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    Microstructure and electrical properties of ZnO-based varistors prepared by high-energy ball milling

    ZnO-based varistor ceramics were prepared at sintering temperatures ranging from 900 °C to 1,300 °C, by subjecting the mixed oxide powders to high-energy ball milling (HEBM) for 0, 5, 10 and 20 h, respectively...

    Hong-Yu Liu, Hui Kong, Xue-Ming Ma, Wang-Zhou Shi in Journal of Materials Science (2007)