Preparation method of strontium titanate heat source core block

The preparation process of strontium titanate heat source chips is simplified by using wet mixing and cold pressing, which solves the problems of complex equipment and high cost in the existing technology, and realizes efficient and low-cost production of strontium titanate heat source chips.

CN118598653BActive Publication Date: 2026-07-14CHINA INSTITUTE OF ATOMIC ENERGY
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Patent Information

Application Number
CN202410634897.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-05-21
Publication Date
2026-07-14
Estimated Expiration
2044-05-21

AI Technical Summary

Technical Problem

The existing process for preparing strontium titanate heat source chips is complex, requiring hot pressing and sintering, which demands high-end equipment and is costly, making it unsuitable for mass production in a hot chamber.

Method used

Strontium titanate core blocks were prepared by wet mixing of strontium carbonate and titanium dioxide, followed by drying, heat treatment, and cold pressing. This eliminated the hot pressing and sintering step and used a muffle furnace for calcination, simplifying the process.

Benefits of technology

The preparation process has been shortened, equipment requirements have been reduced, production efficiency has been improved, and construction and operating costs have been reduced. The conversion rate of strontium titanate has reached over 95%, and the density has reached over 70% TD.

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Abstract

The application relates to a preparation method of a strontium titanate heat source core block, which comprises the following steps: mixing strontium carbonate and titanium dioxide by adopting a wet mixing mode to obtain slurry; drying the slurry, and then performing first heat treatment to obtain a mixture; performing cold pressing forming on the mixture to obtain a green body; and performing second heat treatment on the green body to obtain the strontium titanate core block. In the preparation method, a strontium titanate conversion process is reduced to three steps of mixing, drying and heat treatment, so that the process flow is greatly shortened. Moreover, the cold pressing forming can be performed in an oil press, the related complex equipment and precise operation are omitted, and the production efficiency is improved.
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