碱式碳酸钴热分解产物的微量粉末X射线衍射分析  

Micro-Method Powder X-Ray Diffraction Analysis of Thermal Decomposition Product of Basic Cobalt Carbonate

作　　者：杨毅涌[1] 孙聚堂[1] 袁良杰[1] 张克立[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2001年第6期660-662,共3页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目 ( 2 99710 2 4)

摘　　要：研究了碱式碳酸钴在氮气中的热分解反应 ,测定了其热重分析曲线 ,并用微量粉末 X射线衍射法 (样品重量约 6 m g)对其热分解的固体残留物进行了表征 .实验结果表明 :在 339～ 394°C温度范围内生成尺寸 6～ 18nm的 Co3 O4与 Co O纳米晶混合物 ,在 70 0°C的最终产物为尖晶石型 Co3 O4.计算的晶胞参数为 :a=0 .80 84nm ,V=0 .5 2 83nm3 ,Z=8,Dcalc=6 .0 73g/ cm3 ,与常规 X射线衍射分析的结果相一致 .Thermal decomposition of Co 5(OH) 6(CO 3) 2·xH 2O in nitrogen was studied by thermo-gravimetric analysis and the thermal decomposition products (about 6 mg) were characterized by the micro-method powder X-ray diffraction. The residue in the range of 339~394 °C contains nano-sized CoO and Co 3O 4. And the ultimate product at 700 °C is Co 3O 4 with spinel structure, the unit cell parameters were calculated as a=0.808 4 nm,V=0.528 3 nm 3,Z=8,D calc =6.073 g/cm 3, which conform to that of conventional powder XRD.

关 键 词：微量XRD 碱式碳酸钴 氧化钴 热分解 热重分析 结构表征 微量粉末X射线衍射分析 

分 类 号：O614.812[理学—无机化学] O657.34[理学—化学]