Effect of temperature on X-ray, IR and magnetic properties of nickel ferrite prepared by oxalate co-precipitation method
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- 作者：R. M. More ; T. J. Shinde ; N. D. Choudhari and P. N. Vasambekar
- 刊名：Journal of Materials Science: Materials in Electronics
- 出版年：2005
- 出版时间：November 2005
- 年：2005
- 卷：16
- 期：11-12
- 页码：721-724
- 全文大小：1,154 KB
文摘
Polycrystalline Nickel ferrite was synthesized by oxalate co-precipitation method at different sintering temperatures (700, 800, 900, 1000 and 1100¡ãC) and characterized by X-ray diffraction and far IR absorption techniques. The lattice parameter (a), A-site and B-site radii (rA, rB) were computed. XRD shows the formation of single phase cubic spinel structure. The crystallite sizes are calculated by Scherrer formula. The crystallite size is found to be increasing with sintering temperature. Porosity and Bond lengths on A-site and B-site were calculated and found to be minimum for the sample sintered at 800¡ãC. The Far IR absorption bands are observed around 600 cm−1 and 400 cm−1 on the tetrahedral and octahedral sites respectively. Magnetization parameters such as saturation magnetization (Ms), magnetic moment (nB) were calculated and the results are discussed with the help of existing theories. Saturation magnetization was found to be 47.85 emu/gm for the sample sintered at 1100 ¡ãC. Physical densities are obtained by Archimedes principle and are found to be 97.36 % of their corresponding X-ray densities.