Study of the compensation mechanism of La2O3-doped BaTiO3

被引：3
作者：
Ramajo, M [1 ]
Brzozowski, E [1 ]
Castro, MS [1 ]
机构：
[1] Univ Nacl Mar del Plata, CONICET, INTEMA, Inst Invest Ciencia & Tecnol Mat, RA-7608 Mar Del Plata, Buenos Aires, Argentina
来源：
BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO | 2004年 / 43卷 / 03期
关键词：
BaTiO3; electrical properties; ionic defects; dopants; microstructure;
D O I：
10.3989/cyv.2004.v43.i3.477
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：
In this work, the incorporation of several concentrations of the La3+ ion into the BaTiO3 lattice was studied. It was verified that low La3+ concentrations inhibits the grain growth and produces a highly densified material. However, a delay in the sintering behavior in ceramics with high doping concentrations was observed. The La3+ donor incorporation in the BaTiO3 modified the defects structure, favored titanium vacancies formation, and stabilized a pseudocubic phase. This effect influences the dielectric properties and the cubic-tetragonal transition temperature.
引用
收藏
页码：691 / 694
页数：4
相关论文
共 18 条
  • [1] Conduction mechanism of barium titanate ceramics
    Brzozowski, E
    Castro, MS
    [J]. CERAMICS INTERNATIONAL, 2000, 26 (03) : 265 - 269
  • [2] Influence of foreign ions on the crystal structure of BaTiO3
    Buscaglia, MT
    Buscaglia, V
    Viviani, M
    Nanni, P
    Hanuskova, M
    [J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2000, 20 (12) : 1997 - 2007
  • [3] Atomistic simulation of dopant incorporation in barium titanate
    Buscaglia, Maria Teresa
    Buscaglia, Vincenzo
    Viviani, Massimo
    Nanni, Paolo
    [J]. 2001, American Ceramic Soc, Westerville (84)
  • [4] COMPENSATING DEFECTS IN HIGHLY DONOR-DOPED BATIO3
    CHAN, HM
    HARMER, MP
    SMYTH, DM
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1986, 69 (06) : 507 - 510
  • [5] CHAN NH, 1984, J AM CERAM SOC, V67, P285, DOI 10.1111/j.1151-2916.1984.tb18849.x
  • [6] Sintering characteristics in the BaTiO3-Nb2O5-Co3O4 ternary system:: II, stability of so-called "core-shell" structure
    Chazono, H
    Kishi, H
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2000, 83 (01) : 101 - 106
  • [7] THE INFLUENCE OF FIRING PROFILE AND ADDITIVES ON THE PTCR EFFECT AND MICROSTRUCTURE OF BATIO3 CERAMICS
    CHIOU, BS
    KOH, CM
    DUH, JG
    [J]. JOURNAL OF MATERIALS SCIENCE, 1987, 22 (11) : 3893 - 3900
  • [8] Cullity BD, 1978, ELEMENTS XRAY DIFFRA
  • [9] Desu S. B., 1992, Key Engineering Materials, V66-67, P375
  • [10] EFFECTS OF PORE MORPHOLOGY AND GRAIN-SIZE ON THE DIELECTRIC-PROPERTIES AND TETRAGONAL CUBIC PHASE-TRANSITION OF HIGH-PURITY BARIUM-TITANATE
    FANG, TT
    HSIEH, HL
    SHIAU, FS
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1993, 76 (05) : 1205 - 1211
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