Effects of heating schedule and atmosphere on the phase formation of plzt thin films prepared using sol-gel process
作者:
DaeSung Yoon,
JaeMyung Kim,
KiCheol Ahn,
Kwangsoo No,
期刊:
Integrated Ferroelectrics
(Taylor Available online 1994)
卷期:
Volume 4,
issue 1
页码: 93-101
ISSN:1058-4587
年代: 1994
DOI:10.1080/10584589408018663
出版商: Taylor & Francis Group
关键词: PLZT;heating schedule;perovskite;pyrochlore
数据来源: Taylor
摘要:
Lead lanthanum zirconate titanate [PLZT(91/651/35)] thin films were fabricated by spin coating of the metallo-organic solutions onto ITO-coated Corning 7059 glass substrates and heat treated at 600[ddot]C for 2 hours with different heating schedules. Microstructure and perovskite phase content of the PLZT thin films were studied using X-ray diffraction analysis (XRD), optical microscope (OM) and scanning electron microscope (SEM). A typical microstructure of the PLZT(91/651/35) thin films prepared using sol-gel process consists of micrometer-scale (about 4–5 μm) circular perovskite grains surrounded nanometer-scale pyrochlore grains. Effects of heating schedule and atmosphere on the crystallization kinetics of the amorphous PLZT thin films were studied. Firing at higher heating rate increased the number of perovskite nuclei and decreased pyrochlore content in the films. Also, the film heat treated at higher heating rate had lower transmittance at visible light because the interface boundary and the grain boundary increased and acted as the light scattering source. The films heat treated in air and O2atmosphere have relatively higher perovskite phase content than the film heat treated in Pb atmosphere.
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