Ultra5ne nickel ferrite powders of 10 nm in particle size were prepared by the calcination of gel powders of coprecipitated Niand Fe-containing tartates at 2503 to 4003C/2 h. The gel powder was a mixture of Ni and Fe tartrates exhibiting characteristics of the individual salts. The mixing homogeneit
Preparation and properties of ultrafine composite powders of Fe3O4 and Ni/MICA
β Scribed by Yucheng Wu; Jiaqin Liu; Rujun Xue; Guozhong Wang; Lide Zhang
- Publisher
- Elsevier
- Year
- 2005
- Tongue
- English
- Weight
- 399 KB
- Volume
- 3
- Category
- Article
- ISSN
- 1672-2515
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β¦ Synopsis
This paper presents the preparation of ultrafine powders of Fe 3 O 4 and Ni by a chemical method, followed by mixing the prepared powders with mica and other ultrafine powders for synthesizing microwave absorption coatings. The microwave attenuation rate of the coatings was measured by the Microwave Network Analyzer in the frequency range of 8-12 GHz at room temperature. The results indicate that microwave could be absorbed by the coatings with an effectiveness strongly dependent on the powder sort and content and the coating thickness.
π SIMILAR VOLUMES
By altering the preparation conditions, systematic variation of Fe,00\_xB~ ultrafine amorphous powders with 29 6 x ~< 40 has been realized by the chemical reduction method. The preparation mechanism, the co-deposition of iron and boron atoms with boron atoms to stabilize the amorphous structure, was