The physical and electrical properties of lanthanum doped Pb(Zr,Ti)O_3 ceramic sheets(PLZT)which were prepared by tape casting method were carried out.Tape casting of lanthanum modified PZT was performed using commerc...The physical and electrical properties of lanthanum doped Pb(Zr,Ti)O_3 ceramic sheets(PLZT)which were prepared by tape casting method were carried out.Tape casting of lanthanum modified PZT was performed using commercial cellulose acetate binders and poly(ethylene glycol)plasticizers in ethanol solvent.Tapes from these slips were casted on a polymer substrate.The PLZT green tapes were stacked for 5 units and sintered in air at 1050℃ for 1 h with heating rate 5℃/min.SEM micrographs show that the tape is dense(90.26% of theoretical density)and rather uniform with grain size of approximately 1.1 ?m.The dielectric permittivity and loss tangent of PLZT ceramics as a function of temperature at 1 kHz suggest that the compounds exhibit a phase transition of diffuse type.The transition temperature(T_m)and piezoelectric coefficient(d_ 33)were 110℃ and 117 pC/N,respectively.展开更多
In this research,the ultrasonic ball milling technique has been used to fabricate lead zirconate titanate(PZT)ceramics.PZT with the composition nearly the morphotropic phase boundary(MPB):Pb(Zr_ 0.52Ti_ 0.48)O_3 was s...In this research,the ultrasonic ball milling technique has been used to fabricate lead zirconate titanate(PZT)ceramics.PZT with the composition nearly the morphotropic phase boundary(MPB):Pb(Zr_ 0.52Ti_ 0.48)O_3 was studied.The effect of milling time on phase formation of sample powder was examined by X-ray diffraction technique(XRD).Moreover,the physical,dielectric,piezoelectric properties and microstructure of PZT ceramics were investigated.The present results reveal that the ultrasonic ball milling technique results the homogeneous and small size of PZT powder.Furthermore,there is a significantly change occurs in the size of the particles with the short time of milling process.展开更多
文摘The physical and electrical properties of lanthanum doped Pb(Zr,Ti)O_3 ceramic sheets(PLZT)which were prepared by tape casting method were carried out.Tape casting of lanthanum modified PZT was performed using commercial cellulose acetate binders and poly(ethylene glycol)plasticizers in ethanol solvent.Tapes from these slips were casted on a polymer substrate.The PLZT green tapes were stacked for 5 units and sintered in air at 1050℃ for 1 h with heating rate 5℃/min.SEM micrographs show that the tape is dense(90.26% of theoretical density)and rather uniform with grain size of approximately 1.1 ?m.The dielectric permittivity and loss tangent of PLZT ceramics as a function of temperature at 1 kHz suggest that the compounds exhibit a phase transition of diffuse type.The transition temperature(T_m)and piezoelectric coefficient(d_ 33)were 110℃ and 117 pC/N,respectively.
文摘In this research,the ultrasonic ball milling technique has been used to fabricate lead zirconate titanate(PZT)ceramics.PZT with the composition nearly the morphotropic phase boundary(MPB):Pb(Zr_ 0.52Ti_ 0.48)O_3 was studied.The effect of milling time on phase formation of sample powder was examined by X-ray diffraction technique(XRD).Moreover,the physical,dielectric,piezoelectric properties and microstructure of PZT ceramics were investigated.The present results reveal that the ultrasonic ball milling technique results the homogeneous and small size of PZT powder.Furthermore,there is a significantly change occurs in the size of the particles with the short time of milling process.
