CN109775963A - A kind of melted defecation method of alkali-free glass decompression - Google Patents
A kind of melted defecation method of alkali-free glass decompression Download PDFInfo
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- CN109775963A CN109775963A CN201811617824.8A CN201811617824A CN109775963A CN 109775963 A CN109775963 A CN 109775963A CN 201811617824 A CN201811617824 A CN 201811617824A CN 109775963 A CN109775963 A CN 109775963A
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Abstract
It is depressurized the present invention relates to a kind of alkali-free glass and defecation method is melted, ingredient including existing alkali-free glass batch, heating be melted, clarification, iron plate cast molding, annealing, cutting and polishing process；It is characterized by: melting furnace is first carried out reduced pressure treatment, vacuum degree is in 500Pa-100000Pa, used time 0.5-1 hour in control furnace before heating is melted；Clarification is passed through air, regulating stove inside and outside air pressure balance into melting furnace after terminating.Advantages of the present invention: batch decompression is melted, decompression is clarified, realize the uniformity and completeness reacted between batch, reach optimal be melted, clarify, homo-effect, acquisition entrapped air pockets quantity is few, bubble diameter is small, the good high-quality alkali-free glass of homogenieity.
Description
Technical field
The invention belongs to alkali-free glass preparation fields, are related to a kind of melted defecation method of alkali-free glass decompression.
Background technique
The glass substrate of the displays such as liquid crystal display device is required to be substantially free of alkali metal, due to alkali-free glass
Alkali metal compound is substantially free of in glass raw material, and alumina content is high, causes glass smelting, clarifying process than conventional sodium
Calcium-silicate glass difficulty is much larger, and the glass sample bubble that common normal pressure is melted, clarification obtains is more.
In glass melting process, bubble is a kind of most commonly seen defect, it will affect the appearance of glassware, penetrates
Rate, mechanical strength and hardness etc., when alkali-free glass substrate remaining has certain amount microbubble and bad homogenieity, and then can not
Meet the glass substrate requirement of the displays such as liquid crystal display device.
Summary of the invention
The purpose of the present invention is to solve alkali-free glasss to be melted, bubble is more in clarifying process, influences asking for glass quality
Topic provides a kind of melted defecation method of alkali-free glass decompression.
To achieve the goals above, The technical solution adopted by the invention is as follows:
A kind of alkali-free glass, which depressurizes, is melted defecation method, ingredient, heating including existing alkali-free glass batch be melted, clarification,
Iron plate cast molding, annealing, cutting and polishing process；It is characterized by: first melting furnace is depressurized before heating is melted
It handles, vacuum degree is in 500Pa-100000Pa, used time 0.5-1 hour in control furnace；Clarification is passed through sky into melting furnace after terminating
Gas, regulating stove inside and outside air pressure balance.
Further, in the furnace vacuum degree can also for 500-1000 Pa, 1000-10000 Pa, 10000-50000Pa,
50000-100000Pa。
Further, the batch of the alkali-free glass comprises the following raw materials by weight percent: the SiO of 57-66%2、
The Al of 14-18%2O3, 0.5-1% ZrO2, 6-11% B2O3, 3-6% MgO, 2-4% CaO, 5-11% SrO, with 1-5%
MoO3, the SrF of 1-5%2, the CaCl of 1-5%2。
Advantages of the present invention: batch decompression being melted, decompression is clarified, realize between batch the uniformity reacted with it is complete
Quan Xing reaches optimal and is melted, clarifies, homo-effect, and acquisition entrapped air pockets quantity is few, bubble diameter is small, homogenieity is good
High-quality alkali-free glass.
Specific embodiment
Embodiment 1
By percentage to the quality, following alkali-free glass batch: 59% SiO is selected2, 15.2% Al2O3, 0.6% ZrO2、7%
B2O3, 4% MgO, 3% CaO, 6% SrO, with 1.2% MoO3, 2% SrF2, 2% CaCl2；It is carried out according to this each component
Melting furnace is first vacuumized (reduced pressure treatment) by ingredient, when pressure is 0.8 standard atmospheric pressure in furnace, by following molten
System carries out being melted for glass: rising to 1100 DEG C, the used time 2 hours by room temperature；1640 DEG C are risen to by 1100 DEG C, the used time 3 hours,
And keep the temperature clarification 2 hours；Clarification is passed through air, regulating stove inside and outside air pressure balance, blow-on into melting furnace after terminating, then passes through iron
Plate casting method of forming cast molding, then annealed, cutting obtain glass substrate with polishing process.
