Magnetic Properties and High Thermal Conductivity of Al₂O₃ Ceramics Prepared by Spark Plasma Sintering

Abstract:

The Al₂O₃ ceramics with high thermal conductivity prepared the spark plasma sintering (SPS) technology. The structure, image and magnetic properties of the SPS Al₂O₃ ceramics was characterized by X-ray, field emission scanning electron microscope (FE-SEM) and the vibrating sample magnetometer (VSM) at room temperature. The results shown that the average grain size of the Al₂O₃ ceramics is about 5~15μm, the thermal conductivity of Al₂O₃ ceramics up to 24.928 W/(m·K), and the remanent magnetization as higher as 0.00546emu/g and the saturation magnetization as higher as 0.0321 emu/g, respectively. The room-temperature ferromagnetism, which is different from the traditional, possibly originates from the oxygen vacancies.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 512-516
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.512
• Online since: August 2013
• Authors: Zhen Hua Jia, Xin Gui Tang, Donge Chen, Jun Bo Wu, Qiu Xiang Liu
• Keywords: Al₂O₃ Ceramics, Magnetic Property, Spark Plasma Sintering (SPS), Thermal Conductivity (TC)

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