Cation Distribution in Ultrafine Cadmium Ferrite Particles Determined by X-ray Diffraction.
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- Yokoyama Masaru
- Dept. of Mat. Sic., Fac. Of Sci. & Tech., Keio Univ.
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- Sato Tetsuya
- Dept. of Inst. Eng., Fac. of Sci. & Tech., Keio Univ.
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- Ohta Eiji
- Dept. of Mat. Sic., Fac. Of Sci. & Tech., Keio Univ.
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- Sato Toshihiko
- Dept. of Elec., Fac. of Eng., Tokyo Engineering Univ.
Bibliographic Information
- Other Title
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- Ｘ線回折による超微粒子カドミウムフェライトのイオン配置
- Xセン カイセツ ニヨル チョウ ビリュウシ カドミウム フェライト ノ イオ
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Abstract
Cation distribution, oxygen parameter and thermal parameter for bulk material and fine particles of CdFe2O4 were determined by X-ray powder diffraction based on the relation between In(Iobs/Ical) and sin2θ/λ2, where Iobs is the observed intensity, Ical is the calculated intensity, θ is the Bragg angle, and λ is the X-ray wavelength. The occupancy of Fe3+ ions at the A-sites is 0.06 and 0.13 for bulk material and fine particles with a size of-7 or-8nm, respectively. The cluster consisting of small number of Fe3+ ions at the B-sites are formed around a Fe3+ ion at the A-site through the A-B interactions. The oxygen parameters of the fine particles with size of-7 and -8 nm and the bulk material are 0.385, 0.389 and 0.391, respectively. The thermal parameters of the fine particles are approximately eighty times larger than that of the bulk material. The enhanced thermal parameter can be explained in terms of the softening on the surface.
Journal
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- Journal of the Japan Society of Powder and Powder Metallurgy
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Journal of the Japan Society of Powder and Powder Metallurgy 44 (1), 111-115, 1997
Japan Society of Powder and Powder Metallurgy
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Details 詳細情報について
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- CRID
- 1390282681283691008
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- NII Article ID
- 10002013378
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- NII Book ID
- AN00222724
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- ISSN
- 18809014
- 05328799
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- NDL BIB ID
- 4118708
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed
