Piezoelectric ceramics are extensively investigated materials for transducer application.The selection of optimal piezoelectric material for this particular application is a tedious task.It depends upon various physic...Piezoelectric ceramics are extensively investigated materials for transducer application.The selection of optimal piezoelectric material for this particular application is a tedious task.It depends upon various physical properties,including piezoelectric charge coefficient(d33),electromechanical coupling factor(K_(p)),dielectric constant(ε_(r)),and dielectric loss(tanδ).The classical multiple attribute decision making(MADM)can be used for decision making if these properties are known precisely.However,these properties cannot be expressed by exact numerical values,since they are dependent upon the microstructure and fabrication process.Fuzzy-based MADM approaches can be helpful in such cases.In this paper,we have determined the ranks and rank indices(for degree of closeness)of important piezoelectric materials using fuzzy VlseKriterijumska Optimisacija I Kompromisno Resenje(VIKOR)technique.PLZT(8/65/35)((Pb_(1-x)La_(x))(Zr_(y)Ti_(1-y))O_(3))and KNN-LT-LS((K_(0.44)Na_(0.52)Li_(0.04))-(Nb0_(.84)Ta_(0.10)Sb_(0.06))O_(3))consecutively are found to be the top-rank piezoelectric ceramics.This indicates that KNN-LT-LS can be used on behalf of lead-based piezo-ceramics.展开更多
This work emphasis on the competence of(100)-oriented PMN–PT buffer layered(0.68PbMg_(1/3)Nb_(2/3)O_(3)–0.32PbTiO_(3)with Pb(Zr_(0.3)Ti_(0.7))O_(3)/PbO_(x)buffer layer)and(001)-oriented PMN–PT(0.67PbMg_(1/3)Nb_(2/3...This work emphasis on the competence of(100)-oriented PMN–PT buffer layered(0.68PbMg_(1/3)Nb_(2/3)O_(3)–0.32PbTiO_(3)with Pb(Zr_(0.3)Ti_(0.7))O_(3)/PbO_(x)buffer layer)and(001)-oriented PMN–PT(0.67PbMg_(1/3)Nb_(2/3)O_(3)–0.33PbTiO_(3))for low grade thermal energy harvesting using Olsen cycle.Our analysis(based on well-reported experiments in literature)reveals that these films show colossal energy harnessing possibility.Both the films are found to have maximum harnessable energy densities(PMN–PT buffer layered:8 MJ/m^(3);PMN–PT:6.5 MJ/m^(3))in identical ambient conditions of 30–150℃and 0–600 kV/cm.This energy harnessing plausibility is found to be nearly five times higher than the previously reported values to date.展开更多
基金Rahul Vaish gratefully acknowledges financial support from Department of Science and Technology(DST),New Delhi,India under INSPIRE Faculty Award(ENG-01)-2011.
文摘Piezoelectric ceramics are extensively investigated materials for transducer application.The selection of optimal piezoelectric material for this particular application is a tedious task.It depends upon various physical properties,including piezoelectric charge coefficient(d33),electromechanical coupling factor(K_(p)),dielectric constant(ε_(r)),and dielectric loss(tanδ).The classical multiple attribute decision making(MADM)can be used for decision making if these properties are known precisely.However,these properties cannot be expressed by exact numerical values,since they are dependent upon the microstructure and fabrication process.Fuzzy-based MADM approaches can be helpful in such cases.In this paper,we have determined the ranks and rank indices(for degree of closeness)of important piezoelectric materials using fuzzy VlseKriterijumska Optimisacija I Kompromisno Resenje(VIKOR)technique.PLZT(8/65/35)((Pb_(1-x)La_(x))(Zr_(y)Ti_(1-y))O_(3))and KNN-LT-LS((K_(0.44)Na_(0.52)Li_(0.04))-(Nb0_(.84)Ta_(0.10)Sb_(0.06))O_(3))consecutively are found to be the top-rank piezoelectric ceramics.This indicates that KNN-LT-LS can be used on behalf of lead-based piezo-ceramics.
文摘This work emphasis on the competence of(100)-oriented PMN–PT buffer layered(0.68PbMg_(1/3)Nb_(2/3)O_(3)–0.32PbTiO_(3)with Pb(Zr_(0.3)Ti_(0.7))O_(3)/PbO_(x)buffer layer)and(001)-oriented PMN–PT(0.67PbMg_(1/3)Nb_(2/3)O_(3)–0.33PbTiO_(3))for low grade thermal energy harvesting using Olsen cycle.Our analysis(based on well-reported experiments in literature)reveals that these films show colossal energy harnessing possibility.Both the films are found to have maximum harnessable energy densities(PMN–PT buffer layered:8 MJ/m^(3);PMN–PT:6.5 MJ/m^(3))in identical ambient conditions of 30–150℃and 0–600 kV/cm.This energy harnessing plausibility is found to be nearly five times higher than the previously reported values to date.
