摘要
应用Sol-gel法成功地合成了超细CoTiO3粉体。先驱体溶胶的DSC分析表明仅在565．8℃处有一放热峰。应用XRD和SEM研究了预热处理对粉体的形成和形貌。XRD分析表明先驱体经预热处理和接着在700℃烧成3h后得到了纯的con03粉体，未经预热处理粉体的粒子尺寸为42．5nm，300和400℃预热处理粉体的粒子尺寸分别为41．9和45．2nm。晶格常数计算揭示出未经预热处理粉体的c/α比为2．7440，300和400℃预热处理粉体的c/α分别为2．7455和2．7474。SEM分析揭示出未经热处理币’300℃预热处理粉体为约80～150nm球形粒子，400℃预热处理粉体为约100～200nm菱形六面体粒子。
Ultrafine ilmenite CoTiO3 powders were prepared with sol-gel method. DSC pattern of the dried precursor showed only peak at 565.8℃. The effects of preheat treat on the formation and morphology of powders were studied using XRD and SEM. The XRD analysis revealed that single phase of ilmenite CoTiO3 powders and films were obtained by preheating precursors at lower temperature followed by calcining at 700℃ for 3h. The average particle sizes of powders were 42.5nm, 41.gnm and 45.2nm for non-preheated, preheated at 300℃ and 400℃ powders respectively. Calculation of lattice parameter indicated that c/α ratio was increase from 2.7440 to 2.7455 and 2.7474 with increasing the preheat temperature. SEM analysis indicated that powders non-preheated and preheated at 300℃ were spherical particles with particle size about 80-150nm and powder preheated at 400℃ was rhombohedral particle with particle size about 100-20Ohm.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第A03期1288-1290,共3页
Journal of Functional Materials
