CN113045201A - Application of glass composition with high alumina content and low crystallization speed - Google Patents
Application of glass composition with high alumina content and low crystallization speed Download PDFInfo
- Publication number
- CN113045201A CN113045201A CN202011525038.2A CN202011525038A CN113045201A CN 113045201 A CN113045201 A CN 113045201A CN 202011525038 A CN202011525038 A CN 202011525038A CN 113045201 A CN113045201 A CN 113045201A
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- Prior art keywords
- glass
- content
- crucible
- alumina
- crystallization
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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
- C03C4/00—Compositions for glass with special properties
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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
- C03B5/18—Stirring devices; Homogenisation
-
- 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
- C03B5/225—Refining
-
- 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
- C03C3/087—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 containing calcium oxide, e.g. common sheet or container glass
Abstract
The invention provides an application of a glass composition with high alumina content and low crystallization speed, the glass comprises the components of 20-38.5% of alumina, 4-40% of magnesia, 4-23% of silica, 1.6-9.5 times of calcium oxide and 0.8-2.5 times of calcium oxide in percentage by weight; the temperature of the glass is 1280-1600 ℃ when the log P (LogP) is 2.0; after the glass in the crucible is melted in the box-type electric melting furnace, the temperature is reduced to 800 ℃ from 1300 ℃, then a furnace door of the box-type electric melting furnace is opened, the glass in the crucible is taken out, and the glass can be used in a glass sample in the crucible without generating crystallization.
Description
Technical Field
The invention relates to the field of new materials, in particular to the application field of glass composition materials with high alumina content and low crystallization speed.
Background
Technical background 1:
teaching materials at higher education; material basic data of research departments; the basic theory of materials of various Chinese and international specialties . (such as articles published by chemical publishers of china) and (glass dictionaries) have affirmed many of the fields of professional technology in industry (traditional glass technology theory), such as:
there are a number of great significance (theory of glass technology). Such as (alumina can improve the chemical stability, thermal stability, mechanical strength, hardness and other properties of the glass), etc. (theory of glass technology).
Therefore, in recent decades, the glass enterprises in various countries want to increase the chemical stability, thermal stability, mechanical strength, hardness, and other key properties of glass products by increasing the alumina content of the glass.
Technical background 2:
in the theory of the existing traditional glass technology, the following exists: too high an alumina content, above 20% would result in too short a glass frit to allow the glass to be shaped as desired). There are: the technical theory difficulty that the content of the alumina is too high, and the glass crystallization can be generated after the content of the alumina exceeds 20 percent, so that qualified glass products can not be produced.
Background of the art 3:
products such as corning glass company, schottky glass company or sagoan glass company of the top grade glass enterprise in the world can only control the content of alumina to be about 20 percent, otherwise, the material property of the glass is too short to enable the glass to be formed according to requirements). When the content of the aluminum oxide exceeds 20%, glass crystallization is generated, and the material implementation technology limit of the world-oriented glass technology for producing qualified glass products cannot be realized.
4 of technical background:
the comparison document CN 105645758A discloses the technical proposal of the inventor, the content of alumina is 0.01-39%, and the content of magnesia and silica are proportional relation of the content of calcium oxide and the proportional relation of the content of calcium oxide; discloses a viscosity of 102At 1390 ℃ in Pa.s. 102(Pa.s) this equates to a viscosity of 1390 ℃ at a log of viscosity (LogP) of 1.0. This is a very low viscosity. In the technical schemes of a plurality of patents before 2019 of the inventor, the viscosity is too low, so that the adopted technical schemes, particularly when the content of alumina is high, cannot form large-scale production.
Since the glass devitrification is generated after the alumina content exceeds 20%, the material implementation technology limit of the world-oriented glass technology which can not produce qualified glass products is limited.
The invention [ application of a glass composition with high alumina content and low crystallization speed ]: 1. the novel properties of low glass crystallization strength and speed are discovered when the content of alumina exceeds 20 percent; 2. viscosity temperature properties were found to be more suitable for mass production [ at alumina contents above 20%).
Breaking the technical limit that the glass enterprises in the world [ the leading technology ] and the glass production of high alumina content in the prior patent technology are too strong in devitrification strength and too short in material property, particularly in the material property in the forming stage, the glass cannot be formed according to the requirement, and devitrification of the glass can be generated. The invention discloses application of a glass composition with high alumina content and low crystallization speed, which has low glass crystallization strength and speed, can be used for melting glass in a crucible in a box-type electric melting furnace, cooling the glass to the minimum 800 ℃ from 1300 ℃ for 2-3 h (120) within 180 min, opening a furnace door of the box-type electric melting furnace, taking out the glass in the crucible, and can be used in a glass sample in the crucible without crystallization. Therefore, the glass does not have new crystallization property when the time of the large production forming process stage in the float process is 4-5 minutes and is dozens of times longer. The method can overcome the difficulty that various prior arts can generate crystallization in large-scale production when the content of alumina exceeds 20 percent, and has unexpected technical effect.
In order to solve the above problems, the present invention proposes the use of a glass composition having a high alumina content and a low crystallization rate.
Disclosure of Invention
The invention is realized by the following technical scheme:
the invention provides an application of a glass composition with high alumina content and low crystallization speed, which comprises the components of 20-38.5% of alumina, 4-23% of magnesia, 1.6-9.5 times of silica and 0.8-2.5 times of magnesia, wherein the weight percentage of the components is calculated according to the weight percentage;
the temperature of the glass is 1280-1600 ℃ when the log P (LogP) is 2.0;
the glass is put in a box-type electric melting furnace, after the glass in a crucible is melted, the temperature is reduced to 800 ℃ from 1300 ℃ after 2-3 hours, then a furnace door of the box-type electric melting furnace is opened, the glass in the crucible is taken out, and the glass in the crucible can be made into a glass sample in the crucible without crystallization.
Further, the use of a glass composition having a high alumina content and a low devitrification rate according to claim 1 wherein: the content of alumina is 30-38.5%, and the temperature of the glass is 1300-1430 ℃ when the log P value is 2.0.
The invention has the beneficial effects that:
the invention [ application of a glass composition with high alumina content and low crystallization speed ]: 1. the novel properties of low glass crystallization strength and speed are discovered when the content of alumina exceeds 20 percent; 2. viscosity temperature properties were found to be more suitable for mass production [ at alumina contents above 20%).
Breaking the technical limit that the glass enterprises in the world [ the leading technology ] and the glass production of high alumina content in the prior patent technology are too strong in devitrification strength and too short in material property, particularly in the material property in the forming stage, the glass cannot be formed according to the requirement, and devitrification of the glass can be generated. The invention discloses application of a glass composition with high alumina content and low crystallization speed, which has low glass crystallization strength and speed, can be used for melting glass in a crucible in a box-type electric melting furnace, cooling the glass to the minimum 800 ℃ from 1300 ℃ for 2-3 h (120) within 180 min, opening a furnace door of the box-type electric melting furnace, taking out the glass in the crucible, and can be used in a glass sample in the crucible without crystallization. Therefore, the glass does not have new crystallization property when the time of the large production forming process stage in the float process is 4-5 minutes and is dozens of times longer. The method can overcome the difficulty that various prior arts can generate crystallization in large-scale production when the content of alumina exceeds 20 percent, and has unexpected technical effect.
Detailed Description
Application example 1 of a glass composition of the present invention having a high alumina content and a low crystallization rate:
the content of alumina in the glass is 21 percent and the content of magnesia in the glass is 5.3 percent in percentage by weight; the content of silicon oxide is 63%; the content of calcium oxide is 8 percent; 2.7% of boron oxide; the content of the silicon oxide is 8 times of that of the calcium oxide; the content of calcium oxide was 1.5 times the content of magnesium oxide.
