HIP sintering of fine grained barium titanate

Kazumasa Oonishi, Takashi Morohashi, Kenji Uchino

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Pure fine-grained barium titanate powder with a particle size of 0.1 μm was sintered by the HIP (Hot Isostatic Pressing) method using a platinum capsule. HIP is an effective process for sintering barium titanate for reducing the sintering temperature and grain size. The densification proceeded at the HIP temperature 800°C under the pressure of 500 MPa. The HIP sintered fine-grained barium titanate exhibited a lower dielectric constant and broader temperature characteristics at the Curie point than that for a normal-sintered sample. A close relationship was obtained between the dielectric constant and the HIP treatment temperature. With lowering the HIP treatment temperature or time, both the dielectric constant and the peak temperature of the dielectric constant decreased.

Original languageEnglish (US)
Pages (from-to)473-477
Number of pages5
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume97
Issue number4
StatePublished - 1989

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hot isostatic pressing
Barium titanate
Hot isostatic pressing
barium
sintering
Sintering
Permittivity
permittivity
Temperature
temperature
capsules
densification
Platinum
Densification
Powders
Capsules
platinum
grain size
Particle size

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

Cite this

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HIP sintering of fine grained barium titanate. / Oonishi, Kazumasa; Morohashi, Takashi; Uchino, Kenji.

In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 97, No. 4, 1989, p. 473-477.

Research output: Contribution to journalArticle

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AU - Oonishi, Kazumasa

AU - Morohashi, Takashi

AU - Uchino, Kenji

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AB - Pure fine-grained barium titanate powder with a particle size of 0.1 μm was sintered by the HIP (Hot Isostatic Pressing) method using a platinum capsule. HIP is an effective process for sintering barium titanate for reducing the sintering temperature and grain size. The densification proceeded at the HIP temperature 800°C under the pressure of 500 MPa. The HIP sintered fine-grained barium titanate exhibited a lower dielectric constant and broader temperature characteristics at the Curie point than that for a normal-sintered sample. A close relationship was obtained between the dielectric constant and the HIP treatment temperature. With lowering the HIP treatment temperature or time, both the dielectric constant and the peak temperature of the dielectric constant decreased.

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