(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

Enhanced fatigue resistance and lattice dynamics induced by the strong local strain in Fe-doped KTa1-xNbxO3 single crystal

2021 ◽  
Author(s):  
Xiaolin Huang ◽  
Peng Tan ◽  
Yu Wang ◽  
Yao Zhang ◽  
Xiangda Meng ◽  
...  
Keyword(s):  
Single Crystal ◽  
Fatigue Resistance ◽  
Lattice Dynamics ◽  
Piezoelectric Materials ◽  
Local Strain ◽  
Lead Free ◽  
Fatigue Properties ◽  
Practical Applications ◽  
Local Structures ◽  
The Impact

Improvement of durability is greatly important for the practical applications of lead-free-doped piezoelectric materials. However, the promotional mechanism of anti-fatigue properties and the impact on local structures from ion dopants...

Multi-Arch-Structured All-Carbon Aerogels with Superelasticity and High Fatigue Resistance as Wearable Sensors

2020 ◽  
Vol 12 (14) ◽  
pp. 16822-16830 ◽  
Author(s):  
Jiankun Huang ◽  
Jingbin Zeng ◽  
Baoqiang Liang ◽  
Junwei Wu ◽  
Tongge Li ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
Wearable Sensors ◽  
Carbon Aerogels ◽  
High Fatigue

scholarly journals Origin of the large strain response in (K0.5Na0.5)NbO3-modified (Bi0.5Na0.5)TiO3–BaTiO3 lead-free piezoceramics

2009 ◽  
Vol 105 (9) ◽  
pp. 094102 ◽  
Author(s):  
Wook Jo ◽  
Torsten Granzow ◽  
Emil Aulbach ◽  
Jürgen Rödel ◽  
Dragan Damjanovic
Keyword(s):  
Large Strain ◽  
Lead Free ◽  
Strain Response
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