BIFEO3-BATIO3: A NEW GENERATION OF LEAD-FREE ELECTROCERAMICS

Lead-based electroceramics such as Pb(Zr.Ti)O3 (PZT) and its derivatives have read more excellent piezoelectric, pyroelectric and energy storage properties and can be used in a wide range of applications.Potential lead-free replacements for PZT such as potassium sodium niobate (KNN) and sodium bismuth titanate (NBT) have a much more limited range o

Background: The coronavirus disease 2019 (COVID-19) is critically affecting not only the physical health but also mental health read more globally.This study aimed to define the frequency of sleep disorders in COVID-19 positive patients in Aswan University Hospitals, Aswan Governorate, Egypt to clarify the different clinical types of them and to id