Enhanced electrocaloric strengths at room temperature in (SrxBa1−x)(Sn0.05Ti0.95)O3 lead-free ceramics

2021 ◽  
Vol 871 ◽  
pp. 159519
Author(s):  
Sheng-Guo Lu ◽  
Xiongwei Lin ◽  
Jiang Li ◽  
Dandan Li ◽  
Yingbang Yao ◽  
...  
Keyword(s):  
Room Temperature ◽  
Lead Free ◽  
Lead Free Ceramics

Dielectric, Piezoelectric and Ferroelectric Properties of (1-x)K0.5Na0.5NbO3–xBiGaO3 Lead-Free Ceramics

2013 ◽  
Vol 634-638 ◽  
pp. 2345-2348 ◽  
Author(s):  
Hong Mei Zhang ◽  
Shao Bo Qu ◽  
Jing Bo Zhao ◽  
Hong Liang Du
Keyword(s):  
Solid State ◽  
Electrical Properties ◽  
Piezoelectric Ceramic ◽  
Room Temperature ◽  
Piezoelectric Properties ◽  
Ferroelectric Properties ◽  
Lead Free ◽  
Practical Applications ◽  
Lead Free Ceramics ◽  
Solid State Sintering

(1-X)K0.5Na0.5NbO3–xBiGaO3[(1-X)KNN-Xbg] Lead-Free Ceramics with Different Additive of Bigao3 Were Synthesized by Conventional Solid-State Sintering Technique. Dielectric, Piezoelectric and Ferroelectric Properties of (1-X)KNN-Xbg Lead-Free Ceramics Were Studied. it Is Found that the Piezoelectric Properties Was Improved due to the Additive Bigao3，The Ceramics X=0.01 near Room Temperature Exhibit Excellent Electrical Properties D33=152pC/N, TC=372 °C. these Results Indicate that Bigao3 Adjusted K0.5Na0.5NbO3-Based Ceramics Materials Are Promising Lead-Free Piezoelectric Ceramic Candidates for Practical Applications.

Large Piezoelectricity in NaNbO3-based Lead-free Ceramics via Tuning Oxygen Octahedral Tilt

2022 ◽  
Author(s):  
Lu Wang ◽  
He Qi ◽  
Botao Gao ◽  
Ye Liu ◽  
Hui Liu ◽  
...  
Keyword(s):  
Local Structure ◽  
High Performance ◽  
Room Temperature ◽  
Lead Free ◽  
Lead Free Ceramics

The development of high-performance lead-free piezoceramics for replacing Pb-based perovskites has attracted lots of attention, and comparable room-temperature piezoresponse has been realized in (Na,K)NbO3 and BaTiO3-based ceramics with local structure...

scholarly journals Structure, dielectric, and piezoelectric properties of K0.5Na0.5NbO3-based lead-free ceramics

RSC Advances ◽  
2018 ◽  
Vol 8 (43) ◽  
pp. 24286-24296 ◽  
Author(s):  
Sushmita Dwivedi ◽  
Tanvi Pareek ◽  
Sunil Kumar
Keyword(s):  
Room Temperature ◽  
Piezoelectric Properties ◽  
Lead Free ◽  
X Ray Diffraction ◽  
X Ray ◽  
System P ◽  
Lead Free Ceramics ◽  
Diffraction Patterns ◽  
Dielectric And Piezoelectric Properties

Room temperature powder X-ray diffraction patterns of (1 – x)K0.5Na0.5NbO3–xBi(Zn0.5Ti0.5)O3 system.

Dielectric, Piezoelectric, Pyroelectric Properties and Polymorphic Phase Transition of 0.95 (KXNa1-X) NbO3-0.05LiSbO3 Lead-Free Ferroelectric Ceramics

2013 ◽  
Vol 377 ◽  
pp. 161-165
Author(s):  
Yang Yang Zhang ◽  
Jin Ping Zhang ◽  
Er Ping Wang ◽  
Sheng Lin Jiang ◽  
Lin Lu
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Electrical Properties ◽  
Room Temperature ◽  
Lead Free ◽  
Ferroelectric Ceramics ◽  
Polymorphic Phase Transition ◽  
Lead Free Ceramics ◽  
Enhanced Properties ◽  
Tetragonal Phase Transition

0.95 (KXNa1-X) NbO3-0.05 LiSbO3(KNN-LS-X) (X=0.4-0.5) lead-free ceramics were prepared by conventional solid method. The effect of K/Na ratio on the dielectric, piezoelectric, pyroelectric and polymorphic phase transition was studied. The results show that the electrical properties strongly depend on the K/Na ratio. The KNN-LS-X(X=0.45) ceramics exhibit enhanced properties (εr=891.267,d33=222pC/N,Kp=0.43517,Qm=64.72,p=15×10-4C/m2K). Enhanced electrical properties of the KNN-LS-X (X=0.45) ceramics could be attributed to the effect of K/Na ratio modifying the polymorphic orthorhombic-tetragonal phase transition temperature to room temperature, which could make KNN-LS-X (X=0.45) ceramics use as a new ferroelectric sensor.

