共沉淀法制备ZrO_2-Al_2TiO_5复合材料烧结性能研究  

Preparation of ZrO_2-Al_2TiO_5 Composite Materials by Coprecipitation Method and their Sintering Properties

作　　者：卜景龙[1] 王志发[1] 朱宝利[2] 张利芳[1] 陈硕[1] 李浩满 

机构地区：[1]河北理工大学,河北唐山063009 [2]北京科技大学,北京100083 [3]唐山燃气总公司,河北唐山063000

出　　处：《稀有金属材料与工程》2007年第A01期826-829,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金委员会资助项目(50572023);河北省教育厅自然科学资助项目(2006116)

摘　　要：以平均粒径为5μm的二氧化锆微细粉为被覆体,分散在Al3+浓度0.02mol·L-1可溶铝盐及Ti3+浓度0.01mol·L-1的钛盐溶液中,以浓度为0.2mol·L-1的氨水为沉淀剂,pH控制为5.3,获得Al2O3和TiO2纳米颗粒被覆ZrO2的悬浮体。将悬浮体脱水、干燥,经1350℃,1400℃,1450℃,1500℃烧结获得ZrO2-Al2TiO5复相陶瓷材料。结果表明:组成为95%ZrO2并经1500℃烧结的试样,其气孔率1.08%、体积密度4.57g/cm3、抗折强度71.2MPa。Zirconium oxide miropowders which were used as covered matters were dispersed in mixture solution of 0.02 mol.L^-1 Al^3＋ and 0.01 mol.L^-1 Ti^3＋. 0.2 mol.L^-1 aqueous ammonia was used as precipitating agent. The pH value of mixture solution was controlled at 5.3. Zirconium oxide suspension could be obtained, which was covered by alumina and titania nanopowder. After suspension was dehydrated, dried and calcined at 1350℃, 1400℃, 1450℃ and 1500℃, ZrO2-Al2TiO5 polyphase ceramic materials were obtained. Results indicated that samples with 95 wt% zirconia sintered at 1500℃ are of 1.05% porosity, 4.57 g/cm^3 bulk density and 71.2 MPa bending strength.

关 键 词：ZrO2:Al2TiO5 复相陶瓷 共沉淀法 

分 类 号：TQ174.1[化学工程—陶瓷工业]