Development of Casting Investment Preventing Blackening of Noble Metal Alloys Part 3. Effect of Reducing Agent Addition on the Strength and Expansion of the Investments
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概要
- 論文の詳細を見る
Different reducing agents (B, Al, Si and Ti) were individually added to two gypsum-bonded investments to prepare investments preventing surface blackening of some noble cast alloys. The effect of different additive contents on green-body and burnout compressive strength, setting and thermal expansion of the investments were evaluated. The strength and expansion of the investments were changed by the additives. The compressive strength of Al-, Si- and Ti-added investments decreased with the increase of additive contents. The burnout strength of B-added investments significantly increased while green-body strength remained unchanged. The setting expansion of the B-added investments increased while those of the Al-, Si- and Ti-added investments decreased with the increase of additive contents. The thermal expansion of the Si- and Ti- added investments decreased, and that of the Al- and B-added investments remained unchanged. Further study is necessary to evaluate the effects of these additives on the accuracy of dental castings.
- 日本歯科理工学会の論文
著者
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OGURA Hideo
Department of Dental Materials Science, School of Dentistry at Niigata, The Nippon Dental University
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Nakai Akira
日本歯科大学新潟歯学部 歯科理工学講座
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NAKAI Akira
Department of Dental Materials Science, School of Dentistry at Niigata, The Nippon Dental University
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Ogura H
Department Of Dental Materials Science School Of Life Dentistry At Niigata The Nippon Dental Univers
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Ogura Hideo
Nippon Dental Univ. Niigata Jpn
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Ogura Hideo
Department Of Dental Materials Science
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Nakai A.
Dept. Of Dent. Mater. Sci. Sch. Sch. Of Dentistry At Niigata The Nippon Dental Univ.
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Nakai A
Department Of Dental Materials Science School Of Dentistry At Niigata The Nippon Dental University
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MENG Yukun
Department of Dental Materials Science, School of Dentistry at Niigata, The Nippon Dental University
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Meng Yukun
Department Of Dental Materials Science School Of Dentistry At Niigata The Nippon Dental University
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Nakai Akira
Department Of Biochemistry And Molecular Biology Yamaguchi University Graduate School Of Medicine
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Nakai Akira
Department Of Dental Materials Science School Of Dentistry At Niigata The Nippon Dental University
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Ogura Hideo
Department Of Dental Materials Science School Of Dentistry At Niigata The Nippon Dental Univ. Japan
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OGURA Hideo
Department of Dental Materials Science, School of Life Dentistry at Niigata, The Nippon Dental University
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Nakai Akira
Department of Applied Chemistry, Faculty of Engineering, Okayama University
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