巻号一覧
37 巻 (1997 - 1998)
- 4 号 p. 137-
- 3 号 p. 87-
- 2 号 p. 37-
- 1 号 p. 1-
37 巻, 1 号
選択された号の論文の2件中1～2を表示しています
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中道 俊久1997 年 37 巻 1 号 p. 1-9
発行日: 1997/07/31
公開日: 2011/09/20
ジャーナル フリーIn KUTANI industry, it has been a serious problem why the overglaze color often peels off from porcelain bodies after muffle firing.
In this study, some numerous glazes of different chemical compositions were tested to select the most stable glaze composition. It was found out that the softening temperature of the glaze, which depends on its chemical composition, was one of the most important factors in controlling the peeling off of overglaze color. This means that the softening temperature of overglaze must be higher than the firing temperature of overglaze colors, that is to say, 800°C, so as to avoid any peeling problem. From the result, the range of the most stable glaze composition in Seger formula was as follows;
0.6 KNaO 0.76-0.84 Al2O3 5.5-6.5 SiO2
0.4 CaO
SEM observations support this result.抄録全体を表示PDF形式でダウンロード (3313K) -
生駒 修治, 花木 昭, 藤峰 祐子1997 年 37 巻 1 号 p. 10-16
発行日: 1997/07/31
公開日: 2011/09/20
ジャーナル フリーMontmorillonite containing exchangeable cations such as alkali and alkaline earth metal ions formed complexes with water and ethylene glycol between the silicate layers. These molecules formed one or two layers depending on the polarizing power of the ion (P) as have been defined as a ratio of ionic charge to radius in Å. Therefore the complex formation was drived by the co-ordination of these polar molecules to the cations. Large univalent ions such as K+, Rb+ and Cs+possessing the value of P below unity formed a single-layer complex in the interlayers, while the others with the value above unity a double-layer one. Ethylene glycol molecules co-ordinated to the large cations seem to be orientated less regularly in the interlayer spaces. The stronger the polarizing power of the ion became, the more the molecules between the layers were stabilized thermally.抄録全体を表示PDF形式でダウンロード (842K)
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