Post Sintering of Apatite Ceramics from Fine Powders Synthesized under Hydrothermal Conditions
Post Sintering of Apatite Ceramics from Fine Powders Synthesized under Hydrothermal Conditions
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水热条件下合成细粉磷灰石陶瓷的后烧结
DOI：
10.2109/jcersj.96.109
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发表时间：
1988
影响因子：
1.1
通讯作者：
S. Sōmiya
中科院分区：
文献类型：
--
作者：
K. Ioku;M. Yoshimura;S. Sōmiya
以（NH 4）2 HPO 4和Ca（NO3）2为原料，采用湿法制备羟基磷灰石微粉，在200 ℃、2 MPa条件下水热处理10 h。所得90 nm × 25 nm的单晶细粉在空气中于1000 ~ 1100°C烧结3 h。所得陶瓷的相对密度为73±2%（1000°C）-92 ± 2%（1100°C），在1000°C、200 MPa的Ar气氛下进行热等艾德处理1小时，无任何胶囊。后烧结使致密化达到99%以上的样品具有封闭的孔隙，但它几乎没有增加样品的密度与较低的密度。采用热等静压法制备了透明磷灰石陶瓷。
Hydroxyapatite fine powders prepared from (NH4)2HPO4 and Ca(NO3)2 by a wet method were treated under hydrothermal conditions at 200°C under 2MPa for 10h. The obtained single-crystal fine powders of 90nm×25nm were sintered in air at a temperature from 1000° to 1100°C for 3h. The obtained ceramics with relative densities of 73±2% (1000°C)-92±2% (1100°C) were HIP'ed at 1000°C under 200MPa of Ar for 1h without any capsules. The post-sintering brought about densification up to 99% for the samples more than 90% dense having closed pores, but it barely increased the density of samples with lower densities. Transparent apatite ceramics were obtained by HIP.