Low-Temperature Sintering of Apatite-Type Lanthanum Silicate with Fluoride Additives

Takahashi, Junichi; Honda, Hidetoshi; Akashi, Takaya et al.

Advances in Science and Technology, 2010, 62, 235-240

Permalink : https://hdl.handle.net/2115/57397

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アクセス権
open access
URI
https://hdl.handle.net/2115/57397
タイトル
Low-Temperature Sintering of Apatite-Type Lanthanum Silicate with Fluoride Additives
著者
Takahashi, Junichi ; Honda, Hidetoshi ; Akashi, Takaya ; Abe, Kazutomo ; Itoh, Hidenobu ; Kishi, Masami
e-Rad_Researcher
40110259
著者名
Takahashi, Junichi
著者名
Honda, Hidetoshi
著者名
Akashi, Takaya
著者名
Abe, Kazutomo
著者名
Itoh, Hidenobu
著者名
Kishi, Masami
言語
英語
キーワード
Lanthanum silicate
Fluoride additives
Low-temperature sintering
Oxide ion conduction
発行日
2010
出版者
Trans Tech Publications
収録物名
Advances in Science and Technology
巻(号)
62
ページ
235-240
抄録
Various fluorides (3 - 8 wt%) were added to a La9.33Si6O26 (LSO) powder synthesized by calcining the corresponding oxides mixture at 1100ºC for 4 h. The addition of BaF2, AlF3 or Ba3Al2F12 caused an appreciable and substantial increase in bulk density after sintering at 1400º and 1450ºC, respectively. These fluorides melt below 1400ºC to form liquid phase which could assist the densification at low temperatures. Abnormal grain growth was observed for LSO samples with the addition of AlF3 and Ba3Al2F12, but it was effectively suppressed by stepwise sintering at 1400º and 1450ºC. The BaF2 addition brought about the simultaneous promotion of densification and moderate grain growth, leading to the production of a densified LSO sample showing a conductivity of 1.5 x 10–2 Scm–1 at 800ºC with an activation energy of 1.23 eV.
資源タイプ
学術雑誌論文
出版タイプ
Submitted Manuscript Under Review
EISSN
1662-0356
関連情報 (isVersionOf)
出版社版DOI
https://doi.org/10.4028/www.scientific.net/AST.62.235