WO2017110799A1 - Verre ayant des bulles fines et procédé de fabrication associé - Google Patents

Verre ayant des bulles fines et procédé de fabrication associé Download PDF

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Publication number
WO2017110799A1
WO2017110799A1 PCT/JP2016/087925 JP2016087925W WO2017110799A1 WO 2017110799 A1 WO2017110799 A1 WO 2017110799A1 JP 2016087925 W JP2016087925 W JP 2016087925W WO 2017110799 A1 WO2017110799 A1 WO 2017110799A1
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Prior art keywords
glass
bubbles
less
cross
bubble diameter
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PCT/JP2016/087925
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English (en)
Japanese (ja)
Inventor
長嶋　達雄
学 西沢
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旭硝子株式会社
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Priority to JP2017558150A priority Critical patent/JPWO2017110799A1/ja
Publication of WO2017110799A1 publication Critical patent/WO2017110799A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • 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
    • C03C11/00—Multi-cellular glass ; Porous or hollow glass or glass particles
    • 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
    • C03C3/12—Silica-free oxide glass compositions
    • C03C3/16—Silica-free oxide glass compositions containing phosphorus
    • C03C3/17—Silica-free oxide glass compositions containing phosphorus containing aluminium or beryllium

Definitions

  • the present invention relates to glass containing minute bubbles and a method for producing the same.
  • Bubbles (bubbles) in the glass are usually recognized as defects. Therefore, usually glass without bubbles is desired.
  • a glass such as porous glass and foamed glass in which pores and bubbles are present in the glass and a method for producing the same have also been proposed.
  • Patent Document 1 describes that porous glass having pores in glass can be obtained by subjecting borosilicate glass to phase separation and then acid treatment.
  • Patent Document 2 describes that after a foaming agent such as SiC is mixed into finely pulverized glass, they are molded and fired to obtain foamed glass.
  • the porous glass described in Patent Document 1 since the pores in the porous glass described in Patent Document 1 have a large aspect ratio, the porous glass has anisotropy. Therefore, when the porous glass is viewed from the outside, the pores are observed with the naked eye depending on the viewing direction. Moreover, since acid treatment is required to produce the porous glass, when a phase that elutes into the acid in the phase-separated glass elutes, it is necessary to use a large amount of acid and waste liquid treatment, It takes a long time to elute the phase that elutes in the acid, and there is a problem in terms of productivity.
  • the aspect ratio of the bubbles in the obtained foamed glass is approximately 1, but in the method for producing the foamed glass, it is difficult to control the bubble diameter and the bubble distribution. It is difficult to obtain a glass with good appearance that is not visually recognized.
  • an object of the present invention is to provide a glass having a good appearance from an arbitrary direction while containing bubbles, and a method for producing the same.
  • glass having good appearance means a glass in which bubbles are not visually recognized when observed with the naked eye from the outside.
  • the present invention is a glass containing bubbles, and when the cross section of the glass is observed, the number of the bubbles in the cross section is 1.0 ⁇ 10 2 pieces / mm 2 or more, and Provided is a glass having a bubble diameter of 50 ⁇ m or less and an aspect ratio of 1.25 or less.
  • the present invention also includes a melting step of melting glass while being pressurized to 0.2 to 100 MPa, a cooling step of cooling the melted glass, and a slow cooling step of slowly cooling the cooled glass A manufacturing method is also provided.
  • Bubbles having a bubble diameter of 50 ⁇ m or less and an aspect ratio of 1.25 or less, which are contained in the glass of the present invention, are minute bubbles that are not visible by observation with the naked eye from an arbitrary direction. Therefore, the glass of the present invention having the above-described configuration has good appearance, since bubbles are not visually recognized from any direction while containing bubbles.
  • the glass of the present invention has various properties such as lightness, heat insulation, sound insulation, electrical insulation, thermoelectric effect, light scattering controllability, etc. by appropriately adjusting the bubble diameter, aspect ratio and number of the bubbles. It can develop properties.
