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In August 2022, the "Pfizer-BioNTech COVID-19 Vaccine, Bivalent (Original and Omicron BA.4/BA.5)" (in short: "COVID-19 Vaccine, Bivalent") received an emergency use authorization from the US Food and Drug Administration (FDA) for use as a booster dose in individuals aged twelve years of age and older.
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Rachael Louise Gunn (born 2 September 1987), known competitively as Raygun, is an Australian academic and competitive breakdancer. In September 2024, she became ranked as the world number 1, by the World DanceSport Federation. [1] She is a lecturer in the Department of Media, Communications, Creative Arts, Language and Literature at Macquarie ...
- Synthesis
- Structure
- Physical Properties
- Applications
- Further Reading
Na0.5Bi0.5TiO3 is not a naturally occurring mineral and several synthesis routes to obtain the compound have been developed. It can be easily prepared by solid state reaction between Na2CO3, Bi2O3 and TiO2at temperatures around 850 °C.
The exact room-temperature crystal structure of sodium bismuth titanate has been a matter of debate for several years. Early studies in the 1960s using X-ray diffraction suggested Na0.5Bi0.5TiO3 to adopt either a pseudo-cubic or a rhombohedral crystal structure. In 2010, based on the high-resolution single-crystal X-ray diffraction data, a monoclin...
Na0.5Bi0.5TiO3 is a relaxor ferroelectric. Its optical band gap was reported to be in the 3.0–3.5 eV.
Various solid solutions with tetragonal ferroelectric perovskites including BaTiO3, Bi0.5K0.5TiO3 have been developed to obtain morphotropic phase boundaries to enhance the piezoelectric properties of Na0.5Bi0.5TiO3. The extraordinarily large strain generated by a field-induced phase transition in sodium bismuth titanate-based solid solutions promp...
Lead-Free Piezoelectrics, Ed. Shashank Priya and Sahn Nahm,(2012), Springer-Verlag, New York. doi:10.1007/978-1-4419-9598-8.
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