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Development of PZT Smart Materials, Devices and Polymer & Ceramic Nanofibers at CSIR-NAL

 P.K.Panda
 Chief Scientist
 Materials Science Division,
 CSIR-National Aerospace Laboratories,
 Bangalore-560017,
 E-mail: pkpanda@nal.res.in
 
Date and Venue Information:
6 November 2015, Room No. 2105, Academic Block II

Title of Lecture:
"Development of PZT Smart Materials, Devices and Polymer & Ceramic Nanofibers at CSIR-NAL"

Abstract

Piezoelectric materials belong to a class of “smart materials” capable of performing both “sensing” and “actuation” functions. These materials produce electric charges on application of mechanical stress (as sensor) or undergo dimensional change when subjected to an electric field (as actuator). Lead Zirconate Titanate (PZT) is widely used piezo ceramics frequently used as sensors and actuators for various applications e.g. vibration control of aerospace structures, development of smart aeroplane wings / morphing structures, fuel flow control in automobile engines, energy harvesting etc. At CSIR-NAL, PZT powders of high piezoelectric charge constant (d33=590-610 pC/N) were prepared by wet-chemical route in lab scale as well as in relatively large scale (10kg/batch). Multi-layered PZT actuators of displacement (up to 173mm) and block force (5200N) were fabricated by tape-casting technique. The fabricated actuators are found suitable for vibration control applications. Currently, R&D on vibration energy harvesting study has been pursued. Similarly, a range of polymer and ceramic nanofibers such as poly vinyl alcohol (PVA), polyacrylonitrile (PAN), polystyrene, polyvinyl pyrollidone alumina, barium titanate, samaria etc were prepared by electrospinning technique.