New ceramics and composites drive sonar developments
Armament Research & Development Establishment (ARDE) based in Pune has developed Lead-magnesium-niobate-lead-titanate (PMN-PT) Electro ceramics for actuator and sensor applications. PMN-PT are promising materials with properties-relative permittivity @ 18000, dielectric loss @ 0.04 and strain 0.1% at room temperature was developed using coulumbite precursor to get desired properties. It has been successfully developed and aimed at use by NPOL in sonar development project.
ARDE has also developed Porous Piezo-composites for sensors and hydrophones. Porous Piezo-composites are useful for hydrophone applications, non volatile memory elements, piezoelectric detectors and sonar’s due to low acoustic impedance, high figure of merit, hydrostatic coefficientsmand hydrostatic sensitivity. These composites have been developed using BURPS process. NPOL, NSTL, BEL and Keltron are likely to be major users.
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