Preparation and Electric Properties of Dense Nanocrystalline Zinc Oxide Ceramics

• Published in: Journal of the American Ceramic Society Vol. 85; no. 4; pp. 1016 - 1018
• Main Authors: Gao, Lian, Li, Qiang, Luan, Weiling, Kawaoka, Hirokazu, Sekino, Tohru, Niihara, Koichi
• Format: Journal Article
• Language: English
• Published: Westerville, Ohio American Ceramics Society 01.04.2002; Blackwell; Wiley Subscription Services, Inc
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics, piezoelectrics, and ferroelectrics and their properties; electrical properties; Electrotechnical and electronic ceramics; Elements, oxides, nitrides, borides, carbides, chalcogenides, etc; Exact sciences and technology; nanomaterials; Physics; Technical ceramics; zinc oxide; Plasma; Densification; Voltage current curve; Electrical properties; Zinc Oxides; Experimental study; Oxide ceramics; Spark discharge; Sintering; Manufacturing; Microstructure; Nanocrystal; Electrical impedance
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1151-2916.2002.tb00214.x

This communication reports on the preparation and electric properties of dense nanocrystalline ZnO ceramics. By spark plasma sintering, nanocrystalline (∼100 nm) ZnO ceramics with a high density of 98.5% were obtained at a very low temperature of 550°C. Electric property measurement revealed a novel conduction nonlinearity in the sample sintered at 500°C. This phenomenon is due to the nanometerization of ZnO crystal and the grain boundary layer with an amorphous interfacial layer.