Ultralow-expansion-coefficient high-transparency microcrystalline glass and preparation method thereof

A technology of glass-ceramic and expansion coefficient, which is applied in the field of ultra-low expansion coefficient and high-transparency glass-ceramic and its preparation, can solve the problems of difficult-to-heat dishes, inability to solve environmental and glass pollution, difficult glass-ceramic products, etc. The effect of solving molding difficulties, improving heat resistance, and reducing high temperature viscosity

Active Publication Date: 2015-02-25
虎石新材料(宜兴)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In Patent Document 2, Patent Document 3, Patent Document 4, and Patent Document 5, arsenic oxide and / or antimony oxide are all selected as clarifiers, which cannot solve the pollution problem to the environment and glass, and this kind of glass-ceramic products is difficult to use as a clarifier. Heating utensils such as cooking utensils, kitchen utensils, and tableware in the food and beverage industry; it is also difficult to make large-sized or complex-structured glass-ceramic products such as cooking utensils and pans

Method used

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  • Ultralow-expansion-coefficient high-transparency microcrystalline glass and preparation method thereof
  • Ultralow-expansion-coefficient high-transparency microcrystalline glass and preparation method thereof
  • Ultralow-expansion-coefficient high-transparency microcrystalline glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An ultra-low expansion coefficient high-transparency glass-ceramic, comprising a base glass, a crystal nucleating agent and a clarifying agent, and the components of the glass-ceramic by weight percentage: including 68.0% SiO 2 , 19.4% Al 2 O 3 , 3.30% Li 2 O, 3.77% of B 2 O 3 , 0.40% Na 2 O, 0.11% K 2 Base glass consisting of O, 0.30% MgO, 0.69% BaO, and 0.61% ZnO; 1.30% TiO 2 , 1.10% ZrO 2 , 0.40% of P 2 O 5 and 0.60% F of crystal nucleating agent; and 0.02% CeO 2 As a clarifying agent, where CeO 2 with SiO 2 The content ratio of CeO 2 / SiO 2 =0.0003, CeO 2 with Al 2 O 3 The content ratio of CeO 2 / Al 2 O 3 =0.0010 and CeO 2 , SiO 2 , Al 2 O 3 The sum of the weight percentages of the three CeO 2 +SiO 2 +Al 2 O 3 =87.42%. A method for preparing a glass-ceramic with ultra-low expansion coefficient and high transparency, the preparation method is carried out according to the following steps: (1) according to the formula of the above-mentioned ...

Embodiment 2

[0033] A glass-ceramic with ultra-low expansion coefficient and high transparency, including base glass, crystal nucleating agent and clarifying agent, the composition of the glass-ceramic is calculated by weight percentage: including 65.0% SiO 2 , 20.0% Al 2 o 3 , 3.60% Li 2 O, 4.50% B 2 o 3 , 0.20% Na 2 O, 0.28% K 2 Base glass composed of O, 0.50% MgO, 1.40% BaO and 0.76% ZnO; 1.66% TiO 2 , 1.20% ZrO 2 , 0.50% P 2 o 5 and 0.30% of the F composition of the nucleating agent; and 0.10% of CeO 2 As a clarifying agent, where CeO 2 with SiO 2 The content ratio of CeO 2 / SiO 2 =0.0015, CeO 2 with Al 2 o 3 The content ratio of CeO 2 / Al 2 o 3 =0.0050 and CeO 2 , SiO 2 、Al 2 o 3 The sum of the weight percentages of the three CeO 2 +SiO2 2 +Al 2 o 3 =85.10%. A method for preparing glass-ceramic with ultra-low expansion coefficient and high transparency. The preparation method is carried out according to the following steps: (1) ingredients according to the ...

Embodiment 3

[0037]A glass-ceramic with ultra-low expansion coefficient and high transparency, including base glass, crystal nucleating agent and clarifying agent, the components of the glass-ceramic are calculated by weight percentage: including 66.0% SiO 2 , 19.5% Al 2 o 3 , 4.20% Li 2 O, 3.40% B 2 o 3 , 0.10% Na 2 O, 0.40% K 2 Base glass composed of O, 0.32% MgO, 0.60% BaO and 0.73% ZnO; 1.70% TiO 2 , 1.30% ZrO 2 , 0.80% P 2 o 5 and 0.80% of the F composition of the nucleating agent; and 0.15% of CeO 2 As a clarifying agent, where CeO 2 with SiO 2 The content ratio of CeO 2 / SiO 2 =0.0023, CeO 2 with Al 2 o 3 The content ratio of CeO 2 / Al 2 o 3 =0.0077 and CeO 2 , SiO 2 、Al 2 o 3 The sum of the weight percentages of the three CeO 2 +SiO2 2 +Al 2 o 3 =85.65%. A method for preparing glass-ceramic with ultra-low expansion coefficient and high transparency. The preparation method is carried out according to the following steps: (1) ingredients according to the f...

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Abstract

The invention discloses an ultralow-expansion-coefficient high-transparency microcrystalline glass which comprises the following components in percentage by weight: 65-69% of SiO2, 19-20% of Al2O3, 3.1-4.2% of Li2O, 3-4.5% of B2O3, 0.1-0.4% of Na2O, 0.1-0.4% of K2O, 0.3-0.5% of MgO, 0.6-1.4% of BaO, 0.6-1.4% of ZnO, 1.0-1.7% of TiO2, 1.0-1.3% of ZrO2, 0.4-0.8% of P2O5, 0.3-0.8% of F and 0.02-0.3% of CeO2. The preparation method comprises the following steps: melting glass raw materials, cooling, molding, annealing, crystallizing, and carrying out after treatment to obtain the microcrystalline glass finished product. The microcrystalline glass has the advantages of high transparency and ultralow expansion coefficient, and can be used for manufacturing large-size or complex-structure products.

Description

technical field [0001] The present invention relates to a kind of Li 2 O~Al 2 o 3 ~SiO2 2 It belongs to the technical field of glass-ceramics, and specifically relates to a glass-ceramic with ultra-low expansion coefficient and high transparency and a preparation method thereof. Among the heat-resistant containers with low expansion coefficient and high transparency, it is suitable as a glass-ceramic product with large size or complex structure, which can be safely used in the food and beverage industry, such as cooking pans, frying pans, baking pans and other open flames Heated cookware, kitchenware, tableware and laboratory warming vessels. Background technique [0002] Glass-ceramic is a specific composition glass with high chemical composition and melting requirements. After heat treatment at a certain temperature, it becomes a composite material with uniform distribution of microcrystals and glass phases, also known as ceramic glass. It has excellent properties suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/14
Inventor 蒋达光
Owner 虎石新材料(宜兴)有限公司
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