Research on grain composition, grain size and electrical conductivity of the CuCr1-xMgxO2 (0 ≤ x ≤ 0.08)

Yanyan Tang; Yiding Hu; Yi Li; Haorong Wu; Liangwei Chen; Lan Yu

doi:10.36410/jcpr.2021.22.5.543

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자료유형: 학술저널

저자정보: Yanyan Tang (Kunming University of Science and Technology) Yiding Hu (Kunming University of Science and Technology) Yi Li (Kunming University of Science and Technology) Haorong Wu (Kunming University of Science and Technology) Liangwei Chen (Kunming University of Science and Technology) Lan Yu (Kunming University of Science and Technology)

저널정보: 한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제22권 제5호

발행연도: 2021.10

수록면: 543 - 546 (4page)

DOI: 10.36410/jcpr.2021.22.5.543

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A series of layered CuCr1-xMgxO2 (0 ≤ x ≤ 0.08) polycrystalline ceramics were prepared. The effects of substituting Mg2+cations for Cr3+ cations on the grain composition, grain size, grain quantity, and electrical conductivity were investigated. When x = 0?0.04, the distinct layered structure grain grew rapidly with the increase of magnesium in the composition, andthe average grain size increased from 2.5 μm (x = 0) to 15 μm (x = 0.04) due to the decrease of activation energy. Furthermore,the bulk density and lattice constant also reached the maximum and minimum values of 4.367 g/cm3 and 17.083 respectivelyat x = 0.04. When x = 0.05?0.08, the average grain size slightly decreased due to the grown-up second-phase MgCr2O4hindering of grain growth. The results showed that the average size of the second-phase MgCr2O4 had reached 1.3 μm whenx = 0.04. In general, the larger the grain size of polycrystalline ceramics, the more defects in the grain boundaries, and thebetter its electrical conductivity. Therefore, the solid-phase reaction, which can obtain larger grain size and more grainboundary defects, was chosen here to prepare CuCr1-xMgxO2 polycrystalline ceramics, so as to obtain a highly conductiveCuCr1-xMgxO2 ceramic material. The minimum resistivity of the obtained CuCr0.6Mg0.4O2 polycrystalline ceramic is only 0.091Ω·cm, which is of great significance for the development of transparent conductive oxides.

#CuCr1-xMgxO2 grain composition grain size grain quantity electrical conductivity

참고문헌 (16)

참고문헌 신청

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