Three aspects of oxide dielectrics are covered (i) structure engineering: making use of crystal structure and crystal chemistry, the dielectric behaviour can be finely tuned, as illustrated in the systems (Ba, Pb) (Ti, Zr)O3 and (Ba, Pb) (Ti, Nb)O3 studied by Biswas. (ii) Defect structure: control of defect structure of Mn-doped BaTiO3 inhibits the reduction of BaTiO3 in reducing atmospheres at high temperatures thus making the use of base metal electrodes possible in manufacturing ceramic capacitors. (iii) Composites: Diphasic composites of oxide dielectrics with other materials may be utilized for producing voltage stable capacitors and dense or flexible piezoelectrics with outstanding properties.
Volume 42 | Issue 6
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