Various micro-transducers incorporating piezoelectric materials for converting energy in one form to useful energy in another form are disclosed. In one embodiment, a piezoelectric micro-transducer can be operated either as a micro-heat engine, converting thermal energy into electrical energy, or as...http://www.google.com.au/patents/US7453187?utm_source=gb-gplus-sharePatent US7453187 - Piezoelectric micro-transducers, methods of use and manufacturing methods for same
