TiO2 as a sintering additive for KNbO3 ceramics

被引：13

作者：

Makovec, Darko ^{[1
]}

Pribosic, Irena ^{[1
]}

Drofenik, Miha ^{[1
]}

机构：

[1] Jozef Stefan Inst, SL-1000 Ljubljana, Slovenia

来源：

CERAMICS INTERNATIONAL | 2008年 / 34卷 / 01期

关键词：

sintering; niobates; TiO2; KNbO3;

D O I：

10.1016/j.ceramint.2006.08.008

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：

Improved densification during the conventional sintering of KNbO3 ceramics was achieved by using small additions of TiO2. This improved densification can be explained on the basis of high-temperature chemical reactions in the system. X-ray diffractometry and electron microscopy were used in combination with diffusion-couple experiments in order to elucidate the chemical reactions between KNbO3 and TiO2. TiO2 reacts with KNbO3 forming KNbTiO5, and a low concentration of Ti incorporates in the KNbO3 structure resulting in the formation of oxygen vacancies and, consequently, in an improvement in the densification. At similar to 1037 degrees C eutectic melting between the KNbO3 and the KNbTiO5 further improves the densification of the KNbO3 ceramics. (C) 2006 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：89 / 94

页数：6

共 17 条

[1] AHN ZS, 1987, J AM CERAM SOC, V70, pC18
[2] CRITICAL-EVALUATION AND OPTIMIZATION OF THE THERMODYNAMIC PROPERTIES AND PHASE-DIAGRAMS OF THE MNO-TIO2, MGO-TIO2, FEO-TIO2, TI2O3-TIO2, NA2O-TIO2, AND K2O-TIO2 SYSTEMS
ERIKSSON, G
PELTON, AD
[J]. METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY, 1993, 24 (05): : 795 - 805
[3] Dielectric and piezoelectric properties of lead-free (Na0.5K0.5)NbO3-SrTiO3 ceramics
Guo, YP
Kakimoto, K
Ohsato, H
[J]. SOLID STATE COMMUNICATIONS, 2004, 129 (05) : 279 - 284
[4] Structure and electrical properties of lead-free (Na0.5K0.5)Nbo3-BaTiO3 ceramics
Guo, YP
Kakimoto, K
Ohsato, H
[J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 2004, 43 (9B): : 6662 - 6666
[5] THE PHASE-DIAGRAMS OF NA2O AND K2O WITH NB2O5 AND THE TERNARY-SYSTEM NB2O5-NA2O-YB2O3
IRLE, E
BLACHNIK, R
GATHER, B
[J]. THERMOCHIMICA ACTA, 1991, 179 : 157 - 169
[6] Ferroelectric and piezoelectric properties of kNbO3 ceramics containing small amounts of LaFeO3
Kakimoto, K
Masuda, I
Ohsato, H
[J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 2003, 42 (9B): : 6102 - 6105
[7] ACTIVATED SINTERING AND ELECTRICAL PROPERTIES OF NAKNBO3
KOSEC, M
KOLAR, D
[J]. MATERIALS RESEARCH BULLETIN, 1975, 10 (05) : 335 - 339
[8] INFLUENCE OF ND2O3 DOPING ON THE REACTION PROCESS AND SINTERING BEHAVIOR OF BACEO3 CERAMICS
LU, CH
DEJONGHE, LC
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1994, 77 (10) : 2523 - 2528
[9] Positive temperature coefficient of resistivity effect in Pb-doped KNbO3
Pribosic, I
Makovec, D
Drofenik, M
[J]. JOURNAL OF MATERIALS RESEARCH, 2002, 17 (12) : 2989 - 2992
[10] PRIBOSIC I, P 7 C ECERS 2001, P1401

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