Lanthanum hexaboride zirconium diboride composite ceramic and method of making same
Lanthanum hexaboride and zirconium diboride ultrafine-grained composite ceramics were prepared by NaBH4 reduction method and high-temperature and high-pressure sintering technology, which solved the problems of coarse grains and complicated preparation of lanthanum hexaboride powder, and realized ceramic materials with nanoscale grains and high hardness, which are suitable for industrial production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YANSHAN UNIV
- Filing Date
- 2024-04-19
- Publication Date
- 2026-07-21
AI Technical Summary
In existing technologies, lanthanum hexaboride powder has large grain size, a complex preparation process, and expensive raw materials, which limits its widespread application.
Lanthanum hexaboride nanoparticles were synthesized at low temperature using the NaBH4 reduction method and then mixed with zirconium diboride powder. The resulting lanthanum hexaboride and zirconium diboride ultrafine-grained composite ceramics were prepared by high-temperature and high-pressure sintering, thus controlling the grain size and properties.
A fine-grained, high-hardness lanthanum hexaboride and zirconium diboride ultrafine-grained composite ceramic was prepared. The raw materials were inexpensive, the reaction was simple, and it was easy to carry out industrial production. The grain size was reduced from micrometers to nanometers, and the hardness was increased to 19-30 GPa.
Smart Images
Figure CN118420350B_ABST