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Findings from S. Charles et al Has Provided New Information about Applied Ceramics (High field ZnO varistors prepared by spark plasma sintering)

July 8, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Current study results on Applied Ceramics have been published. According to news reporting from London, United Kingdom, by VerticalNews journalists, research stated, "ZnO varistors with submicrometre and nanoscaled microstructures and enhanced electrical properties were prepared by spark plasma sintering (SPS). The densification, grain size and switch field of the varistors were compared with those of hot pressed material."

The news correspondents obtained a quote from the research, "The switching field increased with decreasing grain size, and very rapidly below 500 nm. Switching fields up to 180 kV cm(-1) were obtained for ceramics with submicrometre grain sizes (380 nm). This is nearly two orders of magnitude higher than those currently reported for commercial ZnO varistors. A nano powder, prepared by high energy milling, was sintered to a high density at much lower temperatures compared with the submicron powders and had a nanoscale grain size (45 nm)."

According to the news reporters, the research concluded: "The nanoceramic broke down dielectrically under very high fields (>260 kV cm(-1)) before a varistive response was apparent."

For more information on this research see: High field ZnO varistors prepared by spark plasma sintering. Advances in Applied Ceramics, 2014;113(2):94-97. Advances in Applied Ceramics can be contacted at: Maney Publishing, Ste 1C, Josephs Well, Hanover Walk, Leeds LS3 1AB, W Yorks, England.

Our news journalists report that additional information may be obtained by contacting S. Charles, Nanoforce Technol Ltd, London E1 4NS, United Kingdom. Additional authors for this research include J. Evans, M.J. Reece and H.X. Yan.

Keywords for this news article include: London, Europe, United Kingdom, Applied Ceramics

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Source: Journal of Technology

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