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Onset Criterion for Flash Sintering
Author(s) -
Dong Yanhao,
Chen I.Wei
Publication year - 2015
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.13866
Subject(s) - sintering , flash (photography) , joule heating , thermal runaway , materials science , thermodynamics , activation energy , electrical resistivity and conductivity , constant (computer programming) , thermal conductivity , thermal , composite material , mineralogy , analytical chemistry (journal) , mechanics , chemistry , electrical engineering , optics , physics , power (physics) , organic chemistry , battery (electricity) , chromatography , computer science , programming language , engineering
When the sample temperature is warm enough so that the Joule heating takes over the environment's radiation heating as the dominant heating means, thermal runaway follows and flash sintering is triggered. This condition accurately predicts the reported onset temperature T on of all the constant‐field ( E ) experiments on flash sintering, performed under a constant heating rate. The predicted linear ln( E 2 / T on 4 ) versus T on −1 relation determines the activation energy and the relative ranking of the electrical conductivity of the tested materials.