New high permittivity tetragonal tungsten bronze dielectrics Ba2LaMNb4O15: M=Mn, Fe

被引：16

作者：

McCabe, Emma E. ^{[1
]}

West, Anthony R. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2010年 / 183卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

Dielectrics; Electrical properties; Tetragonal tungsten bronze; PHASES;

D O I：

10.1016/j.jssc.2009.11.032

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The new phases Ba2LaMNb4O15 M=Mn, Fe were prepared by solid state reaction at 1100 degrees C They have the tetragonal tungsten bronze structure, space group P4/mbm, at room temperature. The two octahedral sites show partial order of M and Nb with preferential occupancy of the smaller B(1) sites by M. Both phases have high permittivities 90 +/- 15 over the range 10-320 K Ba2LaFeNb4O15 is highly insulating with bulk conductivity < 10(-8) ohm(-1) cm(-1) at 25 degrees C and tan delta << 0 001 over the range 100-320 K and at 10(5) Hz. Solid solutions between these new phases and the compositionally and structurally related relaxor ferroelectric Ba2LaTi2Nb3O15 show gradual loss of ferroelectric behaviour attributed to replacement of polarisable Ti4+ by a mixture of (Mn, Fe)(3). and Nb5+. (C) 2010 Published by Elsevier Inc.

引用

页码：624 / 630

页数：7

共 16 条

[1] Relaxor-like behavior of lead-free Sr2LaTi2Nb3O15 ceramics with tetragonal tungsten bronze structure [J].

Bovtun, V. ;

Kamba, S. ;

Veljko, S. ;

Nuzhnyy, D. ;

Knizek, K. ;

Savinov, M. ;

Petzelt, J. .

JOURNAL OF APPLIED PHYSICS, 2007, 101 (05)

[2] In-situ formation of barium ferrite in iron-doped "tetragonal tungsten bronze'': Elaboration of room temperature multiferroic composites [J].

Castel, E. ;

Josse, M. ;

Roulland, F. ;

Michau, D. ;

Raison, L. ;

Maglione, M. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2009, 321 (11) :1773-1777

[3] Structural singularities in ferroelectric Sr2NaNb5O15 [J].

Garcia-Gonzalez, E. ;

Torres-Pardo, A. ;

Jimenez, R. ;

Gonzalez-Calbet, J. M. .

CHEMISTRY OF MATERIALS, 2007, 19 (14) :3575-3580

[4] A new relaxor ferroelectric, Ba2LaTi2Nb3O15 [J].

Kirk, CA ;

Stennett, MC ;

Reaney, IM ;

West, AR .

JOURNAL OF MATERIALS CHEMISTRY, 2002, 12 (09) :2609-2611

[5]

Larson A. C., 2004, GEN STRUCTURE ANAL S

[6] Coupling between octahedral tilting and ferroelectric order in tetragonal tungsten bronze-structured dielectrics [J].

Levin, Igor ;

Stennett, Martin C. ;

Miles, Gabrielle C. ;

Woodward, David. I. ;

West, Anthony R. ;

Reaney, Ian M. .

APPLIED PHYSICS LETTERS, 2006, 89 (12)

[7] X-ray diffraction data for the new ferroelectric tetragonal tungsten bronze phases, Ba2RETi2M3O15:: M=Nb and RE=La, Pr, Nd, Sm, Gd, Dy, (Bi); M=Ta and RE=La, Nd [J].

Miles, GC ;

Stennett, MC ;

Pickthall, D ;

Kirk, CA ;

Reaney, IM ;

West, AR .

POWDER DIFFRACTION, 2005, 20 (01) :43-46

[8] Temperature-dependent crystal structure of ferroelectric Ba2LaTi2Nb3O15 [J].

Miles, GC ;

Stennett, MC ;

Reaney, IM ;

West, AR .

JOURNAL OF MATERIALS CHEMISTRY, 2005, 15 (07) :798-802

[9]

Moulson A.J., 1990, Electroceramics Materials, Properties, Applications, V1st

[10] Phase transition hysteresis and anomalous Curie-Weiss behavior of ferroelectric tetragonal tungsten bronzes Ba2RETi2Nb3O15:RE=Nd,Sm [J].

Prades, Marta ;

Beltran, Hector ;

Maso, Nahum ;

Cordoncillo, Eloisa ;

West, Anthony R. .

JOURNAL OF APPLIED PHYSICS, 2008, 104 (10)

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