一种基于可控相变制备高性能氧化铝陶瓷的方法及所得氧化铝陶瓷
By introducing yttrium oxide into alumina ceramics and combining it with spark plasma sintering and heat treatment, residual compressive stress and dislocation networks are introduced into the alumina matrix through phase transformation reaction, which solves the problems of component segregation and interface weakening caused by the addition of multiple components and significantly improves the flexural strength of alumina ceramics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANDONG UNIV
- Filing Date
- 2026-05-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing alumina ceramics are prone to component segregation and interface weakening due to the addition of multiple components, making it difficult to effectively improve flexural strength. Traditional sintering aids cannot further improve flexural strength after achieving high density.
Using yttrium oxide as a sintering aid, combined with spark plasma sintering and heat treatment, residual compressive stress and dislocation network are introduced into the alumina matrix through the phase transformation reaction between yttrium oxide and alumina, and the volume expansion accompanying the phase transformation is used to improve the bending strength.
It significantly improves the flexural strength of alumina ceramics, reaching over 800 MPa, simplifies the raw material system and preparation process, and improves batch stability in industrial production.
Smart Images
Figure CN122212693B_ABST