  • an optical element such as an optical element, an electrical element, a thermoelectric conversion element, an acoustic element, and a lightweight heat insulating material
  • the optical element include a wavelength selection filter, a light emitting element, and a solar battery
  • specific examples of the electric element include an insulator, a capacitor, and a secondary battery.
  • the glass of the present invention can be efficiently manufactured without requiring a complicated process.
  • FIG. 1 is a cross-sectional SEM image of glass according to Example 1 (Example).
  • FIG. 2 is a cross-sectional SEM image of the glass according to Example 2 (Example).
  • the glass of the present invention is a glass containing bubbles, and when the cross section of the glass is observed, the number of the bubbles in the cross section is 1.0 ⁇ 10 2 pieces / mm 2 or more, and The bubble diameter is 50 ⁇ m or less, and the aspect ratio is 1.25 or less.
  • bubbles having a bubble diameter of 50 ⁇ m or less and an aspect ratio of 1.25 or less may be referred to as “fine bubbles”.
  • the bubble diameter of the bubble in the present invention represents a bubble diameter read from an SEM image obtained by observing a cross section of the glass with a scanning electron microscope (SEM).
  • the aspect ratio of the bubble in the present invention is calculated as a major axis / minor axis by reading the major axis and minor axis of a bubble from an SEM image obtained by observing a cross section of the glass with a scanning electron microscope (SEM). Represents the value to be
  • Bubbles having a bubble diameter of 50 ⁇ m or less and an aspect ratio of 1.25 or less are not visually recognized when the glass is observed with the naked eye from an arbitrary direction.
  • the number of fine bubbles in the cross section is 1.0 ⁇ 10 2 / mm 2 or more, and the appearance from any direction is contained while containing bubbles. Is good.
  • bubble diameter, bubble aspect ratio, and number of bubbles are the pressure conditions during melting of the glass, melting temperature, blowing agent, atmosphere, and cooling rate during cooling when manufacturing the glass of the present invention. It can be adjusted by appropriately adjusting each condition such as a slow cooling condition.
  • the fine bubble has a bubble diameter of 50 ⁇ m or less, preferably 20 ⁇ m or less, more preferably 1 ⁇ m or less, and even more preferably 500 nm. Or less, particularly preferably 200 nm or less.
  • the lower limit of the bubble diameter of the fine bubble is not particularly limited, but is 1 nm or more, for example, from the viewpoint of various characteristics and bubble density.
  • the fine bubble has an aspect ratio of 1.25 or less, preferably 1.2 or less, more preferably 1.15, from the viewpoint of obtaining good appearance from any direction. Or less, more preferably 1.1 or less, or the fine bubble may be a perfect circle (aspect ratio is 1).
  • the number of fine bubbles in the cross section (hereinafter also referred to as bubble density) is 1.0 ⁇ 10 2 pieces / mm 2 or more, preferably 1.0 ⁇ 10 3 pieces / mm 2 or more, more preferably 5.0 ⁇ 10 5 pieces / mm 2 or more.
  • the upper limit of the said foam density is not specifically limited, From a viewpoint on manufacture, it is 1.0 * 10 ⁇ 12 > pieces / mm ⁇ 2 > or less, for example.
  • the glass of the present invention has various properties such as lightness, heat insulation, sound insulation, electrical insulation, thermoelectric effect, light scattering controllability, etc. by appropriately adjusting the bubble diameter, aspect ratio and number of fine bubbles. It can develop properties.
  • the number of bubbles in the cross section when the cross section of the glass is observed is 5.0 ⁇ 10 4 pieces / mm 2 or more, and the bubbles of the bubbles Glass having a diameter of 500 nm or less has a low mean thermal process, so that the glass has low thermal conductivity and high heat insulating properties.
