Structure sequence in the CaTiO3-LaAlO3 microwave ceramics -: Revised

被引：39

作者：

Khalyavin, DD ^{[1
]}

Salak, AN

Senos, AMR

Mantas, PQ

Ferreira, VM

机构：

[1] Univ Aveiro, CICECO, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal

[2] Univ Aveiro, CICECO, Dept Civil Engn, P-3810193 Aveiro, Portugal

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2006年 / 89卷 / 05期

关键词：

D O I：

10.1111/j.1551-2916.2006.00929.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The composition-induced crystal structure transformations in the (1-x)CaTiO3-xLaAlO(3) microwave ceramics were studied by X-ray powder diffraction. Increasing LaAlO3 content results in two-phase transitions: Pnma -> Imma (0.4 < x < 0.5) and Imma -> R (3) over barc (0.5 < x < 0.6), which are related to changes of the octahedral tilting: a(-)b(+)a(-)-> a(-)b(0)a(-) and a(-)b(0)a(-)-> a(-)a(-)a(-), respectively. The compositional variation of the parameters of the primitive perovskite unit cell is consistent with a continuous character of the Pnma -> Imma phase transition. In the case of the Imma -> R (3) over barc crossover, a discontinuity in the variation is observed.

引用

页码：1721 / 1723

页数：3

共 12 条

[1] Dielectric materials for applications in microwave communications [J].

Cava, RJ .

JOURNAL OF MATERIALS CHEMISTRY, 2001, 11 (01) :54-62

[2] CLASSIFICATION OF TILTED OCTAHEDRA IN PEROVSKITES [J].

GLAZER, AM .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1972, B 28 (NOV15) :3384-&

[3] SIMPLE WAYS OF DETERMINING PEROVSKITE STRUCTURES [J].

GLAZER, AM .

ACTA CRYSTALLOGRAPHICA SECTION A, 1975, 31 (NOV1) :756-762

[4] Transformation processes in LaAlO3:: Neutron diffraction, dielectric, thermal, optical, and Raman studies -: art. no. 054110 [J].

Hayward, SA ;

Morrison, FD ;

Redfern, SAT ;

Salje, EKH ;

Scott, JF ;

Knight, KS ;

Tarantino, S ;

Glazer, AM ;

Shuvaeva, V ;

Daniel, P ;

Zhang, M ;

Carpenter, MA .

PHYSICAL REVIEW B, 2005, 72 (05)

[5] Group-theoretical analysis of octahedral tilting in perovskites [J].

Howard, CJ ;

Stokes, HT .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1998, 54 :782-789

[6] Characterization of CaTiO3-NdAlO3 dielectric ceramics [J].

Jancar, B ;

Suvorov, D ;

Valant, M ;

Drazic, G .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2003, 23 (09) :1391-1400

[7] Microwave dielectric properties and microstructural characteristics of aliovalently doped perovskite ceramics based on CaTiO3 [J].

Jancar, B ;

Suvorov, D ;

Valant, M .

EURO CERAMICS VII, PT 1-3, 2002, 206-2 :1289-1292

[8] Sintering behavior and microwave dielectric properties of (Ca, La)(Ti, Al)O3 ceramics [J].

Moon, JH ;

Jang, HM ;

Park, HS ;

Shin, JY ;

Kim, HS .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1999, 38 (12A) :6821-6826

[9] On the temperature coefficient of resonant frequency in microwave dielectrics [J].

Reaney, IM ;

Wise, P ;

Ubic, R ;

Breeze, J ;

Alford, NM ;

Iddles, D ;

Cannell, D ;

Price, T .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 2001, 81 (02) :501-510

[10] RECENT ADVANCES IN MAGNETIC-STRUCTURE DETERMINATION BY NEUTRON POWDER DIFFRACTION [J].

RODRIGUEZCARVAJAL, J .

PHYSICA B, 1993, 192 (1-2) :55-69

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