Development of Casting Investment Preventing Blackening of Noble Metal Alloys : Part 4: Effect of Mg(OH)_2 and Ca(OH)_2 as Additives
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概要
- 論文の詳細を見る
The objective of this study was to develop a casting investment that prevents the blackening of the cast surface of noble metal alloys. Experimental investments were prepared using a gypsum-bonded investment in which a hydroxide, namely Mg(OH)_2 or Ca(OH)_2, was added. An Ag-Pd-Cu-Au alloy was cast into the mold made of the prepared investment. The addition of both hydroxides showed a significant effect on the color of as-cast surfaces, which was improved with increase in additive content. When Mg(OH)_2 or Ca(OH)_2 was added at more than 4.0 mass% to the investment, it was useful in preventing the blackening of the as-cast surfaces of an Ag-Pd-Cu-Au alloy. As for differences in the effects between Mg(OH)_2 and Ca(OH)_2, they were not found.
- 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 Life Dentistry At Niigata The Nippon Dental Univers
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Ogura Hideo
Department Of Dental Materials Science
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Nakai Akira
Department Of Dental Materials Science School Of Life Dentistry At Niigata The Nippon Dental Univers
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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 Applied Chemistry, Faculty of Engineering, Okayama University
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