New potassium–sodium niobate ternary system with large piezoelectric coefficient and high Curie temperature

2016 ◽  
Vol 27 (9) ◽  
pp. 9812-9820 ◽  
Author(s):  
Laiming Jiang ◽  
Zhi Tan ◽  
Jie Xing ◽  
Jiagang Wu ◽  
Qiang Chen ◽  
...  
Keyword(s):  
Ternary System ◽  
Curie Temperature ◽  
Piezoelectric Coefficient ◽  
High Curie Temperature ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Potassium Sodium

Advances in the modification of the contradictory relationship between piezoelectricity and Curie temperature: simultaneous realization of large piezoelectricity and high Curie temperature in potassium sodium niobate-based ferroelectrics

2020 ◽  
Vol 8 (28) ◽  
pp. 9506-9510 ◽  
Author(s):  
Jian Ma ◽  
Juan Wu ◽  
Bo Wu ◽  
Wenjuan Wu
Keyword(s):  
High Temperature ◽  
Curie Temperature ◽  
Temperature Fields ◽  
High Curie Temperature ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Practical Applications ◽  
Balanced Development ◽  
Potassium Sodium

Herein, we achieved a balanced development of piezoelectricity and Curie temperature, which would promote the practical applications of KNN-based ceramics in high temperature fields.

Preperation of Lead-Free Potassium Sodium Niobate Based Piezoelectrics and their Electromechanical Characteristics

2012 ◽  
Vol 445 ◽  
pp. 492-496 ◽  
Author(s):  
Ayse Berksoy ◽  
Ebru Mensur Alkoy
Keyword(s):  
Curie Temperature ◽  
Copper Oxide ◽  
Perovskite Phase ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Sintering Aid ◽  
Potassium Sodium ◽  
Copper Addition ◽  
Additional Peak ◽  
Pure Perovskite Phase

In this study, %7 Li modified and 0.67 % copper oxide added potassium sodium niobate (KNN) ceramics were investigated. Copper oxide was used as a sintering aid. The ceramics were prepared with conventional solid state calcination technique. All samples were crystallized in pure perovskite phase with no additional peak. The density of the samples increased with copper addition and lithium modification. The Curie temperature of KNN ceramics was found to shift to lower temperatures by CuO addition. The Curie temperature was measured as 414°C and 504°C for copper oxide added and lithium modified KNN samples, respectively. The maximum strain of copper oxide added sample was 0.12%, whereas Li modified KL ceramics yielded up to 0.10 %.

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.

Modification of both d33 and TC in a potassium–sodium niobate ternary system

2015 ◽  
Vol 44 (48) ◽  
pp. 21141-21152 ◽  
Author(s):  
Bo Wu ◽  
Jiagang Wu ◽  
Dingquan Xiao ◽  
Jianguo Zhu
Keyword(s):  
Ternary System ◽  
Lead Free ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Potassium Sodium ◽  
System P

In this work, we simultaneously achieved a giant d33 and a high TC in a lead-free piezoelectric ternary system of (1 − x − y)K0.48Na0.52NbO3–xBiFeO3–yBi0.5Na0.5ZrO3 {(1 − x − y)KNN–xBF–yBNZ}.

scholarly journals Synthesis of Potassium-Sodium Niobate (KNN) from NbO2

Open Ceramics ◽  
2021 ◽  
pp. 100159
Author(s):  
Cerem Piskin ◽  
Levent Karacasulu ◽  
Mauro Bortolotti ◽  
Cekdar Vakifahmetoglu
Keyword(s):  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Potassium Sodium

Investigation of the domain structure and hierarchy in potassium–sodium niobate lead-free piezoelectric single crystals

RSC Advances ◽  
2016 ◽  
Vol 6 (54) ◽  
pp. 49060-49067 ◽  
Author(s):  
Micka Bah ◽  
Natalya Alyabyeva ◽  
Richard Retoux ◽  
Fabien Giovannelli ◽  
Mustapha Zaghrioui ◽  
...  
Keyword(s):  
Single Crystals ◽  
Domain Structure ◽  
Lead Free ◽  
Nanometer Scale ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Length Scales ◽  
Potassium Sodium ◽  
Domain Structures ◽  
Self Organized

We reported self-organized and hierarchized domain structures on various length scales ranging from micrometer to nanometer scale in K0.5Na0.5NbO3 crystals.

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