NDLI: Effects of La-doping on microstructure, dielectric and piezoelectric properties of Ba$_{0.85}$Ca$_{0.15}$Ti$_{0.90}$Zr$_{0.10}$O$

Content Provider	Springer Nature Link
Author	Lin, Qin Jiang, Meng Lin, Dunmin Zheng, Qiaoji Wu, Xiaochun Fan, Ximing
Copyright Year	2012
Abstract	Lead-free (Ba$_{0.85}$Ca$_{0.15}$)$_{1−x}$La$_{2/3x}$Ti$_{0.90}$Zr$_{0.10}$O$_{3}$ + 1 mol% MnO$_{2}$ ceramics have been prepared an ordinary sintering technique and the effects of La-doping on the microstructure, dielectric and piezoelectric properties of Ba$_{0.85}$Ca$_{0.15}$Ti$_{0.90}$Zr$_{0.10}$O$_{3}$ were studied. All the ceramics possess a pure perovskite structure, indicating that La ions are incorporated into Ba$_{0.85}$Ca$_{0.15}$Ti$_{0.90}$Zr$_{0.10}$O$_{3}$ lattices to form a lead-free solid solution. The ceramics are transformed from coexistence of orthorhombic and tetragonal phases to pseudocubic phase with the doping level of La increasing. After the doping of La, grain growth is inhibited, ferroelectric-paraelectric phase transition temperature (T $_{C}$) is decreased and the degree of diffuse phase transition is increased. The ferroelectricity of the ceramics is weakened after the addition of La. Unlike donor-doped lead zirconate titanate ceramics, the piezoelectric properties of the ceramics are degraded after the partial substitution of La$^{3+}$ for (Ba$_{0.85}$Ca$_{0.15}$)$^{2+}$ because of the weakness or disappearance of coexistence of orthorhombic and tetragonal phases near room temperature. The (Ba$_{0.85}$Ca$_{0.15}$)$_{1−x}$La$_{2/3x}$Ti$_{0.90}$Zr$_{0.10}$O$_{3}$ + 1 mol% MnO$_{2}$ ceramic with x = 0 exhibit the optimum piezoelectric properties: d $_{33}$ = 277 pC/N and k $_{p}$ = 30.3 %, respectively.
Starting Page	734
Ending Page	739
Page Count	6
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	24
Issue Number	2
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2012-06-26
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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