 0.5 1 0.5 1 0.5 1
- Table 9 As shown in Table 12, the crystallized glass of Examples 21, 24 to 43 containing the oxidized niobate or tantalum oxide in addition to the alkali metal oxidized product as the modifying component was heat resistant. All of the properties, crystallinity and meltability were excellent, and extremely good results were shown. Also, The crystallized glasses of Examples 20 and 23 containing vanadium oxide or molybdenum oxide in addition to the alkali metal oxide also showed good results, but Examples 21 and 24-43 which showed extremely good results. As a result, the crystallinity was slightly inferior to that of the crystallized glass.
- a glass raw material was prepared by mixing the main components, nucleating agent, and modifying components shown in Table 13 in the ratios shown in Table 13, and the glass raw material was melted to obtain glass at 800 ° C or 825 ° C.
- a heat treatment crystallized glasses of Examples 44 to 50 and Comparative Examples 11 to 13 were obtained.
- Table 14 shows the results of evaluating the heat resistance, crystallinity, meltability, and devitrification of these crystallized glasses.
- Example 44 100 4-0.5 1 0.3 0.2 0.6 0.9 1.2 4.2 108.7
- Example 45 (I) 100 4 0.5 0.5 1 0.3 0.2 0.6 0.9 1.2 4.2 109.2
- Example 46 (I) 100 4 1 0.5 1 0.3 0.2 0.6 0.9 1.2 4.2 109.7
- Example 47 (I) 100 4 1.5 0.5 1 0.3 0.2 0.6 0.9 1.2 4.2 110.2
- Example 48 (I) 100 4 2 0.5 1 0.3 0.2 0.6 0.9 1.2 4.2 110.7
- Example 49 (I) 100 3 1.5 0.5 1 0.3 0.2 0.6 0.9 1.2 4.2 109.2
- Example 50 (I) 100 3 2 0.5 1 0.3 0.2 0.6 0.9 1.2 4.2 109.7 Compar
- Example 44 17.2 18.6 28.4 Qu 15.4 16.3 22.3 Qu ⁇ ⁇ ⁇ ⁇ ⁇ Example 45----13.3 14.8 21.6- ⁇ ⁇ ⁇ ⁇ ⁇ Example 46-1--16.1 18.6 24.8- ⁇ ⁇ ⁇ Example 47-1--15.0 16.9 22.9 1 ⁇ ⁇ ⁇ ⁇ ⁇ Example 48- ⁇ --13.8 16.1 21.8- ⁇ ⁇ ⁇ ⁇ ⁇ Example 49-- ⁇ 1 17.6 20.5 27.7- ⁇ ⁇ ⁇ ⁇ ⁇ Example 50 9.9 10.5 15.0-14.5 17.0 22.3 Pe (Qu) ⁇ ⁇ ⁇ ⁇ ⁇ Comparative Example 11 34.9 39.0 Uncalculated-7.8 7.9 11.4 Qu (Ga, Wi) ⁇ ⁇ ⁇ ⁇ ⁇ Comparative Example 12 32.5 34.7 43.7-34.8 36.4 41.8 Qu (Ga .Wi) ⁇ ⁇ ⁇ ⁇ Comparative Example 13 36.4 38.7-1 33.6 35.0-Qu (Ga.Wi) ⁇ ⁇ ⁇
- the crystallized glass of Example 44 containing only 4 parts by mass of zirconia as a nucleating agent was excellent in all of heat resistance, crystallinity, and melting property. 17--19, 21, 24--43 Forces that show very good results as well as the glass-ceramics. When their devitrification properties were evaluated, in some samples the zirconia as a nucleating agent was re-used. A devitrification phenomenon caused by the crystals was observed.
- Example 49 in which the content of zirconia as a nucleating agent was reduced to 3 parts by mass, and instead, 1.5 parts by mass of tin dioxide as a nucleating agent was included. Improvement in devitrification was observed, and the crystallinity was reduced. That is, the crystallized glass of Example 49 was able to suppress the recrystallization of zirconia in the stage of melting and forming the glass raw material while maintaining good crystallinity.
- the content of zirconia as a nucleating agent was reduced to 3 parts by mass, and instead, 2 parts by mass of tin dioxide as a nucleating agent was included, so that the crystallized glass of Example 50 was devitrified. Was remarkably improved, and the crystallinity was not reduced. That is, the crystallized glass of Example 50 was able to effectively suppress the recrystallization of zirconia in the stage of melting and forming the glass raw material while maintaining good crystallinity.
- the main crystal phase is a zinc betalite solid solution, it exhibited excellent heat resistance comparable to a lithia-based crystallized glass having a small coefficient of thermal expansion.
- the evaluation target was the crystallized glass of Example 50, a commercially available lithium-based crystallized glass having a ⁇ -spodumene solid solution and a ⁇ -eucryptite solid solution as a crystal phase (referred to as “Comparative Example 14”).
- the crystallized glass of Comparative Example 14 had the composition shown in Table 15. The results are shown in FIGS.
