Affect of Powder Characteristics on the Sinterability of Calcium Hydroxyapatite
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- ASADA Masayuki
- Graduate School of Science, Okayama University
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- OUKAMI Katsutoshi
- Central Research Laboratories, Kuraray Co., Ltd.
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- NAKAMURA Seishiro
- Central Research Laboratories, Kuraray Co., Ltd.
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- TAKAHASHI Katsuaki
- Department of Industrial Chemistry, School of Engineering, Okayama University
Bibliographic Information
- Other Title
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- カルシウムヒドロキシアパタイト粉末の特性とその焼結性
- カルシウムヒドロキシアパタイト フンマツ ノ トクセイ ト ソノ ショウケツセ
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Abstract
Influence of powder characteristics such as specific surface area, agglomerate size and shape, on their microstructures and mechanical properties of green and sintered bodies was studied for seven kinds of calcium hydroxyapatites. A heat treatment above 1300°C gave tricalciumphosphate (TCP) for all powders. Before the formation of TCP, decarbonation took place in carbonate-containing powders above 800°C, while carbonate-free powders were stable up to 1200°C. Powders with high specific surface areas (SSA), especially larger than 40m2/g, had good sinterabilities, and gave dense bodies about 99% relative density after a heat treatment at 1200°C. On the contrary, powders with lower SSA, about 10m2/g, had poor sinterabilities and gave porous bodies. Poor sinterability was mainly ascribed to the stability and needle like shape of the crystallites. Furthermore, presence of large voids among the agglomerates prevented densification of the compacts at the late stage of sintering. The high density Ca-HAP ceramics prepared in this report have mechanical properties comparable with those reported in the literatures.
Journal
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- Journal of the Ceramic Association, Japan
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Journal of the Ceramic Association, Japan 95 (1103), 703-709, 1987
The Ceramic Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001205249832448
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- NII Article ID
- 110002313671
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- NII Book ID
- AN00245650
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- ISSN
- 18842127
- 00090255
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- NDL BIB ID
- 3143915
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed