Piezoelectric properties of 0.5 (PbNi 1/3 Nb 2/3) O 3–0.5 Pb (Zr 0.32 Ti 0.68) O 3 ceramics prepared by solid state reaction and mechanochemical activation-assisted method (original) (raw)
Related papers
2004
The sintering behavior and piezoelectric properties of the lead zirconate titanate (Pb(Zr , Ti)O 3 , PZT)-lead zinc niobate (Pb(Zn 1/3 Nb 2/3 )O 3 , PZN) system were investigated. The sintering temperature required for full densification of the PZT-PZN system was significantly lowered when the proportion of PZN was increased. The density of the specimen composed of 60% PZT and 40% PZN (0.6PZT-0.4PZN, Pb((Zr 0.47 Ti 0.53 ) 0.6 -(Zn 1/3 Nb 2/3 ) 0.4 )O 3 ) sintered at 880°C for 4 h was 8.15 g/cm 3 , which was >97% of the theoretical value. This improved densification behavior was attributed to the combined effects of the high sinterability of PZN and the stability of the PZT perovskite structure. The piezoelectric and dielectric properties of the 0.6PZT-0.4PZN specimen sintered at 880°C were comparable with those of a specimen with the same composition sintered at 1200°C for 2 h. The piezoelectric coefficient (d 33 ) and the electromechanical coupling factor (k p ) of the 0.6PZT-0.4PZN specimen sintered at 880°C were 460 pC/N and 0.6, respectively.
Effects of ZnO on the piezoelectric properties of Pb(Mn1/3Sb2/3)O3-Pb(Zr,Ti)O3 ceramics
Journal of Electroceramics, 2007
Perovskite-types 0.05Pb(Mn 1/3 Sb 2/3)O 2-0.95Pb-(Zr 0.5 Ti 0.5)O 3 (PMS-PZT) was synthesized by conventional bulk ceramic processing technique. ZnO as a dopant up to 0.5 mol% was incorporated into the PMS-PZT system, and the effects on piezoelectric properties were investigated. Pyrochlore phase was not detected to form during the synthesis of the PMS-PZT system with 0-0.5 mol% ZnO addition. The highest density of 7.92 g/cm 3 was obtained when sintered at 1200 • C for 2 h. Piezoelectric properties as a function of ZnO content were evaluated using a gain phase analyzer. Piezoelectric charge constant (d 31) and piezoelectric voltage output coefficient (g 31) increased up to −130 pC/N and −24.9 × 10 3 Vm/N, respectively, with increasing ZnO content. Mechanical quality factor (Q m) was shown to reduce considerably with increasing ZnO content. When 0.3 mol% of ZnO was added into the system, electromechanical coupling factor (k p) and relative dielectric constant (ε T 33 /ε o) reached to the maximum of 56% and 1727, respectively.
Effect of Zr/Ti ratio on piezoelectric properties of Pb(Ni 1/3 Sb 2/3 )O 3 –Pb(ZrTi)O 3 ceramics
Piezoceramic compositions [Pb(Ni 1/3 Sb 2/3 )] 0.02 -[Pb(Zr 1Ày Ti y )] 0.98 O 3 with y = 0.46-0.50 were synthesized by solid state route to study the effect of Zr/Ti ratio on crystal structure, microstructure, piezoelectric and dielectric properties. Calcination was performed at 1060 8C. The specimens were sintered at 1280 8C for 1 h. X-ray diffraction studies indicate the co-existence of tetragonal and rhombohedral perovskite phases in these compositions. Microstructural analysis showed the dense and uniform microstructure for [Pb(Ni 1/3 Sb 2/3 )] 0.02 -[Pb(Zr 0.52 Ti 0.48 )] 0.98 O 3 . This composition was resulted in optimum values of properties viz. charge constant (d 33 = 301 Â 10 À12 C/N), voltage constant (g 33 = 33.7 Â 10 À3 V m/ N), product of piezoelectric charge constant and voltage constant (d 33 Â g 33 = 10.12 Â 10 À12 C V m/N 2 ) and coupling factor (k p = 0.63). Results indicated that this material composition could be suitable for power harvesting and sensor applications. #
Journal of Electroceramics, 2004
In this paper, piezoelectric and dielectric properties of 0.9PbZr x Ti 1−x O 3 -0.1PbNi 1/3 Sb 1/3 Nb 1/3 O 3 were studied as a function of Zr/Ti mole ratio(x) for application to piezoelectric actuator. Also, microstructure and crystalline phase are investigated by using SEM and XRD, respectively. As a results, the substitution of Sb5+ to Bsite increases the piezoelectric and dielectric properties, and when Zr/Ti mole ratio is 49/51 and ternary mole ration is 0.1(0.9PbZr 0.49 Ti 0.51 O 3 -0.1PbNi 1/3 Sb 1/3 Nb 1/3 O 3 ), the corresponding composition were found belonging to the Morphotropic Phase Boundary region with electromechanical coupling coefficient(k p ), mechanical quality factor (Q m ), permittivity(ε r ) and piezoelectric strain constant(d 33 ) equaled to 63%, 360, 2000 and 470 pC/N, respectively. Sintering temperature was about 1150 • C and Curie temperature was determined around 290 • C.
