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Polar‐Oriented Crystallization of Fresnoite (Ba 2 TiSi 2 O 8 ) on Glass Surface Due to Ultrasonic Treatment with Suspensions
Author(s) -
Ding Yong,
Miura Yoshinari,
Osaka Akiyoshi
Publication year - 1994
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.1151-2916.1994.tb04522.x
Subject(s) - crystallization , materials science , ultrasonic sensor , suspension (topology) , polar , chemical engineering , mineralogy , chemistry , physics , mathematics , astronomy , homotopy , acoustics , pure mathematics , engineering
Improved polar ( c ‐axis) oriented growth of fresnoite (Ba 2 TiSi 2 O 8 ) was observed for surface crystallization of a glass 33.3BaO· 16.7TiO 2 · 50SiO 2 (in mol%) due to ultrasonic surface treatment with an aqueous suspension of Ba 2 TiSi 2 O 8 , and an oriented film more than 50 μm in thickness was prepared. The effect of ultrasonic treatment on the polar orientation depends on the suspending particles; of these, foreign particles of a phase other than the crystallizing Ba 2 TiSi 2 O 8 give poorer efficiency than the Ba 2 TiSi 2 O 8 particles. It is assumed that fresnoite has a tendency toward preferred polar growth on the glass, and seeding of a large number of fine particles through ultrasonic bombardment realizes the tendency. The polar‐oriented growth kinetics of Ba 2 TiSi 2 O 8 were also discussed.