Effects of YMnO3 Addition on Phase Structure, Microstructure and Electrical Properties of (Na0.515K0.485)0.94Li0.06(Nb0.8Ta0.2)O3 Lead-Free Ceramics

2014 ◽  
Vol 979 ◽  
pp. 167-170
Author(s):  
Pornsuda Bomlai
Keyword(s):  
Grain Size ◽  
Electrical Properties ◽  
Phase Structure ◽  
Dissipation Factor ◽  
Lead Free ◽  
Low Dielectric ◽  
Lead Free Ceramics ◽  
Dielectric Dissipation Factor ◽  
Sintering Method ◽  
Piezoelectric Devices

The (1-x)[(Na0.515K0.485)0.94Li0.06(Nb0.8Ta0.2)O3]-xYMnO3 (x = 0, 0.005, 0.01, 0.015 and 0.02) lead-free ceramics were synthesized by solid-state reaction sintering method. It was found that the addition of YMnO3 affected on the grain size, phase structure and electrical properties of (Na0.515K0.485)0.94Li0.06(Nb0.8Ta0.2)O3 ceramics. The grain size decreased with increasing YMnO3 content (x ≥ 0.01) and led to poor densification. The ceramic doped with 0.5 mol% YMnO3 showed good electrical properties such as d33 = 195 pC/N, kp = 43.9 %, Tc = 292 °C, TO−T = 35 °C, εr = 820 and rather low dielectric dissipation factor = 2.1%. This indicates that 0.5 mol% YMnO3 -doped (Na0.515K0.485)0.94Li0.06(Nb0.8Ta0.2)O3 piezoceramic is an alternative lead-free piezoelectric material for the development of piezoelectric devices working at high temperature.

Two-Step Sintering, Microstructure and Electrical Properties of (Ba, Ca)(Ti, Zr)O3 Lead-Free Ceramics

2015 ◽  
Vol 749 ◽  
pp. 79-83
Author(s):  
Pornsuda Bomlai
Keyword(s):  
Phase Transition ◽  
Grain Size ◽  
Electrical Properties ◽  
Piezoelectric Properties ◽  
Orthorhombic Phase ◽  
Lead Free ◽  
Lead Free Ceramics ◽  
Average Grain Size ◽  
Sintering Method ◽  
Dielectric And Piezoelectric Properties

In this work, the (Ba1-xCax)(Ti1-yZry)O3 lead-free ceramics were prepared by the two-step sintering method, and effects of Ca and Zr contents on phase structure, densification, microstructure, and electrical properties were investigated. It was found that all samples showed orthorhombic phase. The highest density of 5.84 ± 0.01 g/cm3 was achieved in x = 0.05, y = 0.05 sample. The average grain size, phase transition temperature, dielectric and piezoelectric properties significantly decreased by introducing of the Ca/Zr content. The ceramics with a small amount of Ca and Zr maintain good piezoelectric properties, and a lower dielectric loss. The composition with x = 0.05, y = 0.025 demonstrated optimum electrical properties of d33 ∼211 pC/N, TC ∼ 119 °C, εr ∼ 1788, and tanδ ∼ 0.04.

Relationship between phase structure and electrical properties of (K0.5Na0.5)NbO3–LiTaO3 lead-free ceramics

2012 ◽  
Vol 12 (2) ◽  
pp. 504-508 ◽  
Author(s):  
Hongqiang Wang ◽  
Dingshan Ruan ◽  
Ye-Jing Dai ◽  
Xiao-Wen Zhang
Keyword(s):  
Electrical Properties ◽  
Phase Structure ◽  
Lead Free ◽  
Lead Free Ceramics

Phase structure and electrical properties of Sn and Zr modified BaTiO3 lead-free ceramics

2017 ◽  
Vol 43 (1) ◽  
pp. 641-649 ◽  
Author(s):  
Ning Wang ◽  
Bo-Ping Zhang ◽  
Jian Ma ◽  
Lei Zhao ◽  
Jun Pei
Keyword(s):  
Electrical Properties ◽  
Phase Structure ◽  
Lead Free ◽  
Lead Free Ceramics

Microstructure, electrical properties and temperature stability in Bi0.5Na0.5Zr0.95Ce0.05O3 modified R–T phase boundary of potassium-sodium niobium lead-free ceramics

RSC Advances ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 6983-6989 ◽  
Author(s):  
Zhi Tan ◽  
Jie Xing ◽  
Laiming Jiang ◽  
Lingguang Sun ◽  
Jiagang Wu ◽  
...  
Keyword(s):  
Solid State ◽  
Electrical Properties ◽  
Phase Boundary ◽  
Temperature Stability ◽  
Lead Free ◽  
Lead Free Ceramics ◽  
Solid State Sintering ◽  
T Phase ◽  
Sintering Method ◽  
Doping Ratio

(1 − x)K0.48Na0.52Nb0.95Sb0.05O3–xBi0.5Na0.5Zr0.95Ce0.05O3 [(1 − x)KNNS–xBNZC] lead-free piezoelectric ceramics, with doping ratio of x ranging from 0 to 0.05, were synthesized by the conventional solid state sintering method.

Phase structure and electrical properties of (K0.5Na0.5)NbO3–(Bi0.5Na0.5)ZrO3 lead-free ceramics with a sintering aid of ZnO

2014 ◽  
Vol 40 (9) ◽  
pp. 14601-14605 ◽  
Author(s):  
Fangxu Li ◽  
Dingquan Xiao ◽  
Jiagang Wu ◽  
Zhuo Wang ◽  
Chao Liu ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Phase Structure ◽  
Lead Free ◽  
Sintering Aid ◽  
Lead Free Ceramics

Compositional dependence of phase structure and electrical properties in (K0.42Na0.58)NbO3-LiSbO3 lead-free ceramics

2007 ◽  
Vol 102 (11) ◽  
pp. 114113 ◽  
Author(s):  
Jiagang Wu ◽  
Dingquan Xiao ◽  
Yuanyu Wang ◽  
Jianguo Zhu ◽  
Ping Yu ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Phase Structure ◽  
Lead Free ◽  
Compositional Dependence ◽  
Lead Free Ceramics
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