Preparation of core/shell structured NiO-based ceramics and their dielectric properties

被引：10

作者：

Lin, YH ^{[1
]}

Jiang, L ^{[1
]}

Zhao, RJ ^{[1
]}

Liu, G ^{[1
]}

Nan, CW ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2005年 / 38卷 / 10期

关键词：

D O I：

10.1088/0022-3727/38/10/017

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-permittivity dielectric core/shell structured Li-0.01 SixNi0.99-xO ceramics (abbreviated as LSNO) have been successfully prepared. Analyses of the ceramic microstructure and composition indicate that the dopants of SiO2 are mainly dispersed into the grain boundaries and exist as the insulating Ni2SiO4 phase. All the LSNO ceramic samples exhibit high permittivity, and the permittivity reaches about 1.2 x 10(4) for the LSNO-1 sample. The concentration of Si has a remarkable effect on the dielectric properties of the LSNO ceramics. The origin of the high permittivity observed in these LSNO ceramics is attributed to the Maxwell-Wagner polarization mechanism and a thermally activated mechanism.

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页码：1615 / 1620

页数：6

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共 27 条

[1] Electrical and optical properties of narrow-band materials [J].

Adler, David ;

Feinleib, Julius .

PHYSICAL REVIEW B-SOLID STATE, 1970, 2 (08) :3112-3134

[2] Dielectric properties of nanostructured nickel oxide [J].

Biju, V ;

Khadar, MA .

JOURNAL OF MATERIALS SCIENCE, 2003, 38 (19) :4055-4063

[3] DC conductivity of consolidated nanoparticles of NiO [J].

Biju, V ;

Khadar, MA .

MATERIALS RESEARCH BULLETIN, 2001, 36 (1-2) :21-33

[4] Separation of grain boundary effects and intrinsic properties in perovskite-like Gd0.6Y0.4BaCo2O5.5 using high-frequency dielectric spectroscopy -: art. no. 184403 [J].

Bobnar, V ;

Lunkenheimer, P ;

Paraskevopoulos, M ;

Loidl, A .

PHYSICAL REVIEW B, 2002, 65 (18) :1-5

[5] SMALL-POLARON VERSUS BAND CONDUCTION IN SOME TRANSITION-METAL OXIDES [J].

BOSMAN, AJ ;

VANDAAL, HJ .

ADVANCES IN PHYSICS, 1970, 19 (77) :1-&

[6] MECHANISM OF ELECTRICAL CONDUCTION IN LI-DOPED NIO [J].

BOSMAN, AJ ;

CREVECOEUR, C .

PHYSICAL REVIEW, 1966, 144 (02) :763-+

[7] Extrinsic models for the dielectric response of CaCu3Ti4O12 [J].

Cohen, MH ;

Neaton, JB ;

He, LX ;

Vanderbilt, D .

JOURNAL OF APPLIED PHYSICS, 2003, 94 (05) :3299-3306

[8] Ferroelectric ceramics: History and technology [J].

Haertling, GH .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1999, 82 (04) :797-818

[9] First-principles study of the structure and lattice dielectric response of CaCu3Ti4O12 -: art. no. 214112 [J].

He, LX ;

Neaton, JB ;

Cohen, MH ;

Vanderbilt, D ;

Homes, CC .

PHYSICAL REVIEW B, 2002, 65 (21) :2141121-21411211

[10] Optical response of high-dielectric-constant perovskite-related oxide [J].

Homes, CC ;

Vogt, T ;

Shapiro, SM ;

Wakimoto, S ;

Ramirez, AP .

SCIENCE, 2001, 293 (5530) :673-676