国产色99_九九99靖品_久久综合一区_男女羞羞网站_ww 255hh 在线观看_亚洲伦理自拍

作者：YASUHIRO HOSHIYAMA;TOMOYUKI MAEDA;AKIRA YAMAGUCHI;

作者單位：Okayama Ceramics Research Foundation, Ryukoku University;Okayama Ceramics Research Foundation, Ryukoku University;Okayama Ceramics Research Foundation, Ryukoku University

刊名：Journal of the Technical Association of Refractories

ISSN：0285-0028

出版年：2010-01-05

卷：30

期：2

起頁：121

止頁：121

分類號：TQ175

語種：英文

關鍵詞：

內容簡介

In the case of alkaline CaO coexisting with Cr_2O_3, the production of CaCrO_4, a Cr~(6+) compound, is stimulated as the stable phase in the temperature range less than 1000°C in air atmosphere1'. On the contrary, CaCr_2O_4, a Cr~(3+)+ compound, becomes the stable phase at more than 1000°C in air atmosphere. However, in the case of the presence of Al_2O_3 together with CaO and Cr_2O_3 there is a possibility that the Cr~(6+) compound CaCrO_4 is produced even at temperatures higher than 1000°C, although there is no literature concerning details of this behavior. This research investigates the amount of Cr~(6+) compound and mineral phases generated at 1450°C in reactions between constituents in the CaO-system.