【摘要】 固相法制备Pb0.955Pr0.03(ZryTi1-y)O3(PPZT1)和Pb1-1.5xPrx(Zr0.54Ti0.46)O3(PPZT2)系压电陶瓷,其中:x=0.02,0.04,0.06,0.08;y=0.51,0.52,0.54,0.56,0.58,0.60。XRD分析表明:PPZT1系统的准同型相界在锆的摩尔分数为55％左右。当锆的摩尔分数为54％,烧结温度为1 240℃,保温1 h,能获得优良的性能,其值分别为:d33=420×10-12C/N;ε33T/ε0=2 000;θc=314℃;Qm=76;tanδ=2％;Kp=0.53。XRD分析还表明:PPZT2系统已远离相界,组成均在四方铁电相内。尽管PPZT2系统的介电常数很高,其压电性能却低于PPZT1系统。更多还原

【Abstract】 Pb0.955Pr0.03(ZryTi1-y)O3(PPZT1)and Pb1-15xPrx(Zr0.54Ti0.46)O(PPZT2)piezoelectric ceramics were prepared by solid-state reaction method with the following formulas:x=0.02,0.04,0.06,0.08, ;y = 0.51, 0.52, 0.54, 0.56, 0.58, 0.60. XRD results show that the morphotropic phase boundary (MPB) of PPZT1 is located in the area where the molar fraction of Zr is near 55% . When the molar fraction of Zr is 54% and the sintering temperature is 1 240℃ with 1 h curing time, the excellent properties are obtained as the following:d33=420×10-12 C/N;εT33/ε0=2000;θC=314℃;Qm=76; tanδ= 2% ;Kp=0.53.XRD results also reveal that PPZT2 is far from MPB and the compositions of PPZT2 are all in tetragonal phase. So that is why PPZT2 has a lower piezoelectric property despite of a good dielectric constant compared with PPZT1更多还原