摘要
以Mg Cl2·6H2O,Al Cl3·6H2O和Zr OCl2·8H2O为原料,NH3·H2O为沉淀剂,采用溶胶-凝胶法制备了三种Mg O/Al2O3/Zr O2质量比分别为10.0/41.4/48.6、15.0/39.1/45.9、20.0/36.8/43的Mg O-Al2O3-Zr O2复合粉。借助X-ray荧光分析仪、同步热分析仪、X-ray衍射仪、激光粒度分析仪、扫描电子显微镜对Mg O-Al2O3-Zr O2复合粉进行了表征。研究结果表明:Mg O-Al2O3-Zr O2复合粉前驱体的分解在600℃之前完成,之后随着温度升高,复合粉体析晶程度逐渐提高,在800℃的热处理温度下四方相少量析出,Mg O和Al2O3仍处于非晶相,此状态下的复合粉应具有较高的反应活性;制得的Mg O-Al2O3-Zr O2复合粉体化学成分均匀性好,粒径较细,且与氧化锆原料尺寸相匹配,可作为氧化锆质定径水口改性的添加剂。
Mg O-Al2O3-Zr O2 composite powders（ mass ratio of Mg O / Al2O3/ Zr O2 were 10. 0 /41. 4 /48. 6,15. 0 /39. 1 / 45. 9 and 20. 0 /36. 8 /43. 2 respectively） were prepared by sol-gel method using Mg Cl2·6H2O,Al Cl3·6H2O and Zr OCl2·8H2O as starting materials and NH3· H2 O as precipitant. The composite powders were investigated by X-ray fluorescence instrument,simultaneous thermal analyzer,Xray diffractometer,laser particle size analyzer and scanning electron microscope. Research show that the decomposition process of composite powders＇ precursor has completed before 600 ℃ and the crystallization degree of composite powders increases with the rising of heat treatment temperature. At 800 ℃,a small amount of t-Zr O2 precipitates,meanwhile Mg O and Al2O3 are still in the amorphous phase. The Mg OAl2O3-Zr O2 composite powders should have high reactivity under this condition; the chemical composition uniformity of composite powders are good,and the particle size is fine and matched with the size of zirconia raw material,as the additive of modified metering nozzle.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2015年第3期705-710,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(51372193)
陕西省自然科学基础研究计划项目(2014JM6224)
