Dielectric behavior of samarium-doped BaZr{sub 0.2}Ti{sub 0.8}O{sub 3} ceramics

Journal Article · Wed Jan 01 00:00:00 EST 2014 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.10.001· OSTI ID:22341867

Li, Yuanliang ^[1]; Wang, Ranran ^[2]; Ma, Xuegang ^[1]; Li, Zhongqiu ^[3]; Sang, Rongli ^[1]; Qu, Yuanfang ^[4]

---

1. Analysis and Testing Center, Hebei United University, Tangshan 063009 (China)
2. English Department, Tianjin Maritime Vocational Institute, Tianjin 300457 (China)
3. Chemical College, Shijiazhuang University, Shijiazhuang 050035 (China)
4. Key Laboratory for Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin University, Tianjin 300072 (China)

Graphical abstract: - Highlights: • We investigate dielectric properties and phase transition of Sm{sup 3+}-doped BaZr{sub 0.2}Ti{sub 0.8}O{sub 3} ceramics. • The additive amount of Sm{sub 2}O{sub 3} can greatly affect the dielectric properties. • The materials undergo a diffuse type ferroelectric phase transition. • There is an alternation of substitution preference of Sm{sup 3+} ion for the host cations in perovskite lattice. - Abstract: The dielectric properties and phase transition of Sm{sup 3+}-doped BaZr{sub 0.2}Ti{sub 0.8}O{sub 3} (BZT20) ceramics were investigated. Room temperature X-ray diffraction study suggested that the compositions had single-phase cubic symmetry. Microstructure studies showed that the grain size decreased and that the Sm{sub 2}O{sub 3} amount markedly affected the dielectric properties of BZT20. A dielectric constant of 5700 at 0.2 mol% Sm{sub 2}O{sub 3} and a dissipation factor of only 0.0011 at 2 mol% Sm{sub 2}O{sub 3} were observed, indicating that BZT20 had significant potential applications. Moreover, the dielectric constant, dissipation factor, phase-transition temperature, and maximum dielectric constant increased with increased Sm{sub 2}O{sub 3} amount at ≤0.2 mol% Sm{sub 2}O{sub 3} but decreased with increased Sm{sub 2}O{sub 3} amount at >0.2 mol% Sm{sub 2}O{sub 3}.

• OSTI ID: 22341867
• Journal Information: Materials Research Bulletin, Vol. 49; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CATIONS
CERAMICS
DIFFUSION
DOPED MATERIALS
FERROELECTRIC MATERIALS
GRAIN SIZE
PERMITTIVITY
PEROVSKITE
PHASE TRANSFORMATIONS
SAMARIUM
SAMARIUM IONS
SAMARIUM OXIDES
TRANSITION TEMPERATURE
X-RAY DIFFRACTION