Microstructure and Electrical Properties of Lead-Free (Na&lt;sub&gt;0.5&lt;/sub&gt;K&lt;sub&gt;0.5&lt;/sub&gt;)NbO&lt;sub&gt;3&lt;/sub&gt; - Bi&lt;sub&gt;0.5&lt;/sub&gt;(Na&lt;sub&gt;0.97&lt;/sub&gt;K&lt;sub&gt;0.03&lt;/sub&gt;)&lt;sub&gt;0.5&lt;/sub&gt;TiO&lt;sub&gt;3&lt;/sub&gt; Ceramics

Chun Huy Wang; Ming Qiu Wei

doi:10.4028/www.scientific.net/amm.368-370.760

ScienceGate Book Chapters

JOURNAL ARTICLE

Microstructure and Electrical Properties of Lead-Free (Na0.5K0.5)NbO3 - Bi0.5(Na0.97K0.03)0.5TiO3 Ceramics

Chun Huy Wang Ming Qiu Wei

Year: 2013 Journal: Applied Mechanics and Materials Vol: 368-370 Pages: 760-763 Publisher: Trans Tech Publications

DOI: 10.4028/www.scientific.net/amm.368-370.760

Get Full-Text PDF Get Analytical Report

Abstract

(Na0.5K0.5)NbO3 with Bi0.5(Na0.97K0.03)0.5TiO3 with x≤0.05 has been prepared by the conventional mixed oxide process. X-ray diffraction analysis revealed that, during sintering, all the Bi(Na0.97K0.03)TiO3 diffuses into the lattice of (Na0.5K0.5)NbO3 to form a solid solution with a perovskite structure. A morphotropic phase boundary (MPB) between orthorhombic (O) and rhombohedral (R) was found at the composition 0.98(Na0.5K0.5)NbO3-0.02Bi0.5(Na0.97K0.03)0.5TiO3 [abbreviated as 0.98NKN-0.02BNKT] with correspondingly enhanced dielectric and piezoelectric properties. For 0.98NKN-0.02BNKT ceramics, the electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.33 and 0.49, respectively, after sintering at 1100 oC for 3 h. The ratio of the thickness coupling coefficient to the planar coupling coefficient is 1.48. With suitable Bi0.5(Na0.97K0.03)0.5TiO3 concentration, a dense microstructure and good electrical properties are obtained.

Keywords:

Materials science Microstructure Electromechanical coupling coefficient Sintering Orthorhombic crystal system Phase boundary Dielectric Analytical Chemistry (journal) Perovskite (structure) Natural bond orbital Piezoelectricity Ceramic Solid solution Mixed oxide Phase (matter) Mineralogy Crystal structure Crystallography Composite material Oxide Metallurgy Chemistry Optoelectronics

Metrics

Cited By

0.00

FWCI (Field Weighted Citation Impact)

Refs

0.14

Citation Normalized Percentile

Is in top 1%

Is in top 10%

Topics

Ferroelectric and Piezoelectric Materials

Physical Sciences → Materials Science → Materials Chemistry

Microwave Dielectric Ceramics Synthesis

Physical Sciences → Engineering → Electrical and Electronic Engineering

Multiferroics and related materials

Physical Sciences → Materials Science → Electronic, Optical and Magnetic Materials

Microstructure and Electrical Properties of Lead-Free (Na<sub>0.5</sub>K<sub>0.5</sub>)NbO<sub>3</sub> - Bi<sub>0.5</sub>(Na<sub>0.97</sub>K<sub>0.03</sub>)<sub>0.5</sub>TiO<sub>3</sub> Ceramics

Abstract

Metrics

Topics

Related Documents

Piezoelectric and Electrical Properties of Lead-Free (Na<sub>0.5</sub>K<sub>0.5</sub>)NbO<sub>3</sub>- Bi<sub>0.5</sub>(Na<sub>0.80</sub>K<sub>0.20</sub>)<sub>0.5</sub>TiO<sub>3</sub> Ceramics

Electrical and Physical Properties of Lead-Free (Na<sub>0.5</sub>K<sub>0.5</sub>)NbO<sub>3</sub>- Bi<sub>0.5</sub>(Na<sub>0.90</sub>K<sub>0.10</sub>)<sub>0.5</sub>TiO<sub>3</sub> Ceramics

Dielectric and Piezoelectric Properties of Lead-Free (Na<sub>0.5</sub>K<sub>0.5</sub>)NbO<sub>3</sub>- Bi<sub>0.5</sub>(Na<sub>0.85</sub>K<sub>0.15</sub>)<sub>0.5</sub>TiO<sub>3</sub> Ceramics

Physical and Electrical Properties of Lead-Free (Na<sub>0.5</sub>K<sub>0.5</sub>)NbO<sub>3</sub>-(Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub> Ceramics

Physical and Electrical Properties of Lead-Free (Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub>-(Na<sub>0.5</sub>K<sub>0.5</sub>)NbO<sub>3</sub> Ceramics