Non-alkali glass composition of high specific modulus value and its use

A glass composition and glass technology, applied in the field of alkali-free glass composition, can solve the problems of high glass density, unfavorable glass Young's modulus, and unfavorable light weight of flat-panel display panels, etc.

Active Publication Date: 2005-08-03
HENAN ANCAI HI-TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent whose publication number is CN 1328531A discloses a kind of alkali-free glass not containing BaO, SiO 2 If the content is more than 65 mol%, the glass melting temperature is too high, and the MgO content is low at the same time, which is not conducive to improving the Young's modulus of the glass; the Chinese patent with the publication number CN 1445187A discloses a La 2 o 3 Alkali-free glass, because the glass contains a large amount of La 2 o 3 , the glass density is relatively high, which is not conducive to the light weight of the flat panel; US 2004/0127342 A1 discloses a kind of alkali-free glass, the glass on

Method used

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  • Non-alkali glass composition of high specific modulus value and its use
  • Non-alkali glass composition of high specific modulus value and its use
  • Non-alkali glass composition of high specific modulus value and its use

Examples

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Embodiment 1-33

[0040] In Examples 1-33, glass compositions were prepared according to the composition shown in Table 1-4, and their properties were tested. Tables 1 to 4 summarize the composition of the glass of the present invention, and some fining agents in the melting process are not listed in the table.

[0041] The glass of Example 1-33 is composed of ingredients as shown in Table 1-4. Each pair weighs 400g. The glass ingredients are placed in a platinum rhodium crucible and melted in a high-temperature silicon-molybdenum rod electric furnace for 1.5 hours. The melting temperature 1520-1600°C. Table 1 to Table 4 also lists the glass properties. Glass properties include:

[0042] (1) 20-300℃ average thermal expansion coefficient α 20 / 300 [10 -7 / K];

[0043] (2) Density ρ[g / cm 3 ];

[0044] (3) Young's modulus E[GPa];

[0045] (4) Poisson's ratio v,

[0046] (5) Refractive index n D ;

[0047] (6) The calculated specific modulus value E / ρ[GPa / (g.cm -3 )];

[0048] (7) Strain point T s [℃], ...

Embodiment 34-66

[0068] Using the glass composition of Example 1-33, at 1520 to 1650°C (the melting temperature of each glass is based on the T of Example 1-33 m The temperature is determined) melting limit for 2 hours, molding at 1200-1300 ℃ (each glass molding temperature according to the T of Example 1-33 wThe temperature is determined), and the glass plate is made according to the ordinary float process. The size of the glass plate is 680×880mm, and the thickness is 0.7mm and 1.1mm respectively. Two long sides and one short side of each glass plate were supported. At room temperature and normal conditions, after 0.5 hours, the maximum sag of the unsupported short sides are shown in Table 5. It can be seen from the table that the amount of glass sag is inversely proportional to the specific modulus of the glass.

[0069] Example number

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Abstract

The present invention provides a kind of non-alkali glass composition, its preparation process, the panel glass of the glass composition and its preparation process. The glass composition consists of (in the molar portions of oxides): SiO2 59-65, B2O3 6-11, Al2O3 8-16, MgO 2-10, CaO 3-11, and SrO 0.2-6 except alkali metal impurities, with MgO + CaO + SrO being 10-19, (MgO + CaO + SrO)/Al2O3 being 0.85-1.5, and (0.3MgO + 0.7CaO + 0.7SrO)/Al2O3 being 0.45-0.85.

Description

Technical field [0001] The present invention relates to an alkali-free glass composition and its application. More specifically, it relates to a glass composition with low expansion coefficient, high strain point, high chemical stability, high specific modulus value (sag resistance) and melting Low temperature aluminoborosilicate glass composition and its application. Background of the invention [0002] So far, glass plates have been widely used in flat-panel displays, such as liquid crystal displays, EL displays, etc. To make various films, circuits and patterns on one surface of this type of glass plate, first, sputtering, chemical vapor deposition ( CVD) and other technologies form transparent conductive films, insulating films, semiconductor (polysilicon, amorphous silicon, etc.) films and metal films on the surface of the substrate glass, and then use photo-etching techniques to form various circuits and patterns. In the film deposition and photo-etc...

Claims

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Application Information

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IPC IPC(8): C03C3/091
CPCC03C3/091
Inventor 李留恩贾伟曹国喜姜淑凤苍利民孟军恒
Owner HENAN ANCAI HI-TECH
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