  • the bubble diameter is 200 nm or less and the bubble density is 5.0 ⁇ 10 5 pieces / mm 2 or more, the bubble diameter is 100 nm or less and the bubble density is 1.0 ⁇ 10 6 pieces. / Mm 2 or more is more preferable.
  • the aspect ratio of the bubbles is within the above-described range.
  • the number of bubbles in the cross section when the cross section of the glass is observed is 2.0 ⁇ 10 2 pieces / mm 2 or more, and Glass having a bubble diameter of 20 ⁇ m or less has a high porosity, and thus has a low specific gravity and is lightweight.
  • the bubble diameter is 1 ⁇ m or less and the number of bubbles is 5.0 ⁇ 10 4 / mm 2 or more, the bubble diameter is 500 nm or less, and the bubble density is 2.0 ⁇ 10 5. It is more preferable that the number of particles / mm 2 or more.
  • it is desirable that the bubble diameter is small and the bubble density is large.
  • the bubble diameter works as a third power against the porosity, more bubbles are introduced as the bubble diameter becomes smaller. This is inefficient in terms of manufacturing.
  • the bubble diameter is 20 nm or more and the bubble density is 2.0 ⁇ 10 9 cells / mm 2 or less. In this aspect, the aspect ratio of the bubbles is within the above-described range.
  • the number of the bubbles in the cross section when the cross section of the glass is observed is 1.0 ⁇ 10 2 pieces / mm 2 or more, and Glass having a bubble diameter of 15 ⁇ m or less and an aspect ratio of 1.2 or less can increase scattering efficiency at a predetermined wavelength from ultraviolet light to infrared light depending on the bubble diameter. It is suitable as an optical element.
  • the bubble diameter is 10 ⁇ m or less
  • the aspect ratio is 1.1 or less
  • the bubble density is 2.0 ⁇ 10 2 pieces / mm 2 or more.
  • the bubble diameter is in the range of 100 to 550 nm and the bubble density is in the range of 2.0 ⁇ 10 4 to 1.0 ⁇ 10 6 pieces / mm 2 . You can choose from.
  • the bubble diameter is 7 ⁇ m or less and the bubble density is 2.0 ⁇ 10 2 pieces / mm 2 or more. It is preferable that
  • the glass of the present invention preferably contains no bubbles other than bubbles having a bubble diameter of 50 ⁇ m or less and an aspect ratio of 1.25 or less.
  • the bubbles may be visually recognized. As a result, the appearance of the glass may be deteriorated.
  • the kind of glass used for the glass of the present invention is not particularly limited, and can be appropriately selected and applied from various known glasses. Examples thereof include soda lime glass, aluminosilicate glass, borosilicate glass, phosphate glass, fluorophosphate glass, halide glass, and chalcogenite glass.
  • the shape of the glass of the present invention is not particularly limited, and can take various shapes such as a plate shape, a block shape, a tubular shape, and a fiber shape according to the application to be applied.
  • the glass of the present invention may be appropriately subjected to tempering treatment such as chemical tempering treatment and physical tempering treatment.
  • tempering treatment such as chemical tempering treatment and physical tempering treatment.
  • a publicly known method can be employed without particular limitation as the strengthening processing method.
  • the tempered glass subjected to the tempering treatment can be used for a light and highly insulated window glass, an automobile window glass and the like.
  • the glass production method of the present invention includes a melting step for melting glass while being pressurized to 0.2 to 100 MPa, a cooling step for cooling the melted glass, and a slow cooling step for gradually cooling the cooled glass. Is provided.
  • the glass manufacturing method of the present invention can be easily manufactured.
  • the present inventors are able to crush bubbles (especially fine bubbles) with a small bubble diameter generated in the molten glass by melting the glass while applying pressure at a predetermined pressure.
  • fine bubbles having a predetermined number of bubbles and a predetermined bubble diameter and a predetermined aspect ratio can be maintained and contained in the molten glass.
