scholarly journals Emerging new phase boundary in potassium sodium-niobate based ceramics

2020 ◽  
Vol 49 (3) ◽  
pp. 671-707 ◽  
Author(s):  
Xiang Lv ◽  
Jianguo Zhu ◽  
Dingquan Xiao ◽  
Xi-xiang Zhang ◽  
Jiagang Wu
Keyword(s):  
Phase Boundary ◽  
High Performance ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Potassium Sodium ◽  
New Phase

A review of the newly emerging “new phase boundary” in potassium sodium niobate-based ceramics with high performance.

LEAD BARIUM POTASSIUM SODIUM NIOBATE CERAMICS FOR PIEZOELECTRIC APPLICATIONS

2008 ◽  
Vol 22 (12) ◽  
pp. 1961-1976 ◽  
Author(s):  
K. SAMBASIVA RAO ◽  
N. VALLISNATH ◽  
T. N. V. K. V. PRASAD ◽  
K. CH. VARADA RAJULU ◽  
B. TILAK ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Systematic Study ◽  
Applied Voltage ◽  
Piezoelectric Transducer ◽  
Tungsten Bronze ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Potassium Sodium ◽  
Piezoelectric Constants

This paper reports a systematic study of tungsten bronze morphotropic phase boundary (MPB) system Pb 2-2X-3Y/2 Ba 2x RE y K 1-x Na x Nb 5 O 15, where, x = 0.20, 0.25, 0.30, RE = Pr and Bi and y = 0.05 and their structure, microstructure, hysteresis, dielectric, piezoelectric, and Pyroelectric properties. Enhanced piezoelectric constants kp, kt, k31, d31, d33, g31, g33, [Formula: see text] as 30.8%, 47.6%, 18.9%, 57 × 10-12 C/N , 159 × 10-12 C/N , 6.89 × 10-3 mV/N , 19.23 × 10-3 mV/N , and 13.88 × 10-12 m 2/ N respectively are observed in the composition for which y = 0, and x = 0.30, which is above MPB. Also, a change in thickness, 0.0159 μm has been developed for a thickness of the sample 1.2 mm, d33 = 159 × 10-12 C/N and for an applied voltage of 100 V. The same material produces a length extension, 0.0475 μm for d31 = 57 × 10-12 C/N , l = 10 mm , t = 1.2 mm , for an applied voltage of 100 V. Thus the material may be useful for a piezoelectric transducer. Enhanced piezoelectric coefficients, d31 = 96 × 10-12 C/N and g33 = 12.95 × 10-3 mV/N are also observed in the composition for which RE = Pr and x = 0.25.

scholarly journals Synergetic Contributions in Phase Boundary Engineering to the Piezoelectricity of Potassium Sodium Niobate Lead-Free Piezoceramics

2020 ◽  
Vol 12 (35) ◽  
pp. 39455-39461
Author(s):  
Xiang Lv ◽  
Junwei Zhang ◽  
Yao Liu ◽  
Fei Li ◽  
Xi-xiang Zhang ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Lead Free ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Potassium Sodium

Enhanced temperature stability in the R–T phase boundary with dominating intrinsic contribution

2018 ◽  
Vol 20 (30) ◽  
pp. 20149-20159 ◽  
Author(s):  
Xiang Lv ◽  
Jiagang Wu ◽  
Jianguo Zhu ◽  
Dingquan Xiao
Keyword(s):  
Phase Boundary ◽  
Temperature Stability ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Potassium Sodium ◽  
T Phase

An effective method to simultaneously improve strain and its temperature stability in potassium sodium-niobate-based ceramics.

Shifting the phase boundary: Potassium sodium niobate derivates

MRS Bulletin ◽  
2018 ◽  
Vol 43 (8) ◽  
pp. 607-611 ◽  
Author(s):  
Ke Wang ◽  
Barbara Malič ◽  
Jiagang Wu
Keyword(s):  
Phase Boundary ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Potassium Sodium ◽  
Image Position

Abstract

High-performance piezoelectric-energy-harvester and self-powered mechanosensing using lead-free potassium–sodium niobate flexible piezoelectric composites

2018 ◽  
Vol 6 (34) ◽  
pp. 16439-16449 ◽  
Author(s):  
Mengjun Wu ◽  
Ting Zheng ◽  
Haiwu Zheng ◽  
Jifang Li ◽  
Weichao Wang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
High Performance ◽  
Energy Harvester ◽  
Lead Free ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Piezoelectric Composites ◽  
Potassium Sodium ◽  
Piezoelectric Energy ◽  
Self Powered

A flexible piezoelectric nanogenerator (PENG) was fabricated based on a new inorganic piezoelectric KNN–BNZ–AS–Fe, which exhibited the great potential in energy harvesting and self-powered mechanosensing.

scholarly journals Enhanced electrocaloric effect near polymorphic phase boundary in lead-free potassium sodium niobate ceramics

2017 ◽  
Vol 110 (6) ◽  
pp. 063904 ◽  
Author(s):  
Xiangjian Wang ◽  
Jiagang Wu ◽  
Brahim Dkhil ◽  
Baixiang Xu ◽  
Xiaopeng Wang ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Lead Free ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Electrocaloric Effect ◽  
Potassium Sodium
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