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Crystallization Kinetics and Phase Development of PbO–BaO–SrO–Nb 2 O 5 –B 2 O 3 –SiO 2 ‐Based Glass–Ceramics
Author(s) -
Cheng ChingTai,
Lanagan Michael,
Jones Beth,
Lin JiangTsair,
Pan MingJen
Publication year - 2005
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.1551-2916.2005.00551.x
Subject(s) - activation energy , crystallization , nucleation , materials science , tetragonal crystal system , analytical chemistry (journal) , differential thermal analysis , mineralogy , barium , kinetics , phase (matter) , tungsten , strontium barium niobate , crystallography , chemistry , crystal structure , dielectric , diffraction , metallurgy , physics , organic chemistry , chromatography , quantum mechanics , optics , optoelectronics , ferroelectricity
The nucleation and crystallization kinetics of PbO–BaO–SrO–Nb 2 O 5 –B 2 O 3 –SiO 2 ‐based glass–ceramics have been investigated. Strontium barium niobate (Sr 0.33 Ba 0.67 Nb 2 O 6 ) with a tetragonal tungsten–bronze structure formed as the major crystalline phase, which nucleates and grows on the surface region of samples. The results of the present study showed an apparent activation energy of 193 kJ/mol for nucleation, which was controlled by the viscous flow of the glass. Quantitative X‐ray analysis and differential thermal analysis showed that the rate‐limiting mechanism of crystallization appeared to be a three‐dimensional interfacial growth, which has an apparent activation energy of 386–430 kJ/mol, a value that is close to the dissociation of Si–O bonds in the glass system.