摘要
以Zr(OH)4和Y(OH)3的共沉淀为前驱体,在碱性介质中用微波水热法合成摩尔分数为8%的氧化钇稳定氧化锆(yttria stabilized cubic zirconia,YSZ)纳米粉体.通过X射线粉末衍射仪、透射电镜和等离子发射光谱等表征粉体的性能.研究了微波水热法的反应温度、时间和前驱物浓度对反应产物形貌、粒度等的影响.获得了制备具有纳米立方相结构的YSZ粉体的最佳工艺参数:粉体粒度为5～10 nm,产物纯度为99%.结果表明:温度为200℃时,产物粒径较小且均匀.微波水热制备YSZ的最佳反应时间为20～40 min.前驱物中Zr4+的最佳浓度为0.2 mol/l.增大碱性介质KOH的浓度对产物的晶型和粒度影响不大.
Cubic phase ZrO2-8% （in mole）Y2O3, nano-powders were prepared in basic media by the microwave-hydrothermal method, with Zr（OH）4 and Y（OH）3 co-precipitated from ZrO（NO3）2·2H2O and Y（NO3）3·6H2O solutions as the precursors. The resultant precipitates were characterized by X-ray diffraction, transmission electron microscopy and inductively coupled plasma-optima emission spectrometry. Influents of solution content, temperature and time on the crystalline type and morphology of yttrium stabilized cubic zirconia were studied. Well dispersed and narrowly distributed ZrO2 -8%Y2O3, nanopowders with particle sizes of 5-10 nm were obtained under the given process conditions. The best conditions for the microwave-hydrothermal method are as follows： reaction time of 20-40 min, precursor content of 0.2 mol/l, temperature of 194-200℃ , and KOH content of 0.4 mol/l . The product purity is 99~ in mass.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2005年第10期1255-1258,共4页
Journal of The Chinese Ceramic Society
基金
中国科学院新疆理化技术研究所创新项目
"西部之光"资助项目
关键词
氧化钇稳定氧化锆
纳米
微波水热法
yttria stabilized cubic zirconia
nano
microwave-hydrothermal method
