In Situ  Thermometry Measuring Temperature Flashes Exceeding 1,700°C in 8 mol%   Y   2   O   3 ‐Stablized Zirconia Under Constant‐Voltage Heating | Zendy

Park Jungdeok | Zendy; Chen IWei | Zendy

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In Situ Thermometry Measuring Temperature Flashes Exceeding 1,700°C in 8 mol% Y 2 O 3 ‐Stablized Zirconia Under Constant‐Voltage Heating

Author(s) -

Park Jungdeok,

Chen IWei

Publication year - 2013

Publication title -

journal of the american ceramic society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.9

H-Index - 196

eISSN - 1551-2916

pISSN - 0002-7820

DOI - 10.1111/jace.12176

Subject(s) - analytical chemistry (journal) , materials science , ceramic , sintering , electrical impedance , in situ , yttria stabilized zirconia , mineralogy , chemistry , composite material , electrical engineering , cubic zirconia , chromatography , engineering , organic chemistry

Using AC impedance spectroscopy as a means of in situ thermometry, temperature runaway over 1,500°C within a few seconds was observed for the first time in dense 92 mol% ZrO 2 –8 mol% Y 2 O 3 (8 YSZ ) ceramics heated under a constant voltage. Such runaway is especially pronounced when starting from a low background temperature in samples of a small surface‐to‐volume ratio, and is expected to be commonplace during flash sintering of porous ceramic cubes or cylinders. The method of AC impedance‐based thermometry is applicable to other ceramics with a well‐defined conduction mechanism at high temperature.

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