Effect of Preparation Temperature on the Lattice Parameter of Nickel Aluminate Spinel |
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| Authors: | Yong Sheng Han Jian Bao Li Xiao Shan Ning Bo Chi |
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| Affiliation: | State Key Laboratory of New Ceramic and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | Nickel aluminate spinels were prepared by solid-state reaction. Their lattice parameters ( a 0) changed with preparation temperature, which was explained by cation distribution, vacancies formation, and cation entrance. When the preparation temperature increased from 1100° to 1200°C, a 0 decreased with temperature as the result of the uptake of Al2O3. After 1200°C, a 0 increased to temperature, which was attributed to some Ni2+ exchange with tetrahedral sites and some vacancies occupancy by Ni2+ and Al3+. |
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| Keywords: | ceramic products spinels X-ray methods |
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