Comparative investigations on dielectric, piezoelectric properties and humidity resistance of PZT–SKN and PZT–SNN ceramics

Abstract

Sodium was used to substituted for potassium in Pb(Zr 0.53 ,Ti 0.47 )O 3 -Sr(K 0.25 ,Nb 0.75 )O 3 (PZT-SKN) based on the lead-free (Na 0.5 K 0.5 )NbO 3 (KNN) piezoelectric ceramic and a new ceramic material Pb(Zr 0.53 ,Ti 0.47 ) O 3 -Sr(Na 0.25 ,Nb 0.75 )O 3 (PZT-SNN) was developed in order to improve the humidity resistance. PZT-SKN and PZT-SNN ceramics have been fabricated by the conventional solid-state reaction method at the sintering temperature of 1,150-1,225°C for 2 h. The effects of SKN and SNN on the microstructure, piezoelectric properties and humidity resistance of the prepared ceramics have been systematically investigated and compared. The phase structures of the two ceramics are both tetragonal. With increasing of SKN/SNN, both the grain size and Curie temperature decrease. Among all compositions studied, the 0.99PZT-0.01SKN and 0.98PZT-0.02SNN sintered at 1,175°C exhibited optimal comprehensive properties. Especially, the PZT-SNN has a higher humidity resistance than PZT-SKN. The optimal values of d 33 , kp, e r and Tc for 0.98PZT-0.02SNN is 448pC/N, 0.63, 2,126.32 and 354°C, respectively.

A PLZT Novel Sensor with Pt Implanted for Biomedical Application: Cardiac Micropulses Detection on Human Skin

“…Nowadays several researches are in search of better materials and manufacturing processes for the development of piezoelectric materials considering lead-zirconate-titanate relationship (PZT). In this sense, systems such as PZT-SKN and PZT-SNN have been studied to find excellent dielectric, piezoelectric, and moisture resistance properties [2]. Another ferroelectric material investigated is a quaternary system based on lead lanthanum zirconate titanate known as PLZT [3,4], where the effects of sintering temperature on the electrical properties are reported elsewhere, considering the manufacturing process by mechanical alloying technique.…”

Electrical Conductivity and Modulus Studies of x [CNFO]-(1-x) [0.5BCT-0.5BZT] Multiferroic with Dielectric, Magnetic and Magneto-dielectric Properties

“…Recently, the piezoelectric coefficient of 448 pC/N, єr-2126 and Tc~354 ℃ was reported for PZT-Sr(Na0.25Nb0.75)O3 (PZT-SNN) composite. [18] But due to their toxic nature there is a need of an alternative for PZT based materials like BaTiO3, BiNaTiO3, KNaNbO3, BaZrTiO3 (BZT), BaCaTiO3 (BCT) and solid solution of BCT-BZT is increasing for ferroelectric phase. [19,20] Shi.…”

High Frequency Needle Ultrasonic Transducers Based on Lead-Free Co Doped Na0.5Bi4.5Ti4O15 Piezo-Ceramics

“…The improvement of on-focus lateral resolution is due to the small ƒ-number, defined as the ratio of the focal distance to the spatial dimension of the transducer, of the tightly focused transducer and the wavelength. As the key component of ultrasonic transducers, piezoelectric materials such as zinc oxide (ZnO) and aluminum nitride (AlN) piezoelectric films [5,6], lead oxide based ferroelectrics, especially the lead zirconate titanate (PZT) system, lead niobiumzine zirconate titanate (PMN-PT) crystal [7,8,9], lithium niobate (LiNbO 3 ) single crystal, [4] and lead-free piezoelectric ceramics [10,11,12] have been investigated extensively. Among them, due to their environmental friendliness, simple preparation methods, and relatively low cost, lead-free piezoelectric ceramics have attracted significant interest.…”