微波诱发溶胶-凝胶自燃烧法一步合成单相Bi3.25La0.75Ti3O12纳米粉体

材料导报, 2010, 24(12): 94-98.

微波诱发溶胶-凝胶自燃烧法一步合成单相Bi3.25La0.75Ti3O12纳米粉体

阎玉萍 ^1, , 杨晓伟 ^2, , 张伟 ^3, , 莫雷清 ^4, , 曾燕伟 ^5,

1.南京工业大学材料科学与工程学院材料化学工程国家重点实验室,南京,210009

2.南京工业大学材料科学与工程学院材料化学工程国家重点实验室,南京,210009

3.南京工业大学材料科学与工程学院材料化学工程国家重点实验室,南京,210009

4.南京工业大学材料科学与工程学院材料化学工程国家重点实验室,南京,210009

5.南京工业大学材料科学与工程学院材料化学工程国家重点实验室,南京,210009

基金项目: 江苏省高校重点自然科学基金项目(06KJA43008)

关键词： Bi3.25La0.75Ti3O12 , 溶胶-凝胶自燃烧 , 微波诱发 , 纳米粉体

One-Step Synthesis of Single Phase Bi3.25La0.75Ti3O12 Nanopowders via Sol-gel Auto-combustion Assisted by Microwave

将溶胶-凝胶法与微波自然烧法相结合,利用微波诱发自燃烧技术一步合成了Bi3.25La0.75Ti3O12(BLT)纳米粉体.根据相关络合反应及其反应平衡常数所进行的理论计算,确定了前驱体溶液的最佳pH值和柠檬酸(CA)/金属离子(M)的物质的量比.分别利用红外光谱(FTIR)、X射线衍射(XRD)和扫描电镜(SEM)对前驱体及合成的纳米粉体进行了表征,结果表明,微波诱发溶胶-凝胶自燃烧法能一步合成具有层状钙铁矿结构的单相BLT纳米粉体.当pH=6、n(CA)/n(M)=2.5以及氧化度Q=80 %时,合成的单相BLT纳米粉体的平均晶粒尺寸约为30nm.

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