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Simulating Microstructural Evolution and Electrical Transport in Ceramic Gas Sensors
Author(s) -
Wang Yunzhi,
Liu Yuhui,
Ciobanu Cristian,
Patton Bruce R.
Publication year - 2000
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/j.1151-2916.2000.tb01538.x
Subject(s) - materials science , sintering , microstructure , ceramic , electrical resistivity and conductivity , porosity , resistor , grain size , lattice (music) , composite material , electrical engineering , physics , voltage , acoustics , engineering
An integrated computational approach to microstructural evolution and electrical transport in ceramic gas sensors has been proposed. First, the particle‐flow model and the continuum‐phase‐field method are used to describe the microstructural development during the sintering of a prototype two‐dimensional film. Then, the conductivity of the sintering samples is calculated concurrently as the microstructure evolves, using both resistor lattice models and effective medium theory for electrical transport in porous aggregates of lightly sintered particles. This approach, when combined with the modeling of resistivity at the grain–grain contacts as a function of neck geometry, ambient gas concentration and temperature, could facilitate the development and optimization of novel microstructures for advanced ceramic gas sensors.