Effect of Gd2O3 and La2O3 on BaTiO3 -Based Ceramics

稀土学报(英文版), 2004, 22(z3): 170-172.

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1.School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China

2.School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China

3.School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China

4.School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China

5.School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China

基金项目: 国家自然科学基金(50172035)

Effect of Gd2O3 and La2O3 on BaTiO3 -Based Ceramics

Keywords： rare-earth oxides

The addition of rare-earth oxides Gd2O3 and La2O3 to BaTiO3-based ceramics can restrain the growth of grain size, which obtained small grain size below 1 μm and high density. The dielectric constant at room temperature increased and the curve of ε-T was flattened which illustrated that the ferroelectricity of BaTiO3-based ceramics was weakened. In addition, it is illustrated that Gd2O3 leads to chemical nonhomogeneous property, i.e. core-shell structure and La2 O3 leads to chemical homogenous property, which take different effects on capacitance- temperature characteristic.

参考文献

[1]	Hamaji Y;Sano H;Wada H;Tomono K.Effect of rare earth oxides on X7R dielectrics[A].Japan.Tsukuba,1995:273.
[2]	Daniels J;Haardtl K H .Electrical conductivity at high temperatures of donor-doped barium titanate ceramics[J].Philips Research Reports,1976,31:516.
[3]	Shaikh Aziz S et al.Defect structure and dielectric properties of Nd2O3 modified baTiO3[J].Journal of the American Ceramic Society,1986,69:689.

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Effect of Gd2O3 and La2O3 on BaTiO3 -Based Ceramics

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