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- W1994580077 abstract "Doped nanocrystalline zinc oxide powder with particle sizes ranging from 30 nm to 200 nm was synthesized by spray pyrolysis technique. The powder after calcination at 750 °C was consolidated and sintered using microwaves by employing different sintering schedules. The effect of heating rate on the density and electrical properties was studied. An optimized sintering temperature of 1100 °C was employed to obtain well-densified samples by both microwave and conventional processing. The sintered disks were characterized for their densities, microstructure, phase composition by X-ray diffraction and varistor properties like breakdown voltage, leakage current and non-linearity coefficient. The electrical properties obtained using microwave sintering technique was compared with those obtained on a conventionally sintered material as well as those of a commercially available product. The microwave sintered doped nanocrystalline ZnO yielded 98% dense bodies and a breakdown voltage of 9.6 kV cm−1, a leakage current of 0.25 μA cm−2 and a coefficient of non-linearity of 70 when compared to 4.3 kV cm−1, 1.2 μA cm−2 and 118 as measured for a conventionally sintered compact." @default.
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- W1994580077 date "2009-06-01" @default.
- W1994580077 modified "2023-10-18" @default.
- W1994580077 title "Microwave sintering of doped nanocrystalline ZnO and characterization for varistor applications" @default.
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- W1994580077 doi "https://doi.org/10.1016/j.matchemphys.2009.02.015" @default.
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