The preparation of a novel layered lead titanate and its conversion to the perovskite lead titanate PbTiO3

被引：4
作者：
Blake, GR
Armstrong, AR
Sastre, E
Zhou, W
Wright, PA
机构：
[1] Univ St Andrews, Sch Chem, Haugh KY16 9ST, Fife, Scotland
[2] CSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, Spain
来源：
MATERIALS RESEARCH BULLETIN | 2001年 / 36卷 / 10期
关键词：
layered compound; hydrothermal synthesis; X-ray and neutron diffraction;
D O I：
10.1016/S0025-5408(01)00663-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel layered lead titanate with the approximate composition PbTiO2(CO3)(0.3) (NO3)(0.35)(OH) has been synthesized hydrothermally under acidic conditions. The structure has been solved and refined from X-ray and neutron powder diffraction data in the space group P -3 1 m, with cell dimensions a = 5.1787(5) Angstrom and c = 8.5222(7) Angstrom. The titanate layers possess a gibbsite-like structure: lead cations and oxyanions such as carbonate and nitrate are included between the layers. Upon heating the solid loses water, carbon dioxide and nitrogen dioxide and converts via a poorly crystalline intermediate phase to the perovskite PbTiO3. The conversion is complete by 550 degreesC; continued heating results in an increase in crystallinity. (C) 2001 Elsevier Science Ltd. All rights reserved.
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页码：1837 / 1845
页数：9
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