Dielectric and Raman studies of Ba-0.06(Na1/2Bi1/2)(0.94)TiO3-NaNbO3 ceramics

In this work the X-ray diffraction, scanning electron microscopy, Raman and dielectric studies of lead free perovskite (1-x)Ba-0.06(Na1/2Bi1/2)(0.94)TiO3-xNaNbO(3) (0 <= x <= 1.0) ceramics, prepared using a standard solid state reaction method, were investigated. X-ray diffraction studies of all the ceramics suggested the formation of single phase with crystal structure transforming from rhombohedral-tetragonal to orthorhombic symmetry with the increase in NaNbO3 content. Raman spectra also confirmed the formation of solid solution without any new phase. Dielectric studies showed that the phase transition is of diffusive character and diffusivity parameter decreases with increasing NaNbO3 content. The compositional fluctuation was considered to be the main cause of diffusivity

Individualised risk prediction model for exacerbations in patients with severe asthma : Protocol for a multicentre real-world risk modelling study

Funding Information: This work was supported by Singapore Ministry of Education Tier 1 Grant (22-4820-A0001-0). Publisher Copyright: © Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. © Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.Peer reviewedPublisher PD