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Temperature Profile of Anatase‐TiO 2 Powder Compact during Microwave Heating
Author(s) -
Ikuma Yasuro,
Shigemura Takashi,
Hirose Takashi
Publication year - 1996
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.1151-2916.1996.tb09012.x
Subject(s) - pellets , rutile , pellet , materials science , anatase , microwave , analytical chemistry (journal) , mineralogy , composite material , chemical engineering , chemistry , chromatography , biochemistry , photocatalysis , quantum mechanics , catalysis , physics , engineering
Anatase‐TiO 2 cylindrical pellets were microwave sintered and partially transformed to rutile‐TiO 2 .The rutile concentration profile was determined as a function of location within the pellet. The rutile distribution in the microwavesintered pellets was different from that in pellets sintered by conventional fast firing. Temperature profiles within the pellets were estimated using the irreversible nature of the anatase‐rutile transformation. The estimated temperature profile within each pellet was not uniform. In the axial direction, maximum temperature occurred in the middle of the pellet. In the radial direction, maximum temperature occurred at 1 mm below the surface of the cylinder wall. Analysis of the temperature profile indicated that, although heat flow occurred in the microwave‐sintered pellet, the temperature profile did not change during a microwave exposure of 5–90 min.