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The microstructure and electrical properties of the Pr6O11‐based varistor ceramics composed of Pr6O11–Sb2O3 ceramics were investigated in the Sb2O3 content range 0–5.0 mol%. The samples were fabricated by conventional ceramic techniques. The results demonstrated that the addition of Sb2O3 to Pr6O11 can promote the grain growth and the densification of the Pr6O11‐based ceramics. The average grain size...
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