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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Grog (clay) ： ウィキペディア英語版 Grog (clay) Grog, also known as firesand and chamotte, is a ceramic raw material. It has high percentage of silica and alumina. It can be produced by firing selected fire clays to high temperature before grinding and screening to specific particle sizes. It can also be produced from pitchers. The particle size distribution is generally coarser in size than the other raw materials used to prepare clay bodies. It tends to be porous and have low density. It is normally available as a powder or chippings. ==Properties== Grog is composed of: 40% minimum alumina, 30% minimum silica, 4% maximum Iron(III) oxide, 2% maximum of calcium oxide and magnesium oxide combined.〔.〕 Its melting point is approximately . Its water absorption is 7% maximum. Its thermal expansion coefficient is 5.2 mm/m and thermal conductivity is 0.8 W/(m·K) at 100 °C and 1.0 W/(m·K) at 1000 °C. It is also not easily wetted by steel.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Grog (clay)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.