| La_2Ti_2O_7的合成与结构分析 |
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| 引用本文： | 丁士文,马广成,赵福欣.La_2Ti_2O_7的合成与结构分析[J].河北大学学报(自然科学版),1990(3). |
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| 作者姓名： | 丁士文 马广成 赵福欣 |
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| 作者单位： | 河北大学化学系，河北大学化学系，河北大学化学系 88届毕业生 |
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| 摘 要： | 本文用四氯化钛、三氧化二镧为原料,以氨水为碱性物质,用共沉淀法,在pH为8.5—10范围内,得到了镧和钛的氢氧化物共沉淀,经过滤、洗涤、干噪、并在1100℃灼烧1小时,得到La_2Ti_2O_7晶体。产品属单斜晶系,P_(21m)空间群。晶体具有类钙钛矿结构,其中钛以四面体同氧原子配位。扫描电镜观察,产品呈椭球形、粒度均匀,大小为0.2—0.5μm。差热结合X—射线分析表明、产品首先以非晶态出现,在850℃左右结晶。本文还就pH、灼烧温度、灼烧时间等对产品的影响作了详尽的研究。
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| 关 键 词： | 钛酸镧 合成 结构 |
The Synthesis Structure and Properties of Lanthanum Titanate(la_2Ti_2O_7) |
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| Ding Shiwen Ma Guangcheng Zhao Fuxin.The Synthesis Structure and Properties of Lanthanum Titanate(la_2Ti_2O_7)[J].Journal of Hebei University (Natural Science Edition),1990(3). |
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| Authors: | Ding Shiwen Ma Guangcheng Zhao Fuxin |
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| Institution: | Department of Chemistry |
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| Abstract: | This paper describes synthesis of La2Ti2O7by copptn.method.La2O3and TiCI4were usek as starting materials,with NH3 · H2O as precipitating agent.Nonerystal La2Ti2O7nH2O was prepared in aq.,then,crystal La2Ti2O7can be obtained by calcining at 1100℃ for Ihr
By IR spectro anal,the coordination of Ti by O atoms is tetrahedral.DTA and X-ray anal,identified that La2Ti2O7crystallizes at 845℃ .Electron mieroscope anal.,the particle size of the La2Ti2O7was 0.2-0.5um. |
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| Keywords: | Latyanum titanate synthesis |
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