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| 钴铝镁铝水滑石的热稳定性能及其氧化物的结构研究 | |
| 引用本文： | 王滔,王安琪,余丰,吴秀玲,孟大维,刘晓旸. 钴铝镁铝水滑石的热稳定性能及其氧化物的结构研究[J]. 功能材料, 2012, 43(9): 1200-1203 |
| 作者姓名： | 王滔 王安琪 余丰 吴秀玲 孟大维 刘晓旸 |
| 作者单位： | 1. 中国地质大学材料与化学学院,湖北武汉,430074 2. 中国地质大学材料与化学学院,湖北武汉430074／吉林大学化学学院,无机合成与制备化学国家重点实验室,吉林长春130012 3. 吉林大学化学学院,无机合成与制备化学国家重点实验室,吉林长春130012 |
| 基金项目： | 国家自然科学基金资助项目，中国地质大学“李四光创新人才计划”资助项目，全国大学生创新训练资助项目，英才工程计划资助项目 |
| 摘 要： | 采用溶液共沉淀法合成了CoAl-HT和MgAl-HT水滑石,在800℃下煅烧4h得到了钴铝和镁铝尖晶石氧化物粉体。利用XRD、FT-IR和TG对水滑石及其氧化物粉体的结构和热稳定性能进行了表征分析。从XRD和FT-IR分析结果可知,所得产品为层板水滑石物质,且结晶性良好,从CoAl-HT和MgAl-HT结果对比可知,镁铝组合更容易形成水滑石结构;由氧化物粉体的XRD分析结果可知,在800℃下两者都形成了尖晶石结构,且钴铝氧化粉体尖晶石无杂相,结晶性更好;TG曲线呈现了两个样品的水滑石热学性能,通过对比可知,MgAl-HT在216和372℃下分解而CoAl-HT在197和243℃下分解说明MgAl-HT比CoAl-HT具有更好的热稳定性能。 |
| 关 键 词： | 钴铝水滑石 镁铝水滑石 结构 热稳定性 |
The research of the structure and heat stability of CoAl-HT/MgAl-HT and oxide powder |
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| WANG Tao,WANG An-qi,YU Feng,WU Xiu-ling,MENG Da-wei,LIU Xiao-. The research of the structure and heat stability of CoAl-HT/MgAl-HT and oxide powder[J]. Journal of Functional Materials, 2012, 43(9): 1200-1203 | |
| Authors: | WANG Tao WANG An-qi YU Feng WU Xiu-ling MENG Da-wei LIU Xiao- |
| Affiliation: | yang2(1.Faculty of Material Science and Chemistry,China University of Geosciences,Wuhan 430074,China; 2.State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry,Jilin University,Changchun 130012,China) |
| Abstract: | CoAl-HT and MgAl-HT samples were prepared by the method of coprecipitation.Then they were calcined in 800℃ for 4h to give spinel oxide powder.After that the structure and heat stability were characterized by the methods of powder X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),simultaneous thermogravimetry analysis(TG).The results of XRD and FT-IR showed that the typical diffraction peaks,which proved the formation of layered structure of HT and the crystal form of MgAl-HT was better than of CoAl-HT,were observed and compared in two samples.The XRD results of oxide powder showed that the spinel structure was formed in two samples.And the structure of CoAl2O4 was more perfect than of MgAl2O4.Besides TG showed that MgAl-HT is higher heat stability than CoAl-HT. |
| Keywords: | CoAl hydrotalcite-like compounds MgAl hydrotalcite-like compounds structure heat stability |
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