Effect of Na2O additions on the sinterability and piezoelectric properties of lead-free 95(Na0.5K0.5)NbO3-5LiTaO3 ceramics

被引：71

作者：

Kim, Min-Soo ^{[1
]}

Lee, Dae-Su ^{[1
]}

Park, Eon-Cheol ^{[1
]}

Jeong, Soon-Jong ^{[1
]}

Song, Jae-Sung ^{[1
]}

机构：

[1] Korea Electrotechnol Res Inst, Elect & Magnet Devices Grp, Chang Won 641120, South Korea

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2007年 / 27卷 / 13-15期

关键词：

sintering; microstructure; piezoelectric properties; niobates; tantalates;

D O I：

10.1016/j.jeurceramsoc.2007.02.194

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：

As a candidate for lead-free piezoelectric materials, Na2O excess 95(Na0.5K0.5)NbO3-5LiTaO(3) (NKN-5LT) ceramics were developed by conventional sintering process. Sintering temperature was lowered by adding Na2O as a sintering aid. Abnormal grain growth in NKN-5LT ceramics was observed with varying Na2O contents. This grain growth behavior was explained in terms of interface reaction-controlled nucleation and growth. The electrical properties of NKN-5LT ceramics were investigated as a function of Na2O concentration. In the 1 mol% Na2O excess NKN-5LT samples sintered at 1050 degrees C for 4 h in air, electromechanical coupling factor and piezoelectric constant of NKN-5LT ceramics were found to reach the highest values of 0.43 and 230 pC/N, respectively. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：4121 / 4124

页数：4

共 18 条

[1] THE GROWTH OF CRYSTALS AND THE EQUILIBRIUM STRUCTURE OF THEIR SURFACES [J].

BURTON, WK ;

CABRERA, N ;

FRANK, FC .

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1951, 243 (866) :299-358

[2] Sodium niobate ceramics prepared by mechanical activation assisted methods [J].

Castro, A ;

Jiménez, B ;

Hungría, T ;

Moure, A ;

Pardo, L .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2004, 24 (06) :941-945

[3] Sintering kinetics by structural transition at grain boundaries in barium titanate [J].

Choi, SY ;

Kang, SJL .

ACTA MATERIALIA, 2004, 52 (10) :2937-2943

[4] PIEZOELECTRIC AND DIELECTRIC PROPERTIES OF CERAMICS IN THE SYSTEM POTASSIUM SODIUM NIOBATE [J].

EGERTON, L ;

DILLON, DM .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1959, 42 (09) :438-442

[5] Dielectric and piezoelectric properties of lead-free (Na0.5K0.5)NbO3-SrTiO3 ceramics [J].

Guo, YP ;

Kakimoto, K ;

Ohsato, H .

SOLID STATE COMMUNICATIONS, 2004, 129 (05) :279-284

[6] (Na0.5K0.5)NbO3-LiTaO3 lead-free piezoelectric ceramics [J].

Guo, YP ;

Kakimoto, K ;

Ohsato, H .

MATERIALS LETTERS, 2005, 59 (2-3) :241-244

[7] PROPERTIES OF HOT-PRESSED FERROELECTRIC ALKALI NIOBATE CERAMICS [J].

HAERTLING, GH .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1967, 50 (06) :329-+

[8] HOT PRESSING OF POTASSIUM-SODIUM NIOBATES [J].

JAEGER, RE ;

EGERTON, L .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1962, 45 (05) :209-213

[9] PIEZOELECTRIC PROPERTIES OF LEAD ZIRCONATE-LEAD TITANATE SOLID-SOLUTION CERAMICS [J].

JAFFE, B ;

ROTH, RS ;

MARZULLO, S .

JOURNAL OF APPLIED PHYSICS, 1954, 25 (06) :809-810

[10]

Jaffe B., 1971, PIEZOELECTRIC CERAMI, P135

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