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Glass composition and process for producing glass composition

A technology of glass composition and manufacturing method, applied in optics, instruments, nonlinear optics, etc., can solve problems such as destroying the performance of liquid crystal elements

Inactive Publication Date: 2008-08-13
AVANSTRATE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when NaCl is used, Na ions are eluted from the glass after the liquid crystal display device is assembled, and the eluted amount may damage the performance of the liquid crystal element.

Method used

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  • Glass composition and process for producing glass composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～12 and comparative example 1～3

[0093] In Examples 1 to 12 and Comparative Examples 1 to 3, the clarification effect of containing a small amount of alkali metal oxide and Cl was confirmed.

[0094] The glass raw material batches shown in Tables 1A and 1B (hereinafter, sometimes referred to as batches) were blended. As general glass raw materials, silica, diboron trioxide, alumina, basic magnesium carbonate, calcium carbonate, strontium carbonate, and barium carbonate are used. As the Cl source, potassium chloride, calcium chloride, sodium chloride, lithium chloride, etc. are used.

[0095] [Table 1A]

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example 1

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Example 2

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Example 3

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Example 4

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Example 5

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Example 6

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example 1

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Example 2

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Than

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[

g

/

Batch

]

Silicon oxide

59.0

59.0

59.0

59.6

59.4

58.9

59.0

59.9

Boron trioxide

8....

Embodiment 13～21 and comparative example 4～6

[0116] In Examples 13-21 and Comparative Examples 4-6, the preferred composition range of the glass composition was confirmed, and the suitability of glass substrates for information display devices was considered, including comprehensive evaluation of glass transition temperature, thermal expansion coefficient, and bubble state. Glass composition.

[0117] Using the same raw materials as in Examples 1 to 12 and Comparative Examples 1 to 3, the batch materials shown in Table 3 were respectively blended.

[0118] [table 3]

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Example 13

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Example 14

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Example 15

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Example 16

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Example 17

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Example 19

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Example 21

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Example 4

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Example 5

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Example 6

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[

g

/

Batch

]

Silicon oxide

54.91

59.22

54.33

55.27

52...

Embodiment 22～24 and comparative example 7

[0130] In Examples 22-24 and Comparative Example 7, it was confirmed that the glass composition can also contain a small amount of As 2 O 5 Or Sb 2 O 3 .

[0131] Using the same raw materials as in Examples 1 to 12 and Comparative Examples 1 to 3, the batch materials shown in Table 5 were respectively blended. Among them, as As 2 O 5 As the raw material, arsenic pentoxide is used as Sb 2 O 3 The raw material uses antimony trioxide.

[0132] [table 5]

[0133] Implement

Example 22

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Example 23

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Example 7

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g

/

Batch

]

Silicon oxide

54.42

54.42

54.39

54.53

Boron trioxide

8.48

8.48

8.48

8.49

Alumina

16.29

16.29

16.28

16.32

Magnesium carbonate

2.30

2.30

2.30

2.31

Calcium carbonate

12.90

12.90

12.90

12.92

...

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PUM

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Abstract

The present invention provides a glass composition that uses a small amount of arsenic oxide or antimony oxide, which has a large environmental load, and has few residual bubbles. The glass composition contains, in mass %, SiO2: 40-70%, B2O3: 5-20%, Al2O3: 10-25%, MgO: 0-10%, CaO: 0-20%, SrO: 0-20 %, BaO: 0-10%, Li2O: 0-0.5%, Na2O: 0-1.0%, K2O: 0-1.5%, Cl: more than 0% and 1.5% or less, Li2O+Na2O+K2O is more than 0.06% scope. The glass composition can preferably be produced by using chloride as part of the glass raw material.

Description

Technical field [0001] The invention relates to a glass composition and a method for manufacturing the glass composition, in particular to an aluminum borosilicate glass composition. Background technique [0002] At present, an alkali-free borosilicate glass composition has been used for the glass composition used in the substrate of the information display device, especially the active matrix liquid crystal display device. As a representative example of this alkali-free borosilicate glass, No. 7059 of Corning Corporation in the U.S. can be cited. [0003] Usually, in the manufacturing process of a glass composition, the thing which does not have bubbles etc. in a glass composition is called clarification. In addition, in order to clarify the glass melt, it is generally known to add a clarifying agent. As this clarifying agent, arsenic oxide, antimony oxide, fluoride, etc. are known. However, the reduction of the use of these components with high environmental load is becoming a ...

Claims

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Application Information

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IPC IPC(8): C03C3/11G02F1/1333G09F9/30
Inventor 岸本正一新居田治树小山昭浩长岛廉仁
Owner AVANSTRATE INC
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