| Ni掺杂对Ba_(0.7)Sr_(0.3)TiO_3热演变及相组成的影响 |
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| 引用本文： | 廖恒成,吴其昌,徐亮,王慧萍,张敏.Ni掺杂对Ba_(0.7)Sr_(0.3)TiO_3热演变及相组成的影响[J].南京大学学报(自然科学版),2009,45(2). |
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| 作者姓名： | 廖恒成 吴其昌 徐亮 王慧萍 张敏 |
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| 作者单位： | [1]东南大学材料科学与工程学院,南京 211189 [2]江苏省先进金属材料重点实验室,南京211189 |
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| 摘 要： | 掺杂是改善Ba0.7Sr0.3TiO3（BST）性能的重要方法之一,而认识其热演变过程和相组成有助于制备性能优异的BST.本文选取分析纯醋酸镍Ni（Ac）2、醋酸钡Ba（Ac）2、醋酸锶Sr（Ac）2、和化学纯钛酸丁酯Ti（OC4H9）4为主要原料,冰醋酸HAc为溶剂和酸度调节剂、乙二醇-甲醚C3H8O2为摩尔浓度调节剂,采用溶胶-凝胶法按组分为Ba0.7Sr0.3（Ti1-xNix）O3（x=0,0.05,0.10,0.20和0.30）的化学计量比在醋酸溶液体系中制备了未掺杂和掺Ni的钛酸锶钡的凝胶和粉末.运用DSC研究了Ni的掺入对BST热演变过程影响.采用慢扫描和快扫描XRD技术分析了Ni掺杂对相组成、晶面间距和晶粒尺寸的影响.Ni掺杂强烈影响BST体系的热演变过程特别是晶化过程,由未掺杂BST体系的双相变过程逐渐变成单相变过程,加快了反应速率.经750℃晶化退火0.5h的Ni掺杂BST体系,得到单一的纯BST相不是单相变过程而是双相变过程.XRD分析结果表明,在相同热经历状况下,Ni掺杂BST体系晶化反应充分完全,BST相结晶性良好,当Ni掺入量到0.05时得单一的BST相 随Ni掺入量进一步增多,BST体系中（Ba,Sr）CO3相的含量增多.BST晶体（110）晶面间距d随Ni的掺入增大而增大,且晶粒尺寸逐渐减小.
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| 关 键 词： | 钛酸锶钡 溶胶-凝胶 掺杂 镍 |
Effect of Ni doping on pyrolysis evolution and phase constitutes of Ba_(0.7)Sr_(0.3)TiO_3 |
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| Liao Heng-Cheng,Wu Qi-Chang,Xu Liang,Wang Hui-Ping,Zhang Min.Effect of Ni doping on pyrolysis evolution and phase constitutes of Ba_(0.7)Sr_(0.3)TiO_3[J].Journal of Nanjing University: Nat Sci Ed,2009,45(2). |
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| Authors: | Liao Heng-Cheng Wu Qi-Chang Xu Liang Wang Hui-Ping Zhang Min |
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| Institution: | 1.School of Materials Science and Engineering;Southeast University;Nanjing;211189;China;2.Jiangsu Key Laboratory for Advanced Metallic Materials;China |
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| Abstract: | Doping method is a good and effective technique to modify the dielectric properties of barium strontium titanate(BST)ferroelectric material system.The highlight in its pyrolysis evolution and phase constitutes is in favor of preparing a high quality of production.In this work,Ba0.7Sr0.3(Ti1-xNix)O3(x=0,0.05,0.10,0.20 and 0.30)precursor solutions were confected by using analytical purity of barium acetate,strontium acetate and nickel acetate and chemical purity of Ti(OC4H9)4 as the starting materials,2-metho... |
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