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Correlation between Surface‐Crystallized ZnO and the Amount of Al 2 O 3 in B orate‐Based Glass‐Ceramics
Author(s) -
Masai Hirokazu,
Ueno Takahiro,
Takahashi Yoshihiro,
Fujiwara Takumi
Publication year - 2011
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.1551-2916.2011.04604.x
Subject(s) - crystallization , nucleation , materials science , crystallite , precipitation , boron , chemical engineering , ceramic , crystal growth , crystal (programming language) , mineralogy , composite material , metallurgy , crystallography , chemistry , programming language , physics , organic chemistry , meteorology , computer science , engineering
The correlation between the Al 2 O 3 content and the crystallization behavior of the oxide semiconductor ZnO in 5CaO–25B 2 O 3 –45ZnO– x Al 2 O 3 –10K 2 O–15SiO 2 ( CaBZAKS x ) glass‐ceramics was investigated, with a particular focus on the c ‐oriented crystallization behavior of ZnO . C ‐oriented precipitation of ZnO crystallites in glass‐ceramics is brought about by the in‐plane crystal growth of ZnO along the a ‐axis. Addition of Al 2 O 3 promotes the formation of ZnO 4 rather than ZnO 6 in the mother glass, and the ZnO 4 unit affects the nucleation and selective crystallization of ZnO that also takes the four‐coordination state of Zn . The present results suggest that crystallization of ZnO from multi‐component glass is also dominated by the local coordination state of the mother glass.