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http://hdl.handle.net/11133/3134
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Title: | Sr-ヘキサセルシアン焼結体の作製と単斜晶系への相転移 |
Other Titles: | Sr-ヘキサセルシアン ショウケツタイ ノ サクセイ ト タンシャ ショウケイ エノ ソウテンイ Preparation of Dense Sr-hexacelsian ceramics and phase transition to Celsian |
Authors: | 小林, 雄一 片山, 正貴 阿部, 文香 KOBAYASHI, Yuichi KATAYAMA, Masaki ABE, Fumika |
Issue Date: | 23-Sep-2016 |
Publisher: | 愛知工業大学 |
Abstract: | In order to develop dense Sr-hexacelsian and Sr-celsian ceramics, amorphous materials (nSrO-Al[2]O[3]-2SiO[2],n = 1.0 -1.2) prepared by calcining the mixtures of elutriated pure kaolin with strontium carbonate were pressed and heat-treated between 900 and 1200℃. Heat-treatment of the reactive amorphous powders above 950℃ produced densely sintered hexacelsian ceramics and phase transition of hexacelsian to celsian was observed at higher heat-treatrnent temperatures. With the increase in n value,transition temperature lowered from 1100 to 1000℃. When the stoichiometric specimens( n = 1.0) were heat-treated above 1150℃, cracks appeared at the surface of specimens owing to the phase transition of hexacelsian to celsian. Increase in n value above 1.1 depressed the crack formation and gave a crack-free polycrystals. |
URI: | http://hdl.handle.net/11133/3134 |
Appears in Collections: | 18号
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