Robust CaZrO3-modified (K, Na)NbO3-based lead-free piezoceramics: High fatigue resistance insensitive to temperature and electric field

2015 ◽  
Vol 118 (13) ◽  
pp. 134102 ◽  
Author(s):  
Fang-Zhou Yao ◽  
Ke Wang ◽  
Yang Shen ◽  
Jing-Feng Li
Keyword(s):  
Electric Field ◽  
Fatigue Resistance ◽  
Lead Free ◽  
High Fatigue

(Na 1/2 Bi 1/2 )TiO 3 ‐based lead‐free co‐fired multilayer actuators with large strain and high fatigue resistance

2019 ◽  
Vol 102 (10) ◽  
pp. 6147-6155 ◽  
Author(s):  
Haibo Zhang ◽  
Weigang Ma ◽  
Bing Xie ◽  
Ling Zhang ◽  
Shuxiang Dong ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
Large Strain ◽  
Lead Free ◽  
High Fatigue ◽  
Multilayer Actuators

scholarly journals Effect of mesoscale phase contrast on fatigue-delaying behavior of self-healing hydrogels

2021 ◽  
Vol 7 (16) ◽  
pp. eabe8210
Author(s):  
Xueyu Li ◽  
Kunpeng Cui ◽  
Takayuki Kurokawa ◽  
Ya Nan Ye ◽  
Tao Lin Sun ◽  
...  
Keyword(s):  
Crack Growth ◽  
Fatigue Resistance ◽  
Phase Contrast ◽  
Stress Singularity ◽  
Soft Materials ◽  
Self Healing ◽  
Strong Phase ◽  
Mesoscale Structure ◽  
High Fatigue ◽  
Affine Deformation

We investigate the fatigue resistance of chemically cross-linked polyampholyte hydrogels with a hierarchical structure due to phase separation and find that the details of the structure, as characterized by SAXS, control the mechanisms of crack propagation. When gels exhibit a strong phase contrast and a low cross-linking level, the stress singularity around the crack tip is gradually eliminated with increasing fatigue cycles and this suppresses crack growth, beneficial for high fatigue resistance. On the contrary, the stress concentration persists in weakly phase-separated gels, resulting in low fatigue resistance. A material parameter, λtran, is identified, correlated to the onset of non-affine deformation of the mesophase structure in a hydrogel without crack, which governs the slow-to-fast transition in fatigue crack growth. The detailed role played by the mesoscale structure on fatigue resistance provides design principles for developing self-healing, tough, and fatigue-resistant soft materials.

Large strain and strain memory effect in bismuth ferrite lead-free ceramics

2017 ◽  
Vol 5 (37) ◽  
pp. 9528-9533 ◽  
Author(s):  
Jing Lv ◽  
Weiwei Gao ◽  
Junning Li ◽  
Tangyuan Li ◽  
Changbai Long ◽  
...  
Keyword(s):  
Electric Field ◽  
Memory Effect ◽  
Large Strain ◽  
Bismuth Ferrite ◽  
Ferroelectric Materials ◽  
Lead Free ◽  
Lead Free Ceramics ◽  
Electric Field Induced Strain

An electric-field-induced strain in ferroelectric materials has extensive applications in actuators and sensors.

High Bipolar Fatigue Resistance of BCTZ Lead-Free Piezoelectric Ceramics

2015 ◽  
Vol 99 (1) ◽  
pp. 174-182 ◽  
Author(s):  
Yichi Zhang ◽  
Julia Glaum ◽  
Matthias C. Ehmke ◽  
John E. Blendell ◽  
Keith J. Bowman ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
Piezoelectric Ceramics ◽  
Lead Free

scholarly journals Effect of Electric Field Concentration by Electrode Patterning on the Incipient Piezoelectric Strain Properties of Lead-Free Piezoceramics

2019 ◽  
Vol 56 (6) ◽  
pp. 549-557 ◽  
Author(s):  
Woo-Seok Kang ◽  
Chang-Hyo Hong ◽  
Young-Jin Lee ◽  
Gangho Choi ◽  
Dong-Jin Shin ◽  
...  
Keyword(s):  
Electric Field ◽  
Lead Free ◽  
Piezoelectric Strain

Preparation and enhanced electric-field-induced strain of textured 91BNT–6BT–3KNN lead-free piezoceramics by TGG method

2015 ◽  
Vol 27 (3) ◽  
pp. 3076-3081 ◽  
Author(s):  
Sixiang Ma ◽  
Yangyang Zhang ◽  
Zepeng Liu ◽  
Xueping Dai ◽  
Jinqiang Huang ◽  
...  
Keyword(s):  
Electric Field ◽  
Lead Free ◽  
Electric Field Induced Strain
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