摘要
分别采用可低温烧结日本产Al2O3和国产纳米Al2O3粉料以及ZrOCl2·8H2O、Ce(NO3)3·6H2O用共沉淀法制备了Vol(Al2O3)∶Vol(10Ce-TZP)=85∶15两种ZTA复合材料。利用XRD、TEM对合成的复合粉料的相组成和颗粒形貌进行分析,同时通过体积密度测定和SEM研究了试样的烧结性能。研究结果表明:CeO2和Al2O3能够共同稳定t-ZrO2,在相同煅烧温度的条件下,氧化铝粉越细,对ZrO2晶粒生长的抑制越明显。与国产纳米Al2O3相比,高活性日本产Al2O3能使该复合材料的烧结温度降低100℃。
The two kind of ZTA composites of vol（Al2O3） ： vol（10Ce-TZP）=85 ： 15 were prepared by adding a low-temperature-sinterable alumina made in Japan and a nano-sized domestic alumina separately to mixed gel of zirconium hydroxide and cerium hydroxide synthesized by the chemical coprecipitation method with ZrOCl2 ·8H2O and Ce（NO3）3 · 6H2O. The X-Ray Diffraction and transmission electron microscope were used to investigate the phase compositions and particle morphology of the synthesized composite powders, respectively. Meanwhile, the sintering properties of the composites were studied by the measurement of sample densities and scanning electron microscope. The results indicate that ceria and alumina powder can co-stabilize the tetragonal zirconia. At the same calcination temperature, the finer the alumina powder is, the more effectively the grain growth of t-ZrO2 is eliminated. High sinter reactivity alumina from Japan lower down the sintering temperature of ZTA composites by 100℃compared to the nano-sized domestic alumina.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2008年第4期6-8,27,共4页
China Ceramics
关键词
氧化铝
铈稳定四方相氧化锆
粒径
烧结
Al2O3, cerium-stabilized-tetragonal-zirconia, crystallite size, sintering