  • the glass production method of the present invention In the glass production method of the present invention, first, the glass is melted while being pressurized to 0.2 to 100 MPa. When the pressure during the melting step is 0.2 MPa or more, fine bubbles can be efficiently contained in the glass melt.
  • the pressure is preferably 0.3 MPa or more, and more preferably 0.5 MPa or more. On the other hand, if the pressure during the melting step is greater than 100 MPa, the pressure-resistant container at the time of production is limited, and the cost may be enormous.
  • the pressure is preferably 50 MPa or less, and more preferably 10 MPa or less.
  • the glass raw material is sealed in an appropriate container such as a quartz tube. At this time, it may be sealed while evacuating.
  • the pressure when evacuating at the time of sealing is, for example, 10 to 30 Pa.
  • the container enclosing the glass raw material is held for a predetermined time while being heated to a temperature higher than the melting temperature of the encapsulated glass raw material.
  • the holding time is, for example, 2 to 48 hours.
  • a glass raw material will be melt
  • fine bubbles are included in the melted glass.
  • the glass is melted by a general melting method in advance and cooled to prepare a cullet, and then the cullet is placed in a pressure vessel, and the temperature is raised and the glass reaches a melt, and then a desired gas is introduced and added. You may make it press.
  • a foaming agent having a desired high vapor pressure may be added.
  • Desired gases and foaming agents are, for example, soda lime glass, aluminosilicate glass, borosilicate glass, phosphate glass, etc., in the case of gas, oxygen, carbon dioxide, sulfuric acid gas, etc. Examples include salts, fluorides, and chlorides.
  • a foaming agent it is preferable to add in the range of 0.1 to 10% by mass with the total mass of glass being 100% by mass. More preferably, the content is 0.2 to 5% by mass, and still more preferably 0.5 to 3% by mass.
  • the melting temperature is not particularly limited, but is preferably in the range of 600 to 1700 ° C.
  • the upper limit temperature of the melting temperature is preferably not more than the heat resistant temperature of the container.
  • a quartz tube is used for the container, it is preferably 1000 ° C. or lower. More preferably, it is 950 degrees C or less, More preferably, it is 900 degrees C or less.
  • the melting temperature is preferably equal to or higher than the devitrification temperature of the glass.
  • a cooling step for cooling the melted glass containing fine bubbles is performed. Thereby, the melted glass is cooled and solidified in a state of enclosing the fine bubbles, and the fine bubbles are held inside the glass.
  • a known method can be appropriately adopted.
  • the cooling rate in the cooling step is not particularly limited, but the cooling rate is 100 ° C./min or more in order to cool and solidify the glass while maintaining the state in which the molten glass contains fine bubbles. It is preferably 300 ° C./min or more.
  • the upper limit of the cooling rate is not particularly limited, it is preferably 6000 ° C./min or less, more preferably 1000 ° C./min or less from the viewpoint of reducing the load on the melting equipment and the pressure vessel. .
  • a slow cooling step of slow cooling the glass is performed to remove the distortion of the glass.
  • the cooling rate in the slow cooling step is not particularly limited, but is preferably 100 ° C./min or less, more preferably 10 ° C./min or less, from the viewpoint of removing residual strain of glass and preventing breakage. It is.
  • the glass manufacturing method of the present invention may further include other steps in addition to the melting step, the cooling step, and the slow cooling step.
  • a forming step for forming the glass into a desired shape and a glass refining step may be appropriately provided.
  • a well-known method is employable suitably as a shaping
  • Examples 1 to 3 and 6 are Examples, Examples 4 and 7 are Comparative Examples, and Example 5 is a Reference Example.
