Composite films based on dispersions of bismuth ferrite (BiFeO3) in polyvinylidene fluoride (PVDF) matrixes were prepared the presence multiwalled-carbon-nanotubes (MWCNT), using xanthan gum (XG) as dispersant. Films by spin coating and characterized infrared spectroscopy (FTIR) electronic microscopy (SEM). SEM images showed that samples containing MWCNT XG presented a uniform morphology with h...

The piezoelectric modulus of wurtzite aluminum nitride (AlN) is a critical material parameter for electrical components, ultimately contributing to the energy efficiency and achievable bandwidth modern communication devices. Here, we demonstrate that introduction metallic point-defects (Ti, Zr, Hf) improves as-received, unstrained, epitaxially grown AlN. metals are incorporated by ion implantat...

Piezoelectric Poly (vinylidene fluoride) (PVDF) films with high flexibility are a suitable and promising replacement for rigid ceramic piezoelectric materials. However, this purpose, enhancing properties adopting an industrial fabrication method of great importance. In study, 5–9 µm thick PVDF were fabricated by nozzle-less ultrasonic spray coating (USC) system, followed annealing process at 10...

In this paper, the effects of CuO sintering aids on microstructure and electric properties are investigated for non-stoichiometric (Na0.48K0.473Li0.04Sr0.007)(Nb0.883Ta0.05Sb0.06Ti0.007)O3+x mol% lead free ceramics. As amounts equal 1 mol%, temperature is 975 °C piezoelectric parameters d33 = 200 pC/N, g33 38 (10−3 Vm/N), × 7600 (10−15 m2/N), kp 0.38, Qm 240, Pr 18.93 μC/cm2 EC 8.75 kV/cm. The ...

Samples of 0.96(K0.48Na0.48Li0.04)(Nb0.95Sb0.05)O3-0.04Bi0.5(Na0.82K0.18)0.5ZrO3 piezoelectric ceramic were fabricated with conventional techniques and sintered at different temperatures. The effect sintering temperature (TS) on the structure, microstructure, properties ceramics was studied in detail. experimental results showed that an increase TS temperature, structure transformed from orthor...

Here, (K0.44Na0.52Li0.04)(Nb0.9−xTa0.1Sbx)O3 [KNL−(N0.9−xTSx)] lead-free ceramics with potential technological applications are made through B-position substitution on the perovskite structure by Sb ions. This strategy generates crystal changes and stabilizes a tetragonal symmetry, T, giving place to an orthorhombic (O–T) phase boundary close room temperature. Specifically, our results establis...