Study of hardening and softening characteristics in A-site acceptor- and donor-doped lead-free piezoceramics
Abstract
The inconsistent and still unclear doping effects in BNT-BT lead-free ceramic as compared to that of PZT is one of the main reasons that have limited its usage in practical applications. In this study, the prospective hardening effects of A-site Ag dopant and softening effects of A-site La dopant in 0.93(Bi0.5Na0.5)TiO3-0.07BaTiO3 ceramics will be systematically investigated for the compositional ranges of either (Bi0.465Na0.465Ba0.07)1-xAgxTiO3 or (Bi0.465Na0.465Ba0.07)1-xLaxTiO3 (x = 0‒0.03), respectively. All samples are prepared via conventional solid state mixed oxide route with calcining and sintering temperature ranging between 800-900C and 1,100-1,200C, respectively. The effects of A-site acceptor and donor dopants on the crystal structure will be investigated qualitatively and quantitatively by using X-ray diffraction together with Rietveld refinement technique. The location of the defect in the structural site will be investigated using X-ray absorption spectroscopy technique. Microstructural changes will be studied by scanning electron microscopy (SEM). Finally, the effects of A-site acceptor- and donor- dopants on hardening/softening characteristics will be investigated through systematic studies of dielectric, piezoelectric, ferroelectric as well as electrical properties. The obtained result will provide more clarification on the effects of chemical modification in BNT-BT based ceramics, thus help facilitating a more successful development of lead-free piezoceramics as alternatives for PZT.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 04, 2023
- Source ID
- FA23862114130
Entities
People
- Sasipohn Prasertpalichat
Organizations
- Air Force Office of Scientific Research
- Faculty of Medical Science, Naresuan University
- United States Air Force