  • Example 1 Glass raw materials were mixed so as to have a composition of Ge 4%, Sb 10%, and S 86% (hereinafter also referred to as glass composition 1) in terms of atomic% to obtain a 10 g raw material batch. Further, one end of a quartz tube having an inner diameter of 8 mm was heated and sealed with an oxyhydrogen burner to produce a quartz glass ampule, which was then washed with isopropyl alcohol (IPA) and dried at 600 ° C. under reduced pressure. Subsequently, the raw material batch was placed in a quartz glass ampule and pressed, and then the opening was heated with an oxyhydrogen burner while evacuating at 10 to 30 Pa to seal the quartz glass ampule.
  • IPA isopropyl alcohol
  • the quartz glass ampule in which the raw material batch is sealed is placed in a melting furnace that has been heated to 200 ° C. in advance, and the glass raw material is melted by raising the temperature to 800 ° C. at a temperature rising rate of 2 ° C./min. Retained.
  • the internal pressure in the quartz tube estimated from the vapor pressure curve of sulfur was about 8 MPa.
  • the sealed quartz glass ampule was allowed to cool to the atmosphere, whereby the molten glass in the quartz glass ampule was cooled and solidified.
  • the cooling rate was about 3000 ° C./min.
  • the sealed quartz glass ampule was placed in an electric furnace heated to 230 ° C., and slowly cooled to room temperature at a temperature lowering rate of ⁇ 0.5 ° C./min to produce the glass of Example 1.
  • the glass taken out from the sealed quartz glass ampule was cut and polished to prepare three plate-like glass samples having a thickness of about 1 mm. Further, the glass transition point Tg of the glass powder obtained by pulverizing a part of the glass after taking out the three plate-like glass samples is measured with a differential thermal analyzer (trade name: TG8110, manufactured by Rigaku Corporation). It was 225 degreeC when measured using.
  • Example 2 In Example 2, a quartz glass ampoule in which a raw material batch of glass raw materials is enclosed is placed in a melting furnace that has been heated to 200 ° C. in advance, and the temperature is raised to 700 ° C. at a rate of 2 ° C./min.
  • the glass of Example 2 was produced in the same manner as in Example 1 except that the glass raw material was dissolved and held for 2 hours.
  • the internal pressure in the quartz tube inferred from the vapor pressure curve of sulfur was about 3 MPa.
  • three plate-like glass samples having a thickness of about 1 mm were produced from the glass of Example 2 in the same manner as in Example 1.
  • the glass transition point Tg of the glass of Example 2 was measured in the same manner as in Example 1, it was 224 ° C.
  • glass composition 2 In terms of atomic%, P 14.3%, Mg 0.5%, Ca 0.5%, Sr 2.8%, Ba 8.2%, Li 16%, Al 7.2%, Y 0.5% 600 g of glass raw material was mixed so that the composition of O 32.8% and F 17.2% (hereinafter also referred to as glass composition 2) was obtained. After putting this in a platinum crucible, the glass raw material was melted by heating to 900 ° C. with an electric furnace, and the melt was quenched with a rotating roll to form a glass ribbon. The obtained glass ribbon was pulverized with a ball mill and passed through a sieve having a mesh with an opening of 150 ⁇ m to obtain glass powder. In addition, the glass transition point Tg of this glass powder was 372 degreeC.
  • the sealed glass glass ampule was allowed to cool to the atmosphere, whereby the molten glass in the quartz glass ampule was cooled and solidified.
  • the cooling rate was about 3000 ° C./min.
  • the sealed quartz glass ampule was placed in an electric furnace heated to 400 ° C., and slowly cooled to room temperature at a temperature decrease rate of ⁇ 1 ° C./min to produce the glass of Example 3.
  • three plate-like glass samples having a thickness of about 1 mm were produced from the glass of Example 3 in the same manner as in Example 1.