scholarly journals Dielectric Spectroscopy of the (K0.44Na0.52Li0.04)0.97La0.01Nb0.9Ta0.1O3 Ceramic Obtained by Sol-Gel

2020 ◽  
Author(s):  
R. López-Noda ◽  
J. Portelles ◽  
G. Rojas-George ◽  
A. Reyes-Rojas ◽  
J. Fuentes ◽  
...  
Keyword(s):  
Room Temperature ◽  
Ferroelectric Phase ◽  
Sol Gel ◽  
Rietveld Analysis ◽  
Lead Free ◽  
Solid State Method ◽  
Conduction Mechanisms ◽  
Lead Free Ceramics ◽  
State Method ◽  
Template Grain Growth

Abstract (K0.44Na0.52Li0.04)0.97La0.01Nb0.9Ta0.1O3 lead free ceramics were synthesized by sol-gel method. Their morphology, crystal structure and spectroscopic dielectric properties were analyzed by the appropriate techniques. The co-existence of an orthorhombic and a tetragonal ferroelectric phase at room temperature is confirmed by Rietveld analysis. La and Li cations are effective in shifting down the ferroelectric transition temperatures. The tetragonal to cubic transition, (TT-C), takes place at 371 °C while the orthorhombic to tetragonal, (TO-T), occurs at 110 °C, and the maximum relative permittivity (ɛmax) at TT-C is 3000, which is among the highest for KNN-based ceramics obtained by different methods. Conductivity behaves according to Jonscher’s law in the frequency and temperature range of this study. The activation energy values corresponding to the different conduction mechanisms were obtained. The results were compared with those for the same composition obtained by combining the reactive template grain growth (RTGG) technique and the solid-state method.

Room temperature antiferroelectric-phase stability in BNT-BT lead-free ceramics

2017 ◽  
Vol 525 ◽  
pp. 114-118 ◽  
Author(s):  
J.D.S. Guerra ◽  
A. Peláiz-Barranco ◽  
F. Calderón-Piñar ◽  
Y. Mendez-González
Keyword(s):  
Phase Stability ◽  
Room Temperature ◽  
Lead Free ◽  
Antiferroelectric Phase ◽  
Lead Free Ceramics

scholarly journals Progress on the doping and phase boundary design of potassium–sodium niobate lead-free ceramics

2018 ◽  
Vol 08 (03) ◽  
pp. 1830003 ◽  
Author(s):  
Jie Xing ◽  
Ting Zheng ◽  
Jiagang Wu ◽  
Dingquan Xiao ◽  
Jianguo Zhu
Keyword(s):  
Room Temperature ◽  
Piezoelectric Properties ◽  
Lead Free ◽  
High Curie Temperature ◽  
Sodium Niobate ◽  
Sintering Aids ◽  
Potassium Sodium Niobate ◽  
Phase Boundaries ◽  
Potassium Sodium ◽  
Lead Free Ceramics

Potassium–sodium niobate (K,Na)NbO3/(KNN) lead-free ceramics have drawn vast amount of attention as one of the effective alternatives to lead-based ones. In recent years, the author’s group concentrated their work on KNN-based ceramics. This paper reviews the main obtained results in authors’ laboratory on how to enhance the piezoelectric properties of KNN-based ceramics, including the ions or compounds substitution, the constructing and types of phase boundaries near room temperature, the investigation of other tools (sintering aids, synthesis technique, poling conditions) on properties. All the published papers up to now show the developing higher performance with maintaining high Curie temperature of KNN-based ceramics which has great potential for the future and is the key to success for the field.

Effect of LiSbO3 Content on the Microstructure and Piezoelectric Properties of K0.5Na0.5NbO3 Lead-free Ceramics Doped with BiMnO3

2013 ◽  
Vol 28 (3) ◽  
pp. 321-325
Author(s):  
Min-Hong JIANG ◽  
Xin-Yu LIU ◽  
Guo-Hua CHEN ◽  
Gui-Sheng ZHU ◽  
Ji-Wen XU ◽  
...  
Keyword(s):  
Piezoelectric Properties ◽  
Lead Free ◽  
Lead Free Ceramics

Sintering Processing and Piezoelectric Properties of K0.5Na0.5NbO3-BiFeO3 Lead-free Ceramics

2009 ◽  
Vol 24 (6) ◽  
pp. 1178-1182
Author(s):  
Min-Hong JIANG ◽  
He-Xin CHEN ◽  
Xin-Yu LIU ◽  
Li-Qing YANG ◽  
Chang-Rong ZHOU
Keyword(s):  
Piezoelectric Properties ◽  
Lead Free ◽  
Lead Free Ceramics

scholarly journals Boosted piezoelectricity with excellent thermal stability in tetragonal NaNbO3-based ceramics

2020 ◽  
Author(s):  
Lu Wang ◽  
Shengdong Sun ◽  
Huajie Luo ◽  
Yang Ren ◽  
Hui Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Temperature Stability ◽  
Lead Free ◽  
Excellent Thermal Stability ◽  
Lead Free Ceramics ◽  
Piezoelectric Performance

The realization of high piezoelectric performance and excellent temperature stability simultaneously in lead-free ceramics is the key for replacing Pb-containing perovskites in industry. In this study, large piezoelectric performance (d33...

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