Thermoplastic polyurethane elastomer induced shear piezoelectric coefficient enhancement in bismuth sodium titanate – PVDF composite films

2020 ◽  
Vol 138 (6) ◽  
pp. 49818
Author(s):  
Zexia Dai ◽  
Zhixuan Feng ◽  
Congcong Feng ◽  
Liyan Meng ◽  
Chunying Li ◽  
...  
Keyword(s):  
Piezoelectric Coefficient ◽  
Thermoplastic Polyurethane ◽  
Composite Films ◽  
Sodium Titanate ◽  
Polyurethane Elastomer ◽  
Bismuth Sodium Titanate ◽  
Thermoplastic Polyurethane Elastomer ◽  
Bismuth Sodium

Preparation and Properties of Bi0.5Na0.5TiO3-Ba (Hf,Ti)TiO3 Lead-Free Piezoelectric Ceramics

2007 ◽  
Vol 334-335 ◽  
pp. 957-960
Author(s):  
Hu Yong Tian ◽  
Wan Ping Chen ◽  
D.Y. Wang ◽  
Y. Wang ◽  
J.T. Zeng ◽  
...  
Keyword(s):  
Piezoelectric Coefficient ◽  
Sodium Titanate ◽  
Piezoelectric Ceramics ◽  
Lead Free ◽  
Synthesis Process ◽  
Bismuth Sodium Titanate ◽  
Promising Candidate ◽  
Device Applications ◽  
The Relationship ◽  
Bismuth Sodium

Lead-free piezoelectric ceramics based on bismuth sodium titanate (BNT) -barium hafnate titanate (BHT) were prepared by a two-step synthesis process. The final BNT-BHT ceramics sintered at 1180oC for 2 h in air showed a perovskite structure with high density. The morphotropic phase boundaries (MPB) were found in BNT based piezoelectric ceramics with 8~10 wt% BHT in composites. In the case of Bi0.5Na0.5TiO3-0.08BaHf0.05Ti0.95O3 ceramics, a maximum piezoelectric coefficient d33 of 122.6 pC/N was obtained. The remnant polarization (Pr) and coercive field (Ec) were measured and the relationship between ferroelectricity and the BHT fraction in the compounds was investigated. The BNT-BHT ceramics were expected to be a new and promising candidate for lead-free piezoelectric device applications.

Fabrication of 0-3 Non-Lead Based Piezoceramic/Polymer Composites Using Suction Technique

2008 ◽  
Vol 55-57 ◽  
pp. 141-144 ◽  
Author(s):  
Thanapong Sareein ◽  
Wandee Thamjaree ◽  
Wim Nhuapeng ◽  
Tawee Tunkasiri
Keyword(s):  
Epoxy Resin ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Active Phase ◽  
Sodium Titanate ◽  
Bismuth Sodium Titanate ◽  
Volumetric Fraction ◽  
Bismuth Sodium ◽  
Composite Samples ◽  
Properties Of Composites

In this research, 0-3 composites between non-lead based piezoceramic and polymer were fabricated using the suction technique. Bismuth sodium titanate (Bi0.5Na0.5TiO3:BNT) which prepared from conventional mixed oxide method was used as active phase whereas epoxy resin was used as matrix phase. The 50% volumetric fraction of BNT/epoxy resin can obtain from suction technique. The physical and piezoelectric properties of composites samples were examined. It can be found that density of composite samples were about 1.78 g/cm3. Moreover, the piezoelectric coefficient (d33) of sample was 13 pC/N. Furthermore, the microstructure of composites was determined using SEM technique.

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