Preparation method for milk-white and heat-resistant microcrystalline glass with low dilatability

A glass-ceramic and milky-white technology, which is applied in the field of preparation of low-expansion milky-white heat-resistant glass-ceramic, can solve the problems of high viscosity of glass liquid, short material property, high melting temperature, etc., achieve low production cost and reduce production difficulty , The effect of uncomplicated process

Inactive Publication Date: 2017-10-20
JIANGSU JIELONG GLASSWARE TECH
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Problems solved by technology

[0007] The technical problem to be solved in the present invention is for Li 2 O-AL 2 o 3 -SiO 2 Milky white heat-resistant glass-ceramic has the characteristics of high melting temperature, high viscosity of glass liquid, and short material property. It provides a method that can reduce the melting temperature and nucleation temperature of LAS basic glass without changing the main physical and chemical properties of the glass.

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  • Preparation method for milk-white and heat-resistant microcrystalline glass with low dilatability

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[0020] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0021] Any feature disclosed in this specification (including any appended claims, abstract), unless otherwise stated, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0022] A preparation method of low-expansion milky white heat-resistant glass-ceramics, said glass-ceramics is made up of the raw materials of following weight: 5-8 parts of lithium carbonate, 22-26 parts of aluminum hydroxide; 59-63 parts of quartz sand, magnesium oxide 1.2-1.8 parts, 2.4-3 parts of zinc oxide, 1.4-1.6 parts of sodium nitrate, 0.14-0.21 parts of zircon sand, 0.3-0.5 parts of antimony oxide, 4-5 parts of titanium oxide.

[0023] A preparation metho...

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Abstract

The invention provides a preparation method for milk-white and heat-resistant microcrystalline glass with low dilatability. The microcrystalline glass is composed of the following raw materials, in parts by weight: 5-8 parts of lithium carbonate, 22-26 parts of aluminium hydroxide, 59-63 parts of quartz sand, 1.2-1.8 parts of magnesium oxide, 2.4-3 parts of zinc oxide, 1.4-1.6 parts of sodium nitrate, 0.14-0.21 part of zircon sand, 0.3-0.5 part of antimony oxide, and 4-5 parts of titanium oxide. The preparation method provided in the invention aims to solve the technical problem that Li<2>O-Al<2>O<3>-SiO<2> (LAS) milk-white and heat-resistant microcrystalline glass has the characteristics of high melting temperature, large molten glass viscosity and high glass viscosity variation speed, and under the preconditions that main physical and chemical properties of LAS glass are not changed, the melting temperature and the nucleating temperature of the LAS basic glass prepared by the method provided in the invention can be reduced .

Description

technical field [0001] The invention relates to the technical field of glass preparation, in particular to a preparation method of low-expansion milky white heat-resistant glass-ceramics. Background technique [0002] Glass-ceramics is a basic glass-ceramic with a specific composition, which becomes a composite material with uniform distribution of microcrystals and glass phases after heat treatment at a specific temperature. [0003] Li 2 O-AL 2 o 3 -SiO 2 Milky white glass-ceramics is an important variety of glass-ceramics. It is famous for its low coefficient of thermal expansion, good thermal stability, and thermal shock resistance above 850°C. This material has relatively high hardness, mechanical strength, chemical stability, and electrical insulation, and is used in the manufacture of cookware, tableware, induction cooker panels, high-temperature heat exchangers, etc. [0004] In this glass composition SiO 2 、AL 2 o 3 The mass fraction of glass accounts for m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C6/04C03C10/00C03B32/02
CPCC03C1/00C03B32/02C03C10/0027
Inventor 孙国刚徐惠豪潘志成
Owner JIANGSU JIELONG GLASSWARE TECH
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