Solvothermal synthesis of nanocrystalline KTaO3: Effect of solvent dielectric constant

被引：19

作者：

Makarova, M. ^{[1
]}

Bykov, P. ^{[1
]}

Drahokoupil, J. ^{[1
]}

Cernansky, M. ^{[1
]}

Dlabacek, Z. ^{[1
]}

Dejneka, A. ^{[1
]}

Jastrabik, L. ^{[3
]}

Trepakova, V. ^{[1
,2
]}

机构：

[1] AS CR, Inst Phys, Vvi, Prague 18221 8, Czech Republic

[2] RAS, Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[3] Palacky Univ, RCPTM, Joint Lab Opt, Olomouc 77146, Czech Republic

来源：

MATERIALS RESEARCH BULLETIN | 2012年 / 47卷 / 07期

关键词：

Nanostructures; Chemical synthesis; Raman spectroscopy; X-ray diffraction; Microstructure; POTASSIUM TANTALATE; HYDROTHERMAL SYNTHESIS; POWDERS; PEROVSKITE; GROWTH; SRTIO3;

D O I：

10.1016/j.materresbull.2012.03.028

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A set of KTaO3 nanopowders has been prepared at T = 180 degrees C using various aliphatic alcohols and water as solvents. Pronounced connection between the solvent type and potassium tantalate structures was found. Structural X-ray, TEM and Raman scattering experiments have shown that the solvent dielectric constant epsilon is an important critical parameter. At E 24 the cubic perovskite-type phase was formed. Mixed perovskite and pyrochlore phases were formed at larger values of epsilon. Only pure pyrochlore phase is realized when epsilon similar to 80. Pyrochlore-free perovskite-structure nanopowder phase formation with the particle size of similar to 18 and 28 nm was achieved when ethanol and isopropanol solvents were used. Under annealing the coherent domain size decreased down to 6 and 18 nm respectively, since the amorphous phase crystallized. Crystallinity of both as-prepared and annealed powder is the best when isopropanol solvent is used. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：1768 / 1773

页数：6

共 28 条

[1]

Eliseev E.A., ARXIV10122400

[2] ELECTRIC-FIELD-INDUCED RAMAN SCATTERING IN SRTIO3 AND KTAO3 [J].

FLEURY, PA ;

WORLOCK, JM .

PHYSICAL REVIEW, 1968, 174 (02) :613-&

[3] A quick and green approach to prepare [Rmim]OH and its application in hydrophilic ionic liquid synthesis [J].

Gao, Jian ;

Liu, Jianguo ;

Li, Bo ;

Liu, Wenming ;

Xie, Yun ;

Xin, Yuchen ;

Yin, Ying ;

Jie, Xiao ;

Gu, Jun ;

Zou, Zhigang .

NEW JOURNAL OF CHEMISTRY, 2011, 35 (08) :1661-1666

[4]

Gevorgian S., 2009, Ferroelectric in Microwave Devices, Circuits and Systems Physics, Modelling, Fabrication and Measurements

[5]

Glinsek S, 2010, J AM CERAM SOC, V1-6, P209

[6] Hydrothermal synthesis of perovskite and pyrochlore powders of potassium tantalate [J].

Goh, GKL ;

Haile, SM ;

Levi, CG ;

Lange, FF .

JOURNAL OF MATERIALS RESEARCH, 2002, 17 (12) :3168-3176

[7]

Golovina I.S., ARXIV10122295

[8] Mixed solvents:: a key in solvothermal synthesis of KTaO3 [J].

He, Y ;

Zhu, YF ;

Wu, NZ .

JOURNAL OF SOLID STATE CHEMISTRY, 2004, 177 (09) :2985-2990

[9] Solvothermal synthesis of sodium and potassium tantalate perovskite nanocubes [J].

He, Y ;

Zhu, YF .

CHEMISTRY LETTERS, 2004, 33 (07) :900-901

[10] PREPARATION OF POTASSIUM TANTALATE NIOBATE BY SOL-GEL METHOD [J].

HIRANO, S ;

YOGO, T ;

KIKUTA, K ;

MORISHITA, T ;

ITO, Y .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1992, 75 (06) :1701-1704

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