Low-expansion borosilicate transparent glaze and a preparation method and use thereof

US12421160B2 · kind B2 · utility

Assignees

• ZHEJIANG UNIVERSITY · CN
• HANGZHOU GRAND CANAL COMPREHENSIVE PROTECTION DEVELOPMENT AND CONSTRUCTION GROUP CO., LTD. · CN

Inventors

• GAORONG HAN · Hangzhou City, CN
• Yijian Wang · Hangzhou City, CN
• Xuebo Li · Hangzhou City, CN
• Yong Liu · Shanghai, CN
• Junbo Liu · Hangzhou City, CN
• Bentao Zhang · Hangzhou City, CN
• Li Li · Stanford, US
• Shaobo Gu · Beijing, CN
• Lin Li · 安丰镇, CN
• Dongshen Zhou · Hangzhou City, CN

Key dates

• Filing date: Dec 26, 2022
• Grant date: Sep 23, 2025
• Expiry date: Dec 26, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03B25/02
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Disclosed is a low-expansion borosilicate transparent glaze, a preparation method thereof, and use thereof in preparation of a glaze product by secondary fusion-cast molding. The low-expansion borosilicate transparent glaze has raw material composition by mass percentage including: 72%-80% of SiO2, 4%-12% of B2O3, 4%-12% of Na2O, 0.1%-4% of CaO, 0.1%-6% of Al2O3, 0-0.05% of Fe2O3, 0-2% of MgO, 0-2% of K2O, 0-2% of ZnO, 0-2% of BaO, 0-2% of ZrO2, 0-0.5% of Li2O, and 0-0.5% of TiO2, wherein a sum of mass percentages of SiO2, B2O3 and Al2O3 is 85%-95%. The preparation method includes steps of: (1) after mixing dried raw materials, melting at 1400-1540° C. to obtain a high-temperature glass melt; (2) cooling the high-temperature glass melt to 1150-1230° C. to mold; and (3) annealing a molded glass at 530-600° C. to obtain the low-expansion borosilicate transparent glaze.