The temperature of the glass at a log p of 2.0 is 1450 ℃;
the glass has low crystallization strength and speed, and can be cooled to 750 ℃ in 2-3 hours from 1300 ℃ after the glass in the crucible is melted in the box-type electric melting furnace, then the furnace door of the box-type electric melting furnace is opened, the glass in the crucible is taken out, the glass in the crucible can be made into a glass sample in the crucible, and no crystallization is generated.
Application example 2 of a glass composition of the present invention having a high alumina content and a low crystallization rate:
the content of alumina in the glass is 37.6 percent and the content of magnesia in the glass is 7.4 percent in percentage by weight; the content of silicon oxide is 35%; the content of calcium oxide is 17%; 3% of boron oxide; the content of the silicon oxide is 2.0 times of that of the calcium oxide; the content of calcium oxide is 2.3 times of that of magnesium oxide;
the temperature of the glass is 1520 ℃ when the log P (LogP) of the viscosity is 2.0;
the glass has low crystallization strength and speed, and can be cooled to 800 ℃ for 2-3 hours from 1300 ℃ after the glass in the crucible is melted in the box-type electric melting furnace, then the furnace door of the box-type electric melting furnace is opened, the glass in the crucible is taken out, the glass in the crucible can be made into a glass sample in the crucible, and no crystallization is generated.
Application example 3 of a glass composition of the present invention having a high alumina content and a low crystallization rate:
the content of alumina in the glass is 27 percent and the content of magnesia in the glass is 10 percent in percentage by weight; the content of silicon oxide was 45%; the content of calcium oxide is 13 percent; the boron oxide content is 5%; the content of silicon oxide is 3.5 times of the content of calcium oxide; the content of calcium oxide is 1.3 times of that of magnesium oxide;
the temperature of the glass is 1520 ℃ when the log P (LogP) of the viscosity is 2.0;
the glass has low crystallization strength and speed, and can be cooled to 800 ℃ for 2-3 hours from 1300 ℃ after the glass in the crucible is melted in the box-type electric melting furnace, then the furnace door of the box-type electric melting furnace is opened, the glass in the crucible is taken out, the glass in the crucible can be made into a glass sample in the crucible, and no crystallization is generated.
In the embodiments described above, the glass composition with high alumina content and low devitrification rate is used at a temperature different from the log viscosity (LogP) of 2.0 in many background art techniques, but has good glass properties, as will be appreciated by those skilled in the art, which can meet the normal production requirements of glass products.
In the above-described embodiments, the present invention [ application of a glass composition having a high alumina content and a low crystallization rate ]: 1. the novel properties of low glass crystallization strength and speed are discovered when the content of alumina exceeds 20 percent; 2. viscosity temperature properties were found to be more suitable for mass production [ at alumina contents above 20%).
Breaking the technical limit that the glass enterprises in the world [ the leading technology ] and the glass production of high alumina content in the prior patent technology are too strong in devitrification strength and too short in material property, particularly in the material property in the forming stage, the glass cannot be formed according to the requirement, and devitrification of the glass can be generated.
The invention discloses application of a glass composition with high alumina content and low crystallization speed, which has low glass crystallization strength and speed, can be used for melting glass in a crucible in a box-type electric melting furnace, cooling the glass to the minimum 800 ℃ from 1300 ℃ for 2-3 h (120) within 180 min, opening a furnace door of the box-type electric melting furnace, taking out the glass in the crucible, and can be used in a glass sample in the crucible without crystallization. Therefore, the glass does not have new crystallization property when the time of the large production forming process stage in the float process is 4-5 minutes and is dozens of times longer. The method can overcome the difficulty that various prior arts can generate crystallization in large-scale production when the content of alumina exceeds 20 percent, and has unexpected technical effect.
Of course, the present invention may have other embodiments, and based on the embodiments, those skilled in the art can obtain other embodiments without any creative effort, and all of them are within the protection scope of the present invention.