Current Applied Physics, 2006
Solid solutions of the perovskite structure, (1 À x)Pb(Zr 1/2 Ti 1/2 )O 3 -xPb(Zn 1/3 Nb 2/3 )O 3 with x = 0.1-0.5, were synthesized via the columbite-(wolframite) precursor method. The phase development of calcined powder precursors was analyzed by X-ray diffraction. Phasepure perovskite of PZN-PZT ceramics was obtained over a wide compositional range. The microstructure and piezoelectric properties were characterrized by means of scanning electron microscopy (SEM), d 33 measurements and impedance analysis. It has been found that ultra-high piezoelectric properties were observed in compositions close to a morphotropic phase boundary (MPB). The maximum value of d 33 (690 pC/N) and the highest k p (0.7) were recorded for the composition x = 0.3 located at the boundary between tetragonal and rhombohedral ferroelectric phases. Furthermore, large values of d 33 (600 pC/N) and k p (0.67) were observed at a compositions of x = 0.5, which is the boundary between two ferroelectric rhombohedral phases.
Journal of Materials Science, 2007
Pb(Ni,Nb)O 3-Pb(Zr,Ti)O 3 of perovskite structure has been successfully prepared by mechanically activating mixed oxides of PbO, NiO, Nb 2 O 5 , ZrO 2 and TiO 2. This novel technique skips calcination steps at an intermediate temperature, which is otherwise required in both the conventional solid state reaction and chemical routes. Ceramics prepared by this process exhibits high diffusivity and sinterability. The measured density of the sintered pellets was found to be within 97-98% of their theoretical value. The room temperature dielectric constant (e¢) of 4,500 and a loss (tand) of~0.025 were measured on these samples. The high value of planar coupling factor, k p = 66% and charge coefficient, d 33 = 660pC/N were obtained for the ceramic specimen sintered at 1,150°C. The maximum strain realized by the present system was~0.3%.
Scientific Bulletin of Valahia University - Materials and Mechanics
0.88Pb(Zr0.52Ti0.48)O3 – 0.12Pb(Mn1/3Sb2/3)O3 – 0,02 at%E piezoelectric ceramics, with E = Pr3+ were synthesized by using a conventional method, namely a solid state reaction technique. X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) were employed for the structural and microstructural investigations. Piezoelectric methods were used for the dielectric and piezoelectric properties determination. The results of XRD show a perovskite structure and XRD patterns, indexing on a tetragonal cell structure, was carried out for the most common phases. The SEM micrographs of the sintered compositions reveal a homogenous structure with a sharp or rounded grain boundary. The modified PZT ceramic presents still superior piezoelectric properties. Based on the results obtained, one can conclude that the analysed piezoelectric ceramics are useful for device applications.
Microstructure, Ferroelectric and Piezoelectric Properties of PZT-PMnSbN Ceramics
International Journal of Materials and Chemistry, 2013
In this paper, in order to achieve a type of material with mixing "soft" and "hard" properties for piezoelectric transformer applications, polycrystalline ceramics of PbZrO 3-PbTiO 3-Pb[(Mn 1/3 Nb 2/3) x (Sb 1/2 Nb 1/2) 1-x ]O 3 (PZT-PMnSbN), x = 0.4; 0.5; 0.6; 0.7; 0.8; 0.9; 1.0, having a rho mbohedral perovskite structure have been synthesized by the Co lu mbite precursor method. Scanning electron micrograph (SEM) shows the compactness of the sample and the average grain size was found about ~ 1.89 µm. The electro mechanical coupling factor (k p), p iezoelectric constant (d 31), mechanical quality factor (Q m) of PZT-PMnSbN composition ceramics with x = 0.7 showed the optimal value of 0.6, 180 pC/ N, and 1895, respectively, and spontaneous polarization P r ≈ 49.2µC/cm 2 were observed at room temperature. These values indicated that the newly developed composition may be suitable for piezoelectric t ransformer applications.
Sensors and Actuators A-physical, 2007
In this study, in order to develop the composition ceramics for multilayer ceramic for ultrasonic nozzle and ultrasonic actuator application, Pb(Mn 1/3 Sb 2/3 )O 3 (abbreviated as PMS) substituted Pb(Ni 1/3 Nb 2/3 )O 3 -Pb(Zr,Ti)O 3 (abbreviated as PNN-PZT) ceramics were fabricated using two-stage calcinations method and Li 2 CO 3 , Na 2 CO 3 and ZnO as sintering aids, and their piezoelectric and dielectric characteristics were investigated. With the increase of the amount of PMS substitution, electromechanical coupling factor (k p ), and mechanical quality factor (Q m ) of specimens showed the maximum value at 3 mol% substituted specimen while dielectric constant (ɛ r ) was decreased. At the sintering temperature of 900°C, the density, ɛ r , k p , and Q m of 3 mol% PMS substituted PNN-PZT composition ceramics showed the optimal values of 7.92 [g/cm 3 ], 959, 0.584, and 1003, respectively, for low loss multilayer piezoelectric actuator application.