Embodiment 2
By percentage to the quality, following alkali-free glass batch: 59% SiO is selected2, 15.2% Al2O3, 0.6% ZrO2、7%
B2O3, 4% MgO, 3% CaO, 6% SrO, with 1.2% MoO3, 2% SrF2, 2% CaCl2；It is carried out according to this each component
Melting furnace is first vacuumized (reduced pressure treatment) by ingredient, when pressure is 0.7 standard atmospheric pressure in furnace, by following molten
System carries out being melted for glass: rising to 1100 DEG C, the used time 2 hours by room temperature；1640 DEG C are risen to by 1100 DEG C, the used time 3 hours,
And keep the temperature clarification 2 hours；Clarification is passed through air, regulating stove inside and outside air pressure balance, blow-on into melting furnace after terminating, then passes through iron
Plate casting method of forming cast molding, then annealed, cutting obtain glass substrate with polishing process.
Embodiment 3
By percentage to the quality, following alkali-free glass batch: 59% SiO is selected2, 15.2% Al2O3, 0.6% ZrO2、7%
B2O3, 4% MgO, 3% CaO, 6% SrO, with 1.2% MoO3, 2% SrF2, 2% CaCl2；It is carried out according to this each component
Melting furnace is first vacuumized (reduced pressure treatment) by ingredient, when pressure is 0.5 standard atmospheric pressure in furnace, by following molten
The molten system of system progress glass: 1100 DEG C, the used time 2 hours are risen to by room temperature；1640 DEG C are risen to by 1100 DEG C, the used time 3 hours,
And keep the temperature clarification 2 hours；Clarification is passed through air, regulating stove inside and outside air pressure balance, blow-on into melting furnace after terminating, then passes through iron
Plate casting method of forming cast molding, then annealed, cutting obtain glass substrate with polishing process.
Comparative example 1
By percentage to the quality, following alkali-free glass batch: 59% SiO is selected2, 15.2% Al2O3, 0.6% ZrO2、7%
B2O3, 4% MgO, 3% CaO, 6% SrO, with 1.2% MoO3, 2% SrF2, 2% CaCl2；It is carried out according to this each component
Ingredient is carried out the molten system of glass by following melting system: under normal pressure state, rising to 1100 DEG C, the used time 2 hours by room temperature；By
1100 DEG C rise to 1640 DEG C, and the used time 3 hours, and keep the temperature clarification 2 hours；Blow-on, then pass through the cast molding of iron plate casting moulding,
Then annealed, cutting obtains glass substrate with polishing process.
Above three embodiments are matched from a comparative example using identical oxide and different melting systems, difference
It is in embodiment 1, embodiment 2 and the embodiment 3 melted, way of clarification according to present invention decompression have chosen different respectively
Vacuum degree: vacuum (decompression) state of 0.8 standard atmospheric pressure, 0.7 standard atmospheric pressure and 0.5 standard atmospheric pressure；Comparative example 1
It being melted using the existing common normal pressure of alkali-free glass manufacturer, way of clarification, the number of bubbles of generation is more than the present invention,
As shown in table 1.It can be seen that under decompression state proposed by the present invention be melted, way of clarification can ground reduce glass remaining
Number of bubbles and reduction bubble diameter, obtain the good high-quality alkali-free glass of homogenieity.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form；Appoint
What those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the side of the disclosure above
Method and technology contents make many possible changes and modifications to technical solution of the present invention, or are revised as the equivalent reality of equivalent variations
Apply example.Therefore, anything that does not depart from the technical scheme of the invention according to the technical essence of the invention do above embodiments
Any simple modification, equivalent replacement, equivalence changes and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (6)
1. a kind of alkali-free glass, which depressurizes, is melted defecation method, ingredient, heating including existing alkali-free glass batch are melted, are clear
Clearly, iron plate cast molding, annealing, cutting and polishing process；It is characterized by: first melting furnace is carried out before heating is melted
Reduced pressure treatment, control furnace in vacuum degree in 500Pa-100000Pa, used time 0.5-1 hour；Clarification is led to after terminating into melting furnace
Enter air, regulating stove inside and outside air pressure balance.