Claims (2)
1. The glass composition with high alumina content and low crystallization speed is used, and the glass comprises 20-38.5 wt% of alumina, 4-23 wt% of magnesia, 1.6-9.5 times of silica and 0.8-2.5 times of magnesia;
the temperature of the glass is 1280-1600 ℃ when the log P (LogP) is 2.0;
after the glass in the crucible is melted in the box-type electric melting furnace, the temperature is reduced to 800 ℃ from 1300 ℃, then a furnace door of the box-type electric melting furnace is opened, the glass in the crucible is taken out, and the glass can be used in a glass sample in the crucible without generating crystallization.
2. Use of a glass composition having a high alumina content and a low devitrification rate according to claim 1 wherein: the content of alumina is 30-38.5%, and the temperature of the glass is 1300-1430 ℃ when the log P value is 2.0.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911361922.4A CN111253065A (en) | 2019-12-26 | 2019-12-26 | Application of glass composition with high softening point |
| CN2019113619224 | 2019-12-26 | ||
| CN202010353622.8A CN111348829A (en) | 2020-04-29 | 2020-04-29 | Application of high-softening-point fireproof high-temperature glass composition |
| CN2020103536228 | 2020-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113045201A true CN113045201A (en) | 2021-06-29 |
Family
ID=76508122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011525038.2A Pending CN113045201A (en) | 2019-12-26 | 2020-12-21 | Application of glass composition with high alumina content and low crystallization speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113045201A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005306719A (en) * | 2004-03-22 | 2005-11-04 | Nippon Electric Glass Co Ltd | Glass for display substrate |
| US20080227615A1 (en) * | 2007-03-15 | 2008-09-18 | Mcginnis Peter B | Low viscosity E-glass composition enabling the use of platinum and rhodium free bushings |
| CN104692652A (en) * | 2013-12-06 | 2015-06-10 | 杨德宁 | Glassware produced by cooling portion crystallization prevention method |
| CN105060720A (en) * | 2014-03-08 | 2015-11-18 | 曹小松 | High-strength floor tile for building |
| CN105645758A (en) * | 2014-12-01 | 2016-06-08 | 杨德宁 | Application of fireproof and explosion-proof flat glass with low difference of thermal expansion coefficient in high temperature region, low crystallization speed, and ultrahigh strength |
| CN106698923A (en) * | 2015-11-16 | 2017-05-24 | 杨德宁 | Application of high temperature-resistant anti-explosion glass vessel or glass daily article with low difference value of high-temperature area thermal expansion coefficient and low crystallization speed |
| CN110156335A (en) * | 2019-05-27 | 2019-08-23 | 中国建筑材料科学研究总院有限公司 | A kind of middle numerical aperture fiber optical glass and its preparation method and application |
-
2020
- 2020-12-21 CN CN202011525038.2A patent/CN113045201A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005306719A (en) * | 2004-03-22 | 2005-11-04 | Nippon Electric Glass Co Ltd | Glass for display substrate |
| US20080227615A1 (en) * | 2007-03-15 | 2008-09-18 | Mcginnis Peter B | Low viscosity E-glass composition enabling the use of platinum and rhodium free bushings |
| CN104692652A (en) * | 2013-12-06 | 2015-06-10 | 杨德宁 | Glassware produced by cooling portion crystallization prevention method |
| CN105060720A (en) * | 2014-03-08 | 2015-11-18 | 曹小松 | High-strength floor tile for building |
| CN105645758A (en) * | 2014-12-01 | 2016-06-08 | 杨德宁 | Application of fireproof and explosion-proof flat glass with low difference of thermal expansion coefficient in high temperature region, low crystallization speed, and ultrahigh strength |
| CN106698923A (en) * | 2015-11-16 | 2017-05-24 | 杨德宁 | Application of high temperature-resistant anti-explosion glass vessel or glass daily article with low difference value of high-temperature area thermal expansion coefficient and low crystallization speed |
| CN110156335A (en) * | 2019-05-27 | 2019-08-23 | 中国建筑材料科学研究总院有限公司 | A kind of middle numerical aperture fiber optical glass and its preparation method and application |
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Application publication date: 20210629 |