Contribution of irreversible non-180° domain to performance for multiphase coexisted potassium sodium niobate ceramics.

Thus, for the ceramics with R–O–T phase boundary, the f can be modified as follows 34 : 8 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$f={F}_{{{{{\rm{R}}}}}}\times {f}_{{{{{\rm{R}}}}}}+{F}_{{{{{\rm{O}}}}}}\times {f}_{{{{{\rm{O}}}}}}+{F}_{{{{{\rm{T}}}}}}\times {f}_{{{{{\rm{T}}}}}}$$\end{document} f = F R × f R + F O × f O + F T × f T For the virgin state, the f shows a decreasing trend from 50.5% to 39.2% with increasing Sb 5+ content (Fig. 3b ).

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