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Citation: Ruan Sheng-Ping, Dong Wei, Wu Feng-Qing, Wang Yong-Wei, Yu Tao, Peng Zeng-Hui, Xuan Li. Dielectric Properties of Nanocrystalline BaTiO₃[J]. Acta Physico-Chimica Sinica, ;2003, 19(01): 17-20. doi: 10.3866/PKU.WHXB20030105 shu

Dielectric Properties of Nanocrystalline BaTiO₃

1.
College of Electronic Science ＆ Engineering, Jilin University, Changchun　130023;Changchun Institute of Optics, Fine Mechanics Physics, Chinese Academy of Sciences, Changchun　130021;College of Chemistry, Jilin University, Changchun　130023

Received Date: 7 May 2002
Available Online: 15 January 2003

Nanocrystalline BaTiO3 is prepared using a stearic acid gel method. The synthesis process, crystalline structure and grain sizes of nanocrystal are investigated by differential thermal analysis, thermogravimetric analysis, infrared spectra and X-ray powder diffraction. The experimental results of dielectric properties of nanocrystal indicate that the dielectric constant ε of nanocrystal is much larger than that of bulk materials. With reducing of grain size, the ε of nanocrystalline material increases first, then it falls to smaller value. With the increment of relative humidity, the ε grows up. The relationship between ε and humidity becomes linear with high enough humidity.
- Dielectric properties;BaTiO₃;Nanocrystal;Sol-gel
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沈阳化工大学材料科学与工程学院沈阳 110142

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通讯作者: 陈斌, bchen63@163.com

Dielectric Properties of Nanocrystalline BaTiO₃