Microstructure, dielectric and piezoelectric properties of (K0.5Na0.5)NbO3-Ba(Ti0.95Zr0.05)O3lead-free ceramics with CuO sintering aid

D. Lin; Kin Wing Kwok; H. L.W. Chan

doi:10.1007/s00339-007-3967-z

Microstructure, dielectric and piezoelectric properties of (K_0.5Na_0.5)NbO₃-Ba(Ti_0.95Zr_0.05)O₃lead-free ceramics with CuO sintering aid

D. Lin, Kin Wing Kwok, H. L.W. Chan

Research output: Journal article publication › Journal article › Academic research › peer-review

44 Citations (Scopus)

Abstract

Using an ordinary ceramic fabrication technique, we fabricated lead-free (1-x)(K0.5Na0.5)NbO3-xBa(Ti0.95Zr0.05)O3ceramics with CuO sintering aid . Ba(Ti0.95Zr0.05)O3diffuses into (K0.5Na0.5)NbO3to form a new solid solution. The ceramics with perovskite structure possess orthorhombic phase at x ≤ 0.04 and become tetragonal phase at ≥ 0.06. Both the paraelectric cubic-ferroelectric tetragonal and the ferroelectric tetragonal-ferroelectric orthorhombic phase transition temperatures decrease with increasing the concentration of Ba(Ti0.95Zr0.05)O3. The doping of CuO effectively promotes the densification of the ceramics. The coexistence of the orthorhombic and tetragonal phases at 0.04<x<0.06 and the improvement in sintering performances of the ceramics significantly enhance the piezoelectric and dielectric properties at room temperature. The ceramics with x=0.04-0.06 and y=0.75-1.50 possess excellent properties: d33=119-185 pC/N, kP=37-44%, kt=35-49%, ε=341-1129, cosδ=0.7-4.4% and Tc=312-346 °C.

Original language	English
Pages (from-to)	359-363
Number of pages	5
Journal	Applied Physics A: Materials Science and Processing
Volume	88
Issue number	2
DOIs	https://doi.org/10.1007/s00339-007-3967-z
Publication status	Published - 1 Aug 2007

ASJC Scopus subject areas

General Chemistry
General Materials Science

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10.1007/s00339-007-3967-z

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title = "Microstructure, dielectric and piezoelectric properties of (K0.5Na0.5)NbO3-Ba(Ti0.95Zr0.05)O3lead-free ceramics with CuO sintering aid",

abstract = "Using an ordinary ceramic fabrication technique, we fabricated lead-free (1-x)(K0.5Na0.5)NbO3-xBa(Ti0.95Zr0.05)O3ceramics with CuO sintering aid . Ba(Ti0.95Zr0.05)O3diffuses into (K0.5Na0.5)NbO3to form a new solid solution. The ceramics with perovskite structure possess orthorhombic phase at x ≤ 0.04 and become tetragonal phase at ≥ 0.06. Both the paraelectric cubic-ferroelectric tetragonal and the ferroelectric tetragonal-ferroelectric orthorhombic phase transition temperatures decrease with increasing the concentration of Ba(Ti0.95Zr0.05)O3. The doping of CuO effectively promotes the densification of the ceramics. The coexistence of the orthorhombic and tetragonal phases at 0.04<x<0.06 and the improvement in sintering performances of the ceramics significantly enhance the piezoelectric and dielectric properties at room temperature. The ceramics with x=0.04-0.06 and y=0.75-1.50 possess excellent properties: d33=119-185 pC/N, kP=37-44%, kt=35-49%, ε=341-1129, cosδ=0.7-4.4% and Tc=312-346 °C.",

author = "D. Lin and Kwok, {Kin Wing} and Chan, {H. L.W.}",

year = "2007",

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language = "English",

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Microstructure, dielectric and piezoelectric properties of (K_0.5Na_0.5)NbO₃-Ba(Ti_0.95Zr_0.05)O₃lead-free ceramics with CuO sintering aid. / Lin, D.; Kwok, Kin Wing; Chan, H. L.W.
In: Applied Physics A: Materials Science and Processing, Vol. 88, No. 2, 01.08.2007, p. 359-363.

Research output: Journal article publication › Journal article › Academic research › peer-review

TY - JOUR

T1 - Microstructure, dielectric and piezoelectric properties of (K0.5Na0.5)NbO3-Ba(Ti0.95Zr0.05)O3lead-free ceramics with CuO sintering aid

AU - Lin, D.

AU - Kwok, Kin Wing

AU - Chan, H. L.W.

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N2 - Using an ordinary ceramic fabrication technique, we fabricated lead-free (1-x)(K0.5Na0.5)NbO3-xBa(Ti0.95Zr0.05)O3ceramics with CuO sintering aid . Ba(Ti0.95Zr0.05)O3diffuses into (K0.5Na0.5)NbO3to form a new solid solution. The ceramics with perovskite structure possess orthorhombic phase at x ≤ 0.04 and become tetragonal phase at ≥ 0.06. Both the paraelectric cubic-ferroelectric tetragonal and the ferroelectric tetragonal-ferroelectric orthorhombic phase transition temperatures decrease with increasing the concentration of Ba(Ti0.95Zr0.05)O3. The doping of CuO effectively promotes the densification of the ceramics. The coexistence of the orthorhombic and tetragonal phases at 0.04<x<0.06 and the improvement in sintering performances of the ceramics significantly enhance the piezoelectric and dielectric properties at room temperature. The ceramics with x=0.04-0.06 and y=0.75-1.50 possess excellent properties: d33=119-185 pC/N, kP=37-44%, kt=35-49%, ε=341-1129, cosδ=0.7-4.4% and Tc=312-346 °C.

AB - Using an ordinary ceramic fabrication technique, we fabricated lead-free (1-x)(K0.5Na0.5)NbO3-xBa(Ti0.95Zr0.05)O3ceramics with CuO sintering aid . Ba(Ti0.95Zr0.05)O3diffuses into (K0.5Na0.5)NbO3to form a new solid solution. The ceramics with perovskite structure possess orthorhombic phase at x ≤ 0.04 and become tetragonal phase at ≥ 0.06. Both the paraelectric cubic-ferroelectric tetragonal and the ferroelectric tetragonal-ferroelectric orthorhombic phase transition temperatures decrease with increasing the concentration of Ba(Ti0.95Zr0.05)O3. The doping of CuO effectively promotes the densification of the ceramics. The coexistence of the orthorhombic and tetragonal phases at 0.04<x<0.06 and the improvement in sintering performances of the ceramics significantly enhance the piezoelectric and dielectric properties at room temperature. The ceramics with x=0.04-0.06 and y=0.75-1.50 possess excellent properties: d33=119-185 pC/N, kP=37-44%, kt=35-49%, ε=341-1129, cosδ=0.7-4.4% and Tc=312-346 °C.

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DO - 10.1007/s00339-007-3967-z

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JO - Applied Physics A: Materials Science and Processing

JF - Applied Physics A: Materials Science and Processing

IS - 2

ER -

Microstructure, dielectric and piezoelectric properties of (K_0.5Na_0.5)NbO₃-Ba(Ti_0.95Zr_0.05)O₃lead-free ceramics with CuO sintering aid

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