Colored glass-ceramic with ultra-low expansion coefficient and high transparency and preparation method thereof

Abstract

A colored glass-ceramic with ultra-low expansion coefficient and high transparency. The basic components of the glass-ceramics are: 65-69% SiO2, 19-20% Al2O3, 3.1-4.2% Li2O, 3 ~4.5% B2O3, 0.1~0.4% Na2O, 0.1~0.4% K2O, 0.3~0.5% MgO, 0.6~1.4% BaO, 0.6~1.4% ZnO, 1.0~1.7% TiO2, 1.0~ 1.3% ZrO2, 0.4-0.8% P2O5, 0.3-0.8% F and 0.02-0.3% CeO2; when the weight of the basic components is 100%, add coloring not exceeding 4% of the total weight of the basic components agent. The colored glass-ceramic of the present invention has high transparency, ultra-low expansion coefficient and can produce products with large size or complex structure.

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, specifically relates to a color glass-ceramics with ultra-low expansion coefficient and high transparency and its preparation method. The color glass-ceramics and its colored glass-ceramics products can be used in extremely cold and hot environments In the heat-resistant vessels that require ultra-low expansion coefficient and high transparency, it is suitable as a glass-ceramic product with large size or complex structure that can be safely used in the food and beverage industry, such as kitchen utensils for cooking, frying pans, and baking. Open flame cooking utensils such as pans, kitchen utensils, tableware and laboratory heating 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 ...

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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

[0005] Conventional glass-ceramics are all milky white or black, and most of them are translucent. Due to the monotonous color of the product, it is difficult to meet the dual requirements of modern consumers for cooking utensils, kitchen utensils, tableware and other products in terms of use function and appearance art

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