オーケナイトのケイ酸イオンの構造と熱分解過程

概要

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The silicate anion structure and thermal decomposi tion behavior of okenite were studied mainly using solid ^<29>Si NMR. The silicate anion structure of okenite is very close to some parts of the sheet structure of gy rolite. Dehydration occurs at around 119 and 315℃ which are caused by the decomposition of the double chain and sheet structure, and the sheet structure, respectivly. Although, the dehydration is caused by the water in the interlayer of okenite, and the main silicate anion structure remains untin around 350℃ From 350 to 700℃, the silicate anion structure decompose grad ually as the temperature increases and many kinds of silicate anions are formed from the double chain and the sheet structure of okenite. By the thermal treat ment above 800℃, wollastonite, pseudo wollastonite and amorphous silica are formed and pseudo wol lastonite, cristobalite, quartz and silica glass are formed over 1200℃
社団法人日本セラミックス協会の論文
1994-10-01