  • Example 4 200 g of the glass powder obtained in the same manner as in Example 3 was weighed and placed in a platinum crucible, and 2 g of BaF 2 was further added, and then the temperature was raised to 900 ° C. in an electric furnace to dissolve the glass powder and held for 30 minutes. . Next, after stirring for 10 minutes using a platinum stirrer at a rotational speed of 500 rpm, the platinum crucible is placed in an electric furnace heated to 400 ° C. and gradually cooled to room temperature at a temperature reduction rate of ⁇ 1 ° C./min. Cooled to produce the glass of Example 4. In addition, three plate-like glass samples having a thickness of about 1 mm were produced from the glass of Example 4 in the same manner as in Example 1.
  • Example 5 In the same manner as in Example 3, 300 g of a glass raw material was mixed and placed in a platinum crucible, and then heated to 900 ° C. in an electric furnace to dissolve the glass raw material and clarify for 1 hour. Next, the platinum crucible was placed in an electric furnace heated to 400 ° C. and slowly cooled to room temperature at a temperature decrease rate of ⁇ 1 ° C./min to produce the glass of Example 5. Further, three plate-like glass samples having a thickness of about 1 mm were produced from the glass of Example 5 in the same manner as in Example 1.
  • Example 6 10 g of the glass powder obtained in the same manner as in Example 3 was weighed, 0.1 g of BaF 2 and 0.25 g of Eu 2 O 3 were added, and the quartz glass ampoule similar to that in Example 1 was not evacuated. The glass powder was melted by sealing and heated to 800 ° C. at a rate of 2 ° C./min, and held for 1 hour. Here, the internal pressure in the quartz tube inferred from the critical pressure of F was about 5 MPa. Next, the sealed glass glass ampule was allowed to cool to the atmosphere, whereby the molten glass in the quartz glass ampule was cooled and solidified. The cooling rate was about 3000 ° C./min.
  • Example 6 the sealed quartz glass ampule was placed in an electric furnace heated to 400 ° C., and slowly cooled to room temperature at a temperature decrease rate of ⁇ 1 ° C./min to produce the glass of Example 6. Also, four plate-like glass samples having a thickness of about 1 mm were produced from the glass of Example 6 in the same manner as in Example 1.
  • Example 7 200 g of the glass powder obtained in the same manner as in Example 3 was weighed and placed in a platinum crucible, 2 g of BaF 2 and 5 g of Eu 2 O 3 were further added, and the temperature was raised to 800 ° C. in an electric furnace to obtain the glass powder. Dissolve and hold for 30 minutes. Next, after stirring for 10 minutes using a platinum stirrer at a rotational speed of 500 rpm, the platinum crucible is placed in an electric furnace heated to 400 ° C. and gradually cooled to room temperature at a temperature reduction rate of ⁇ 1 ° C./min. It cooled and produced the glass of Example 7. Also, four plate-like glass samples having a thickness of about 1 mm were produced from the glass of Example 7 in the same manner as in Example 1.
  • the aspect ratio was obtained by reading the major axis and minor axis of the bubbles from the SEM image and calculating the major axis / minor axis. The results are shown in Tables 1 and 2. Further, Tables 1 and 2 show whether or not bubbles are visually recognized when the glass is observed with the naked eye from an arbitrary direction.
  • FIG. 1 shows one of the SEM images of the surface of the plate-like glass sample obtained from the glass of Example 1.
  • FIG. 2 shows one of the SEM images of the surface of the plate-like glass sample obtained from the glass of Example 2.
  • the glass melt was pressurized by the increase in vapor pressure accompanying the temperature increase in the quartz sealed tube, and the fine density was obtained with a foam density of 2.5 ⁇ 10 4 pieces / mm 2 or more. A glass with bubbles was obtained. Moreover, from these results, it was shown that fine bubbles can be contained in glass by pressurizing the glass melt to 3 MPa or more regardless of the glass system. In the glasses of Examples 1 to 3, no bubbles were visually recognized when observed with the naked eye, and the glass had good appearance.
  • Example 4 was atmospheric pressure dissolution, and even when stirring and gas-liquid mixing at a rotational speed of 500 rpm, only bubbles having a small bubble density and a large bubble diameter were obtained. And when the glass of Example 4 was observed with the naked eye, bubbles were visually recognized and the appearance was inferior. In Example 5, bubbles were not observed by SEM observation of the plate-like glass sample.
