Preparation method of high-temperature and high-pressure reaction kettle silver inner liner for large-size gallium nitride crystal growth
By using silver to prepare the reactor liner, combined with hot isostatic pressing and silver-copper brazing processes, the problems of high cost and difficult processing of platinum and platinum-iridium alloys were solved, enabling the efficient and stable preparation of large-size gallium nitride crystals that meet the requirements of extreme working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING MATERIALS RES INST
- Filing Date
- 2026-05-26
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the preparation of reactor linings using platinum and platinum-iridium alloys is costly, difficult to process, and has a low yield. It cannot simultaneously meet the stringent requirements of extreme working condition tolerance, interface cleanliness, and sealing compatibility, making it difficult to achieve large-scale preparation of large-size gallium nitride single crystals.
The reactor liner is made of silver. Through processes such as chemical purification, hydrogen reduction, hot isostatic pressing, cold rolling, spinning, welding and electroplating, the density and mechanical properties of the silver liner are improved. The sealing seat is connected by silver-copper brazing to ensure sealing and interface cleanliness.
This reduces the equipment cost of the reactor liner, improves the high temperature and high pressure resistance and corrosion resistance of the silver liner, ensures the stability and sealing reliability of gallium nitride crystal growth, and realizes the efficient and stable preparation of large-size gallium nitride crystals.
Smart Images
Figure CN122406385A_ABST