2. a kind of alkali-free glass, which depressurizes, according to claim 1 is melted defecation method, it is characterised in that: the alkali-free glass
Batch comprises the following raw materials by weight percent: the SiO of 57-66%2, 14-18% Al2O3, 0.5-1% ZrO2、6-11%
B2O3, 3-6% MgO, 2-4% CaO, 5-11% SrO, with the MoO of 1-5%3, the SrF of 1-5%2, the CaCl of 1-5%2。
3. a kind of alkali-free glass, which depressurizes, according to claim 1 is melted defecation method, it is characterised in that: vacuum degree in the furnace
For 500-1000 Pa.
4. a kind of alkali-free glass, which depressurizes, according to claim 1 is melted defecation method, it is characterised in that: vacuum degree in the furnace
For 1000-10000 Pa.
5. a kind of alkali-free glass, which depressurizes, according to claim 1 is melted defecation method, it is characterised in that: vacuum degree in the furnace
For 10000-50000Pa.
6. a kind of alkali-free glass, which depressurizes, according to claim 1 is melted defecation method, it is characterised in that: vacuum degree in the furnace
For 50000-100000Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811617824.8A CN109775963B (en) | 2018-12-28 | 2018-12-28 | Decompression melting clarification method for alkali-free glass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811617824.8A CN109775963B (en) | 2018-12-28 | 2018-12-28 | Decompression melting clarification method for alkali-free glass |
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| CN109775963A true CN109775963A (en) | 2019-05-21 |
| CN109775963B CN109775963B (en) | 2020-12-15 |
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| CN201186895Y (en) * | 2008-03-13 | 2009-01-28 | 中国建材国际工程有限公司 | Pressure reducing clarifier suitable for glass melting furnace |
| CN102666408A (en) * | 2009-12-25 | 2012-09-12 | 旭硝子株式会社 | Method for vacuum-degassing molten glass and process for producing glass product |
| CN102858698A (en) * | 2010-04-23 | 2013-01-02 | 旭硝子株式会社 | Vacuum degassing method for molten glass |
| CN103332857A (en) * | 2013-06-09 | 2013-10-02 | 彩虹显示器件股份有限公司 | Alkali-free aluminum borosilicate glass clarifier and preparation method thereof |
| CN103476715A (en) * | 2011-04-12 | 2013-12-25 | 旭硝子株式会社 | Method for vacuum-degassing of molten glass, device for vacuum-degassing of molten glass, method for producing molten glass, device for producing molten glass, method for producing article made of glass, and device for producing article made of glass |
| JP2016005999A (en) * | 2014-05-27 | 2016-01-14 | 日本電気硝子株式会社 | Glass |
-
2018
- 2018-12-28 CN CN201811617824.8A patent/CN109775963B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201186895Y (en) * | 2008-03-13 | 2009-01-28 | 中国建材国际工程有限公司 | Pressure reducing clarifier suitable for glass melting furnace |
| CN102666408A (en) * | 2009-12-25 | 2012-09-12 | 旭硝子株式会社 | Method for vacuum-degassing molten glass and process for producing glass product |
| CN102858698A (en) * | 2010-04-23 | 2013-01-02 | 旭硝子株式会社 | Vacuum degassing method for molten glass |
| CN103476715A (en) * | 2011-04-12 | 2013-12-25 | 旭硝子株式会社 | Method for vacuum-degassing of molten glass, device for vacuum-degassing of molten glass, method for producing molten glass, device for producing molten glass, method for producing article made of glass, and device for producing article made of glass |
| CN103332857A (en) * | 2013-06-09 | 2013-10-02 | 彩虹显示器件股份有限公司 | Alkali-free aluminum borosilicate glass clarifier and preparation method thereof |
| JP2016005999A (en) * | 2014-05-27 | 2016-01-14 | 日本電気硝子株式会社 | Glass |
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