  • the thermal conductivity decreases as the bubble diameter decreases and the bubble density increases.
  • the thermal conductivity (0.62 W / m ⁇ K) of the glass of Example 3 is the thermal conductivity (0. 72 W / m ⁇ K).
  • the thermal conductivity (0.71 W / m ⁇ K) of the glass of Example 5 in which bubbles were not observed is also an example.
  • the thermal conductivity (0.62 W / m ⁇ K) of the glass No. 3 was significantly low.
  • Example 6 the glass of Example 6 in which fine bubbles were contained at a bubble density of 2.5 ⁇ 10 4 pieces / mm 2 or more showed a large quantum conversion yield as compared with the glass of Example 7, It was confirmed that the fluorescent glass contributes to the improvement of characteristics.
  • the fine bubble glass of the present invention is obtained in the same manner as in the above examples.
  • the glass of the present invention has good appearance from any direction while containing bubbles.
  • the glass of the present invention has various properties such as lightness, heat insulation, sound insulation, electrical insulation, thermoelectric effect, light scattering controllability, etc. by appropriately adjusting the bubble diameter, aspect ratio and number of the bubbles. It can develop properties. Therefore, the application to various uses, such as an optical element, an electrical element, a thermoelectric conversion element, an acoustic element, and a lightweight heat insulating material, is expected.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
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  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
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Abstract

La présente invention concerne un verre ayant des bulles dans lequel, lorsqu'une section transversale du verre est visualisée, le nombre de bulles dans la section transversale est de 1,0 × 10²/mm² ou plus, un diamètre des bulles est 50 ìm ou moins et un rapport de longueur est inférieur ou égal à 1,25. Ce verre a un bon aspect externe depuis n'importe quelle direction, tout en ayant des bulles.
PCT/JP2016/087925 2015-12-24 2016-12-20 Verre ayant des bulles fines et procédé de fabrication associé WO2017110799A1 (fr)

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JP2017558150A JPWO2017110799A1 (ja) 2015-12-24 2016-12-20 微小な気泡を含有するガラス及びその製造方法

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JP2015-251367 2015-12-24
JP2015251367 2015-12-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021172232A1 (fr) * 2020-02-28 2021-09-02 Ａｇｃ株式会社 Verre de silice, dispositif à haute fréquence utilisant du verre de silice, et procédé de production de verre de silice

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552577A (en) * 1983-04-05 1985-11-12 Pedro B. Macedo Method of producing shaped foamed-glass articles
JPH08143329A (ja) * 1993-10-08 1996-06-04 Tosoh Corp 高純度不透明石英ガラス及びその製造方法並びにその 用途
JPH11209135A (ja) * 1998-01-27 1999-08-03 Tosoh Corp 透明部を有する不透明石英ガラスリングの製造方法
JP2010280523A (ja) * 2009-06-03 2010-12-16 Konica Minolta Opto Inc 蛍光体分散ガラスおよびその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552577A (en) * 1983-04-05 1985-11-12 Pedro B. Macedo Method of producing shaped foamed-glass articles
JPH08143329A (ja) * 1993-10-08 1996-06-04 Tosoh Corp 高純度不透明石英ガラス及びその製造方法並びにその 用途
JPH11209135A (ja) * 1998-01-27 1999-08-03 Tosoh Corp 透明部を有する不透明石英ガラスリングの製造方法
JP2010280523A (ja) * 2009-06-03 2010-12-16 Konica Minolta Opto Inc 蛍光体分散ガラスおよびその製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021172232A1 (fr) * 2020-02-28 2021-09-02 Ａｇｃ株式会社 Verre de silice, dispositif à haute fréquence utilisant du verre de silice, et procédé de production de verre de silice

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