| || Synthesis of Nanocrystalline PZT by Hydrothermal Method
Author : Athawale, Anjali A.;Bapat, Malini S.
Source : Defence Science Journal ; Vol:57(1) ; 2007 ; pp 35-39
Subject : 66 Chemical Technology
Keywords : Lead zirconium titanate;Piezoelectric materials;Electrostrictive materials;Actuators;Memory alloys;PZT nanoparticles;Perovskite structure;Perovskite;Hydrothermal synthesis
Abstract : Synthesis of lead zirconium titanate by a simple, low-energy consumption hydrothermal means is being reported. The precursor materials have been chosen and the method is tailored so that the process becomes economical and offers low lead loss. The synthesised powders have been analysed by FTIR, XRD, SEM, TEM, and TGA. The results show the formation of tetragonal PZT nanoparticles with an average yield of ~75 per cent. On the basis of FTIR, the product formation is understood to proceed via the formation of a three metal cation hydroxide complex, that under hydrothermal treatment undergoes conversion directly to form the tetragonal phase of lead zirconium titanate.
| || Piezo-actuated Vibration and Flutter Control
Author : Kandagal, S. B.;Venkatraman, Kartik
Source : Defence Science Journal ; Vol:56(4) ; 2006 ; pp 615-626
Subject : 621.38 Electronics;681.2 Instrumentation
Keywords : Vibration;Flutter control;Actuators;Sensors;Smart materials;Piezoceramics;Passive damping;Magnetostrictive materials;Electro-rheological fluids;Magneto-rheological fluids;Aeromechanical systems;Electrostrictive materials;Shape memory alloys
Abstract : The potential application of smart materials is being investigated by various researchers in the perspective of building intelligent systems. A smart structure consists of distributed actuators and sensors with associated processors to analyse and control the structure. Piezoceramics, magnetostrictive materials, electro-rheological fluids, magneto-rheological fluids, shape memory alloys, fibre optics are quite often used in realising a smart/intelligent system. In this paper, vibration and flutter control using piezoceramics is reviewed. Various aspects covering relative merits of piezoceramics with other smart materials and application capabilities are discussed.