Method for preparing oxide glass based on induction melting process and oxide glass

By using composite crucibles and electromagnetic induction heating technology, the problems of large-scale production, pollution, and atmosphere control in oxide glass preparation have been solved, enabling the efficient and low-cost preparation of large-size, high-purity oxide glass.

CN121850319APending Publication Date: 2026-04-14UNIV OF SCI & TECH BEIJING
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Patent Information

Application Number
CN202610010932.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-06
Publication Date
2026-04-14

AI Technical Summary

Technical Problem

Existing technologies make it difficult to achieve large-scale production in oxide glass preparation. Traditional tank furnace melting methods suffer from high energy consumption, long cycles, and crucible material contamination. Electromagnetic induction melting, on the other hand, faces challenges such as unsuitable atmospheric conditions and changes in glass composition.

Method used

A composite crucible structure is adopted, including a first oxide layer, a conductive material layer, and a second oxide layer, with a protective felt sandwiched between them. Combined with electromagnetic induction heating, rapid melting and precise temperature control of oxide glass are achieved through staged power control and atmosphere adjustment.

Benefits of technology

This technology enables the efficient preparation of large-size oxide glasses, reduces carburization and ion migration contamination, lowers production costs, and ensures the high purity and excellent performance of the glass.

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Abstract

The invention discloses a method for preparing oxide glass based on an induction melting process and the oxide glass, the preparation method comprises the following steps: using a composite crucible to bear initial glass powder, the composite crucible comprises a first oxide layer, a conductive material layer and a second oxide layer which are arranged from outside to inside, a gap is formed between the second oxide layer and the conductive material layer, the composite crucible further comprises a protective felt, the gap is filled with the protective felt, the protective felt wraps the outer side of the second oxide layer, the protective felt is of a fiber structure, and the melting point of the protective felt is not lower than that of the initial glass powder; the initial glass powder is heated to a molten state through electromagnetic induction, a melt is obtained, the heating power in the first stage is in positive correlation with the heating time, and the heating power in the second stage is in a decreasing trend; and carrying out casting molding on the melt, and cooling to obtain the oxide glass.
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