- the crystallized glass of Example 50 has an increased coefficient of expansion (volume expansion) with the temperature increase until the temperature of the glass reaches the holding temperature.
- volume expansion coefficient of expansion
- a substantially constant expansion rate (volume) was maintained, and even after 20 hours, the expansion rate (volume) hardly changed.
- the crystallized glass of Example 50 had excellent crystal stability over time under high-temperature conditions, and had extremely small volume shrinkage even when exposed to high temperatures for a long time.
- the crystallized glass of Comparative Example 14 turned over after the temperature of the glass reached the holding temperature, and the expansion rate (volume) reached the maximum value. Expansion coefficient decreases ( (The volume decreased). This behavior tended to become more pronounced as the holding temperature increased. That is, the crystallized glass of Comparative Example 14 caused volume contraction when exposed to a high temperature for a long time. Specifically, in the crystallized glass of Example 50, the volume shrinkage after 20 hours at 750 ° C. was 0% by volume, whereas the crystallized glass of Comparative Example 14 was 0.5% by volume. The volume shrinkage was observed.
- the oxidized zinc-alumina-silica-based crystallized glass of the present invention is suitably used as a reflector base constituting a reflector for reflecting light of a light source lamp, in particular, a reflector base of a lighting device or a projector light source. Can be.
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP04773289A EP1688399A4 (en) | 2003-09-19 | 2004-09-17 | CRYSTALLIZED GLASS BASED ON ZINC-ALUMINA SILICA OXIDE AND REFLECTIVE MIRROR SUBSTRATE USING THE GLASS |
JP2005514064A JPWO2005028388A1 (ja) | 2003-09-19 | 2004-09-17 | 酸化亜鉛−アルミナ−シリカ系結晶化ガラス |
US11/150,906 US7169476B2 (en) | 2003-09-19 | 2005-06-13 | Zinc oxide-alumina-silica-based crystallized glass |
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JP2003-328537 | 2003-09-19 | ||
JP2003328537 | 2003-09-19 | ||
JP2003357975 | 2003-10-17 | ||
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US11/150,906 Continuation US7169476B2 (en) | 2003-09-19 | 2005-06-13 | Zinc oxide-alumina-silica-based crystallized glass |
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US (1) | US7169476B2 (ja) |
EP (1) | EP1688399A4 (ja) |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2006056745A (ja) * | 2004-08-20 | 2006-03-02 | Nippon Electric Glass Co Ltd | 結晶化ガラス及びその製造方法 |
CN111533443A (zh) * | 2020-05-27 | 2020-08-14 | 成都光明光电股份有限公司 | 光学玻璃 |
WO2021199631A1 (ja) * | 2020-03-30 | 2021-10-07 | Agc株式会社 | 結晶化ガラス、高周波用基板および結晶化ガラスの製造方法 |
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KR101466930B1 (ko) * | 2007-12-21 | 2014-12-01 | 재단법인 포항산업과학연구원 | Ta205계 유전체 나노 분말 및 그의 제조방법 |
FI20106181A0 (fi) * | 2010-11-11 | 2010-11-11 | Pekka Laukkanen | Menetelmä substraatin muodostamiseksi ja substraatti |
WO2018071360A1 (en) | 2016-10-12 | 2018-04-19 | Corning Incorporated | Glass ceramics |
CN115484330A (zh) * | 2021-05-31 | 2022-12-16 | 华为技术有限公司 | 玻璃陶瓷及制备方法、玻璃陶瓷盖板、电子设备 |
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- 2004-09-17 JP JP2005514064A patent/JPWO2005028388A1/ja active Pending
- 2004-09-17 WO PCT/JP2004/013670 patent/WO2005028388A1/ja active Application Filing
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2005
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JP2003051210A (ja) * | 2001-07-24 | 2003-02-21 | Three M Innovative Properties Co | 可溶性ポリイミドを用いたリフレクタ、それを備える放電ランプ及び画像投影装置 |
JP7092527B2 (ja) * | 2018-03-15 | 2022-06-28 | 本田技研工業株式会社 | 輸送機器およびその走行制御方法 |
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JP2006056745A (ja) * | 2004-08-20 | 2006-03-02 | Nippon Electric Glass Co Ltd | 結晶化ガラス及びその製造方法 |
JP4702696B2 (ja) * | 2004-08-20 | 2011-06-15 | 日本電気硝子株式会社 | 結晶化ガラスの使用方法及び結晶化ガラスの製造方法 |
WO2021199631A1 (ja) * | 2020-03-30 | 2021-10-07 | Agc株式会社 | 結晶化ガラス、高周波用基板および結晶化ガラスの製造方法 |
CN111533443A (zh) * | 2020-05-27 | 2020-08-14 | 成都光明光电股份有限公司 | 光学玻璃 |
Also Published As
Publication number | Publication date |
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US7169476B2 (en) | 2007-01-30 |
US20050255984A1 (en) | 2005-11-17 |
JPWO2005028388A1 (ja) | 2006-11-30 |
EP1688399A1 (en) | 2006-08-09 |
EP1688399A4 (en) | 2010-06-02 |
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