Preparation of polycrystalline BaTi2O5 ferroelectric ceramics

Guo jun Li; Rong Tu; Takashi Goto

doi:10.1016/j.matlet.2009.07.040

Preparation of polycrystalline BaTi₂O₅ ferroelectric ceramics

Guo jun Li, Rong Tu, Takashi Goto

Materials Processing and Characterization Division

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Polycrystalline BaTi₂O₅ (BT₂) was prepared by solid state sintering in air using BaCO₃ and TiO₂ as starting materials. A rod-like BT₂ sintered bodies in a single phase were obtained above 1025 °C by adding 5 wt.% B₂O₃. The densification of BT₂ sintered bodies decreased with increasing sintering temperature. The maximum permittivity of BT₂ sintered body was 640 at the Curie temperature (T_c) of 461 °C and the frequency of 100 kHz. The addition of B₂O₃ was effective to obtain BT₂ in a single phase at low temperatures with elongated microstructure and to improve the permittivity, indicating the formation of preferred orientation at low temperature was related with liquid-phase sintering mechanism.

Original language	English
Pages (from-to)	2280-2282
Number of pages	3
Journal	Materials Letters
Volume	63
Issue number	27
DOIs	https://doi.org/10.1016/j.matlet.2009.07.040
Publication status	Published - 2009 Nov 15

Keywords

Ceramics
Ferroelectrics
Microstructure
Sintering
X-ray diffraction

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Preparation of polycrystalline BaTi2O5 ferroelectric ceramics",

abstract = "Polycrystalline BaTi2O5 (BT2) was prepared by solid state sintering in air using BaCO3 and TiO2 as starting materials. A rod-like BT2 sintered bodies in a single phase were obtained above 1025 °C by adding 5 wt.% B2O3. The densification of BT2 sintered bodies decreased with increasing sintering temperature. The maximum permittivity of BT2 sintered body was 640 at the Curie temperature (Tc) of 461 °C and the frequency of 100 kHz. The addition of B2O3 was effective to obtain BT2 in a single phase at low temperatures with elongated microstructure and to improve the permittivity, indicating the formation of preferred orientation at low temperature was related with liquid-phase sintering mechanism.",

keywords = "Ceramics, Ferroelectrics, Microstructure, Sintering, X-ray diffraction",

author = "Li, {Guo jun} and Rong Tu and Takashi Goto",

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T1 - Preparation of polycrystalline BaTi2O5 ferroelectric ceramics

AU - Li, Guo jun

AU - Tu, Rong

AU - Goto, Takashi

PY - 2009/11/15

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N2 - Polycrystalline BaTi2O5 (BT2) was prepared by solid state sintering in air using BaCO3 and TiO2 as starting materials. A rod-like BT2 sintered bodies in a single phase were obtained above 1025 °C by adding 5 wt.% B2O3. The densification of BT2 sintered bodies decreased with increasing sintering temperature. The maximum permittivity of BT2 sintered body was 640 at the Curie temperature (Tc) of 461 °C and the frequency of 100 kHz. The addition of B2O3 was effective to obtain BT2 in a single phase at low temperatures with elongated microstructure and to improve the permittivity, indicating the formation of preferred orientation at low temperature was related with liquid-phase sintering mechanism.

AB - Polycrystalline BaTi2O5 (BT2) was prepared by solid state sintering in air using BaCO3 and TiO2 as starting materials. A rod-like BT2 sintered bodies in a single phase were obtained above 1025 °C by adding 5 wt.% B2O3. The densification of BT2 sintered bodies decreased with increasing sintering temperature. The maximum permittivity of BT2 sintered body was 640 at the Curie temperature (Tc) of 461 °C and the frequency of 100 kHz. The addition of B2O3 was effective to obtain BT2 in a single phase at low temperatures with elongated microstructure and to improve the permittivity, indicating the formation of preferred orientation at low temperature was related with liquid-phase sintering mechanism.

KW - Ceramics

KW - Ferroelectrics

KW - Microstructure

KW - Sintering

KW - X-ray diffraction

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