摘要
以纳米Al2O3和TiN为原料,以SiO2为助烧剂,热压烧结后获得TiN-Al2O3复相陶瓷。TiN-Al2O3复相陶瓷具有较优异的力学性能:三点弯曲强度最高达到565.8MPa,断裂韧性在4～6MPa·m1/2之间。复相陶瓷中立方TiN均匀地分布在Al2O3基体中,TiN颗粒主要分布在Al2O3晶界处。当TiN颗粒的体积含量为5%时,TiN-Al2O3复相陶瓷的电阻率在1012～104Ω·cm范围内,其加载电压可达0.75kV/mm。
Nano TiN-Al2O3 composite ceramics were prepared by hot-pressing using nano Al2O3 and TiN as raw materials and SiO2 as sintering additive. The flexural strength of the as-prepared ceramics is up to 565.8 MPa and the fracture toughness is between 4 and 6 MPa·m1/2. The cubic TiN grains are homogenously distributed in Al2O3 matrix in the composite ceramics. Most of TiN particles lay in the grain boundaries of Al2O3. When the volume fraction of TiN was 5%,the electrical resistivity of TiN-Al2O3 composite ceramics is between 1012 to 104 Ω·cm. The highest on-load voltage of the ceramics could reach 0.75 kV/mm.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2010年第8期1480-1483,1492,共5页
Journal of The Chinese Ceramic Society
关键词
导电陶瓷
氧化铝-氮化钛复合陶瓷
导电性能
力学性能
conductive ceramics
alumina-titanium nitride composite ceramics
electrical properties
mechanical properties
