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Citation: Hu Ruisheng, Shen Yuenian, Kong Fanqing. The Effects of Calcination Temperature on the Structure, Conductivity and Catalytic Activities of La₂O₃-NiO System[J]. Chinese Journal of Applied Chemistry, ;1998, 15(4): 80-82. shu

The Effects of Calcination Temperature on the Structure, Conductivity and Catalytic Activities of La₂O₃-NiO System

Department of Chemistry, Inner Mogolia University, Hohhot 010021

Received Date: 15 October 1997
Revised Date: 22 April 1998

The phase structure of La₂O₃-NiO system at various calcination temperatures have been studied by XRD and DTA-TG techniques. It is found that at 450-600℃ there are mixed phases of La₂O₃ and NiO and at 800~900℃ only a single phase of perovskite LaNiO₃. The conductivity of the system increases with the increase in calcination temperature. At temperature 600~800℃ a sudden change of the conductivity occurred in correspondence with the phase transformation of the system. The catalytic activities of the system calcinated at 600℃ and 800℃ also show a distinct "activity gap" for CO methanation and xylene combustion.
- La₂O₃-NiO,
- calcination temperature,
- conductivity,
- catalytic activity
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The Effects of Calcination Temperature on the Structure, Conductivity and Catalytic Activities of La₂O₃-NiO System