热处理纯氧化钴和掺杂氧化钴的结构变化和表面性能

Surface Technology Pub Date : 1985-11-01 DOI:10.1016/0376-4583(85)90119-0

Awad I. Ahmed , Th. El-Nabarawy

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引用次数: 2

摘要

在- 196°C下，通过氮吸附对钴氧化物和掺杂锂和铁的钴氧化物进行了表面积测量。在250 ~ 1000℃的温度范围内煅烧得到热产物。通过差热分析(DTA)和x射线技术研究了其结构和相变化。样品的差热分析表明，在250 ~ 700℃的空气中加热纯氢氧化钴和掺杂氢氧化钴，产生Co3O4。当加热温度提高到800℃时，形成CoO。在低于500℃的温度下得到的脱水产物在x射线下是无定形的。掺杂外来离子会导致母体固体的结构变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Structural changes and surface properties of thermally treated pure and doped cobalt oxide

Surface area measurements were carried out by nitrogen adsorption at —196 °C on cobalt oxide and on lithium- and ferric-doped cobalt oxides. Thermal products were obtained by calcination in the temperature range 250–1000 °C. Structural and phase changes were studied by differential thermal analysis (DTA) and X-ray techniques.

DTA of samples showed that heating of the pure and doped cobalt hydroxide in air in the temperature range 250–700 °C yields Co₃O₄. On increasing the heating temperature to 800 °C CoO is formed. The dehydration products obtained at temperature less than 500 °C were amorphous to X-rays. Doping with foreign ions causes textural changes in the parent solid.

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Surface Technology

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