RELATION BETWEEN UNCOMBINED QUARTZ AND THERMAL EXPANSION OF CERAMIC BODIES
RELATION BETWEEN UNCOMBINED QUARTZ AND THERMAL EXPANSION OF CERAMIC BODIES
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DOI：
10.1111/j.1151-2916.1934.tb19292.x
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发表时间：
1934-12
影响因子：
3.9
通讯作者：
W. R. Morgan
中科院分区：
文献类型：
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作者：
W. R. Morgan
利用岩相显微镜和温特沃斯螺旋测微计，通过截距法测定了15个商业页岩和耐火粘土体中未结合石英的体积百分比。当9英寸试样在电阻炉中加热时，通过测量由1/10，000英寸艾姆斯刻度盘指示的膨胀，从大气温度至1000 ℃测定商业上烧制的相同物体的热膨胀。两个机构的显微照片，显示的粒度和分布的石英;膨胀曲线也给出了，显示高方石英膨胀的身体含有低百分比的未结合的石英，和低方石英膨胀的身体含有高百分比的未结合的石英。方石英在约5度锥（约1200°C）时开始通过粘土矿物的解离形成。对于从锥体5至7烧制的坯体，在260°C下的膨胀（指示方石英的存在或不存在）与坯体中未结合的石英的百分比成反比。从565 °C到620°C的膨胀与主体中未结合的石英的百分比成正比。
The percentage by volume of uncombined quartz in each of fifteen commercial shale and fireclay bodies was determined by the intercept method by means of a petrographic microscope and a Wentworth screw-micrometer. The thermal expansion of the same bodies fired commercially was determined from atmospheric temperature to 1000°C by measurement of the expansion as indicated by a 1/l0,000-inch Ames dial when the 9-inch specimen was heated in an electric resistance furnace. Photomicrographs of two bodies are given, showing the grain size and distribution of the quartz; expansion curves are also given, showing high cristobalite expansion for the body containing a low percentage of uncombined quartz, and low cristobalite expansion for the body containing a high percentage of uncombined quartz. Cristobalite began to form by dissociation of the clay minerals at about cone 5 (approximately 1200°C). For bodies fired from cones 5 to 7, the expansion at 260°C, indicating the presence or absence of cristobalite, was inversely proportional to the percentage of uncombined quartz in the body. The expansion from 565 to 620°C was directly proportional to the percentage of uncombined quartz in the body.