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Citation: Zhu Bo, Chen Min, Yuan Xian-Xin, Jin Song-Shou, Lv Guang-Lie, Wu Hong-Li. Effect of K⁺、Al³⁺on the Structure of Zn-Co-O System bu the Rietveld Structure Refinement[J]. Acta Physico-Chimica Sinica, ;1995, 11(02): 135-141. doi: 10.3866/PKU.WHXB19950208 shu

Effect of K⁺、Al³⁺on the Structure of Zn-Co-O System bu the Rietveld Structure Refinement

1.
Catalysis Institute,Hangzhou University,Hangzhou 310028

Received Date: 7 January 1994
Available Online: 15 February 1995

The effect of addition of K+ 、Al3+ on the structure of Zn-Co-O system was investigated by means of the Rietveld structure refinement. The results of Rietveld analysis show that there is a spinel phase (AB2O4) and a solid solution phase [(CoxZn1-x)O] in samples Ⅰ, Ⅱ and Ⅲ. The addition of K+ and Al3+ enhance the spinel phase content, while produce opposite effect on the bond valence of cations, the oxygen parameter, and the bond distance of the tetrahedra and the octahedra. The effect of addition of K+ and Al3+ on the oxygen parameters may be closely related to the oxygenous activities. According to the bond valence theory and the trend of the occupying site A or B by the cations and the Crystal Field Theory, it is supposed the spinel [ZnmCo(1-m)2+]Co23+O4 was produced in sample Ⅰand Ⅱ, and the spinel [ZnmCo(1-m)2+] [Con3+Al(1-n)]2O4 was formed in sample Ⅲ.
- Rietveld structure refinement,
- Structure of spinel,
- Oxygenous activity
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Effect of K+、Al3+on the Structure of Zn-Co-O System bu the Rietveld Structure Refinement

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Effect of K⁺、Al³⁺on the Structure of Zn-Co-O System bu the Rietveld Structure Refinement