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Citation: Liu Yong, Wang Jing-Xian, Yang Zhu-Xian, He A-Di, Chen Xiao-Yin. Thermal Stabilization of Barium on the Alumina at High Tempeiature[J]. Acta Physico-Chimica Sinica, ;2000, 16(06): 533-537. doi: 10.3866/PKU.WHXB20000611 shu

Thermal Stabilization of Barium on the Alumina at High Tempeiature

1.
Department of Environmental Science and Engineering,Fudan University,Shanghai 200433

Received Date: 13 September 1999
Available Online: 15 June 2000

The thermal stabilization mechanism of barium and the effects of preparation methods, barium content and calcination temperature were studied by BET specific surface area and powder X ray diffraction. It was found that barium can stabilize the alumina at high temperature (≥1000 ℃) and the stabilization effect was enhanced with the increase of the barium content, whereas, the overabundance weakened the stabilization effect. The preparation methods influenced the thermal stability of alumina and the stabilization effect of barium. At high temperature, the stabilization effect of barium species can be attributed to the dispersed baria and not hexaaluminate retarding the loss of specific surface area due to the sintering and α phase transformation within the initial 1 h of the calcination process.
- Alumina,
- Thermal stability,
- Barium,
- Modification
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