CALCINATION STUDIES OF MAGNESIUM OXIDES
CALCINATION STUDIES OF MAGNESIUM OXIDES
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DOI：
10.1111/j.1151-2916.1951.tb11644.x
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发表时间：
1951-01-01
影响因子：
3.9
通讯作者：
EUBANK, WR
中科院分区：
文献类型：
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作者：
EUBANK, WR
碳酸镁、碱式碳酸镁和氢氧化物在300°c至2000°c的温度下煅烧，时间从低温下120小时到高温下几分钟不等。用X射线粉末衍射、电子显微镜和岩石显微镜对所得氧化镁进行了研究。仅观察到MgO的立方、方长石、晶体结构。然而，对于低温煅烧得到的氧化物，注意到单元电池的尺寸略有增加。镁化合物的煅烧分为两个不同的步骤：(1)在300°至500°C的温度下损失气体；(2)在900°C以上的温度下再结晶或烧结。在较低的温度下，气体的损失留下了一个非常多孔的结构，具有很大的内表面积和很大的反应性（吸附能力）。晶格膨胀和缺陷被认为是观测到的性质的部分原因。
Magnesium carbonate, basic carbonate, and hydroxide were calcined at temperatures of 300° to 2000°C. for periods ranging from 120 hours at the low temperatures to a few minutes at the higher ones. The resulting magnesium oxides were studied by means of X‐ray powder diffraction and electron and petrographic microscopy. Only the cubic, periclase, crystal structure for MgO was observed. A small increase in the size of the unit cell was noted, however, for oxides obtained by low‐temperature calcination. Calcination of magnesium compounds was observed to take place in two distinct steps: (1) loss of gases at temperatures of 300° to 500°C. and (2) recrystallization or sintering at temperatures above 900°C. At the lower temperatures the loss of gases leaves a very porous structure with a large internal surface area and great reactivity (adsorptive power). Lattice dilation and imperfection is considered to account in part for the observed properties.