Effects of extra Ba2+ and two-step sintering on the crystal structure, microstructure, and dielectric properties of (Ba, Ca)(Ti, Zr)O 3

Che Yuan Chang; Hsin I. Ho; Tsung Yu Hsieh; Chi Yuen Huang; Yu Chun Wu

doi:10.1016/j.ceramint.2013.04.009

Effects of extra Ba²⁺ and two-step sintering on the crystal structure, microstructure, and dielectric properties of (Ba, Ca)(Ti, Zr)O ₃

Che Yuan Chang
, Hsin I. Ho
, Tsung Yu Hsieh
, Chi Yuen Huang
, Yu Chun Wu

Department of Resources Engineering

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

13 Citations (Scopus)

Abstract

This study investigated how extra Ba²⁺ and two-step sintering affect the crystal structure, microstructure, and dielectric properties of (Ba, Ca)(Ti, Zr)O₃ (BCTZ). XRD results indicate that no secondary phase formed in any of the BCTZ samples after sintering. Raman spectra reveal that Ca²⁺ ions were pushed from the Ba-site to the Ti-site when extra Ba²⁺ was added after sintering. The Curie temperatures of all BCTZ samples decreased due to the smaller tetragonality caused by the addition of extra Ba²⁺. SEM micrographs revealed that two-step sintering decreased the grain size from 5.0 μm to 0.5 μm compared with normal sintering. Furthermore, samples with fine-grain microstructures exhibited flat curves for the temperature coefficient of capacitance.

Original language	English
Pages (from-to)	8245-8251
Number of pages	7
Journal	Ceramics International
Volume	39
Issue number	7
DOIs	https://doi.org/10.1016/j.ceramint.2013.04.009
Publication status	Published - 2013 Sept

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2013.04.009

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title = "Effects of extra Ba2+ and two-step sintering on the crystal structure, microstructure, and dielectric properties of (Ba, Ca)(Ti, Zr)O 3",

abstract = "This study investigated how extra Ba2+ and two-step sintering affect the crystal structure, microstructure, and dielectric properties of (Ba, Ca)(Ti, Zr)O3 (BCTZ). XRD results indicate that no secondary phase formed in any of the BCTZ samples after sintering. Raman spectra reveal that Ca2+ ions were pushed from the Ba-site to the Ti-site when extra Ba2+ was added after sintering. The Curie temperatures of all BCTZ samples decreased due to the smaller tetragonality caused by the addition of extra Ba2+. SEM micrographs revealed that two-step sintering decreased the grain size from 5.0 μm to 0.5 μm compared with normal sintering. Furthermore, samples with fine-grain microstructures exhibited flat curves for the temperature coefficient of capacitance.",

author = "Chang, \{Che Yuan\} and Ho, \{Hsin I.\} and Hsieh, \{Tsung Yu\} and Huang, \{Chi Yuen\} and Wu, \{Yu Chun\}",

note = "Funding Information: The authors would like to thank the National Science Council of the Republic of China, Taiwan , for financially supporting this research under Contract No. NSC NSC100-2221-E-006-134-MY3 . ",

year = "2013",

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doi = "10.1016/j.ceramint.2013.04.009",

language = "English",

volume = "39",

pages = "8245--8251",

journal = "Ceramics International",

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T1 - Effects of extra Ba2+ and two-step sintering on the crystal structure, microstructure, and dielectric properties of (Ba, Ca)(Ti, Zr)O 3

AU - Chang, Che Yuan

AU - Ho, Hsin I.

AU - Hsieh, Tsung Yu

AU - Huang, Chi Yuen

AU - Wu, Yu Chun

N1 - Funding Information: The authors would like to thank the National Science Council of the Republic of China, Taiwan , for financially supporting this research under Contract No. NSC NSC100-2221-E-006-134-MY3 .

PY - 2013/9

Y1 - 2013/9

N2 - This study investigated how extra Ba2+ and two-step sintering affect the crystal structure, microstructure, and dielectric properties of (Ba, Ca)(Ti, Zr)O3 (BCTZ). XRD results indicate that no secondary phase formed in any of the BCTZ samples after sintering. Raman spectra reveal that Ca2+ ions were pushed from the Ba-site to the Ti-site when extra Ba2+ was added after sintering. The Curie temperatures of all BCTZ samples decreased due to the smaller tetragonality caused by the addition of extra Ba2+. SEM micrographs revealed that two-step sintering decreased the grain size from 5.0 μm to 0.5 μm compared with normal sintering. Furthermore, samples with fine-grain microstructures exhibited flat curves for the temperature coefficient of capacitance.

AB - This study investigated how extra Ba2+ and two-step sintering affect the crystal structure, microstructure, and dielectric properties of (Ba, Ca)(Ti, Zr)O3 (BCTZ). XRD results indicate that no secondary phase formed in any of the BCTZ samples after sintering. Raman spectra reveal that Ca2+ ions were pushed from the Ba-site to the Ti-site when extra Ba2+ was added after sintering. The Curie temperatures of all BCTZ samples decreased due to the smaller tetragonality caused by the addition of extra Ba2+. SEM micrographs revealed that two-step sintering decreased the grain size from 5.0 μm to 0.5 μm compared with normal sintering. Furthermore, samples with fine-grain microstructures exhibited flat curves for the temperature coefficient of capacitance.

UR - https://www.scopus.com/pages/publications/84880277257

UR - https://www.scopus.com/pages/publications/84880277257#tab=citedBy

U2 - 10.1016/j.ceramint.2013.04.009

DO - 10.1016/j.ceramint.2013.04.009

M3 - Article

AN - SCOPUS:84880277257

SN - 0272-8842

VL - 39

SP - 8245

EP - 8251

JO - Ceramics International

JF - Ceramics International

IS - 7

ER -

Effects of extra Ba²⁺ and two-step sintering on the crystal structure, microstructure, and dielectric properties of (Ba, Ca)(Ti, Zr)O ₃

Abstract

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