Preparation of rare-earth-modified medical stone powders and their application as conductive fillers

Li-ying Qi; Su-e Hao; Tian-cheng Sun

doi:10.1007/s12613-019-1731-y

Volume 26 Issue 2

Feb. 2019

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2019 > 26(2): 260-266

Li-ying Qi, Su-e Hao, and Tian-cheng Sun, Preparation of rare-earth-modified medical stone powders and their application as conductive fillers, Int. J. Miner. Metall. Mater., 26(2019), No. 2, pp. 260-266. https://doi.org/10.1007/s12613-019-1731-y

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Li-ying Qi, Su-e Hao, and Tian-cheng Sun, Preparation of rare-earth-modified medical stone powders and their application as conductive fillers, Int. J. Miner. Metall. Mater., 26(2019), No. 2, pp. 260-266. https://doi.org/10.1007/s12613-019-1731-y

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Research Article

Preparation of rare-earth-modified medical stone powders and their application as conductive fillers

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Corresponding author:
Su-e Hao E-mail: haosue@hit.edu.cn
Received: 17 March 2018; Revised: 15 July 2018; Accepted: 21 September 2018

Abstract

Abstract

Traditional metal conductive fillers are expensive and prone to oxidation. Thus, the development of new conductive powders as fillers is urgently needed. A novel gaseous penetration technology was adopted to prepare La-doped medical stone powders (La-MSPs), which are inexpensive mesoporous materials, as a new kind of conductive filler material. The prepared La-MSPs attained a resistivity of 450 Ω·m and were used as a filler to prepare conductive coatings with epoxy resin as the resin matrix. The influence of the La-MSPs dosage on the resistance and hardness of the coatings was also determined. The resistance and the hardness both decreased with increasing filler dosage. Finally, the optimum recipe of the conductive coatings with the most suitable fillers dosage (55wt%) was obtained. The hardness and resistance of the coatings with 55wt% La-MSPs were HV 4 and 5.5×10⁷ Ω, respectively.
- chemical engineering;
- conductive materials;
- rare earths;
- medical stone powders;
- gaseous penetration technology

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