A method for preparing high-purity aluminum nitride
By using pseudo-thin aluminite and/or gamma alumina in flowing nitrogen for reduction nitriding reaction with carbon source and charcoal treatment, the problems of incomplete nitriding and difficult to remove oxygen impurities in the existing aluminum nitride preparation are solved, and high-purity and low-cost aluminum nitride preparation are achieved.
CN116281891BActive Publication Date: 2025-03-28JIANGXI BAOHTEC NANO SCI CO LTD
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Patent Information
- Application Number
- CN202111499382.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-12-09
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2041-12-09
AI Technical Summary
Technical Problem
The existing aluminum nitride preparation methods have problems such as incomplete nitriding and difficult to remove oxygen impurities, which leads to low purity of aluminum nitride and high production costs.
Method used
The phthalinite and/or gamma alumina are used as the aluminum source, and mixed with the carbon source for reduction nitriding reaction, and carried out in flowing nitrogen, and high-purity aluminum nitride is obtained by charcoal treatment.
Benefits of technology
The low-cost preparation of high-purity aluminum nitride was achieved, with the oxygen content of aluminum nitride ≤0.62%, the carbon content was ≤900ppm, the purity was ≥99.2%, and the process flow was simplified.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention relates to the technical field of aluminum nitride preparation, and in particular to a method for preparing high-purity aluminum nitride. The preparation method provided by the present invention comprises the following steps: in flowing nitrogen, subjecting a mixture including an aluminum source and a carbon source to a reduction nitridation reaction to obtain an aluminum nitride semi-finished product; the aluminum source is pseudo-boehmite and / or gamma alumina, and the purity of the aluminum source is ≥99.5%; in a flowing nitrogen atmosphere, subjecting the mixture to a reduction nitrogen reaction to obtain an aluminum nitride semi-finished product; and charring the aluminum nitride semi-finished product to obtain the high-purity aluminum nitride. The preparation method provided by the present invention realizes the low-cost preparation of high-purity aluminum nitride.
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