Simulating Microstructural Evolution and Electrical Transport in Ceramic Gas Sensors

Simulating Microstructural Evolution and Electrical Transport in Ceramic Gas Sensors

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‐dimens...

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Bibliographic Details
Published in:Journal of the American Ceramic Society Vol. 83; no. 9; pp. 2219 - 2226
Main Authors: Wang, Yunzhi, Liu, Yuhui, Ciobanu, Cristian, Patton, Bruce R.
Format: Journal Article
Language:English
Published: Westerville, Ohio American Ceramics Society 01-09-2000
Blackwell
Wiley Subscription Services, Inc
Subjects:
Analytical chemistry
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Chemistry
electroceramics
Electrotechnical and electronic ceramics
Exact sciences and technology
General, instrumentation
microstructure
sensors
Technical ceramics
Electrical conductivity
Electrical properties
Sintering
Manufacturing
Chemical sensor
Microstructure
Modeling
Gas detector
Electroceramics
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Summary: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.
Bibliography:ark:/67375/WNG-PC2GS408-C
ArticleID:JACE2219
istex:D9E517DF225761BC5AF1B8A4C28192BD890B4A0C
L.‐Q. Chen—contributing editor
Member, American Ceramic Society.
Authors YW and YL were supported by National Science Foundation, under Grant No. DMR 9703044. Authors CC and BRP were supported by the National Science Foundation Center for Industrial Sensors and Measurements, through Grant No. EEC–9523358.
Based in part on the thesis submitted by author YL for the M.S. Degree in Materials Science and Engineering at The Ohio State University.
Presented at the 100th Annual Meeting of the American Ceramic Society, Cincinnati, OH, May 4–6, 1998 (The Computational Modeling of Materials and Processing Symposium, Paper No. SV–032–98).
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.2000.tb01538.x