A new group of lead free piezoelectric perovskite solid solutions, (1-x)Bi(B'B")O₃-xABO₃, were obtained via solid-state processing techniques. The solubility of unstable perovskite Bi(B'B")O₃ compounds into stable perovskite compounds was found to be related to the tolerance factor of the ABO₃ perovskite endmembers. The morphotropic phase boundary (MBP) in perovskite solid...
What students need most from instructors’ written response on their texts is commentary that evokes a sense of exchange. Teachers often believe that their job is to point out the deficits in a student’s paper and help eliminate those deficits. While this is a part of the function of response,...