National University of Singapore

Microfine Materials Technologies Pte Ltd.

Leong Chew Lim

John Wang

Junmin Xue

Yuexue Xia

Dian-Hua Lin

Leong Ming Gan

Ser Choon Ng

Yu Huang

Cost effective connectors of high bending stiffness for making high-performance piezoelectric actuators and derivative devices are disclosed. In one embodiment, the connector has circumferentially alternating recesses of circular cross-section which can be cost-effectively machined out with conventional machining techniques. The circular recesses can be adopted to house circular or non-circular cross-sectioned piezoelectric active elements to make cost effective 2-level (2&#xd7;) piezoelectric displacement actuators. In another embodiment, the non-circular cross-sectioned recesses in the connector include suitable wall openings to enable said recesses to be machined out cost effectively via conventional machining techniques, or via reduced use of non-conventional machining techniques. Additional stiffening mechanisms can be added to minimize the bending displacement of the base of recesses when desired. Cost effective derivative devices, such as high-performance multi-level displacement actuators and compact Langevin low-frequency underwater projectors, can be made from such connectors.

Cost-effective high-bending-stiffness connector and piezoelectric actuator made of such

A method for producing electroceramic materials of high sintered density from hydroxide and/or oxalate precursors is disclosed. In this method the precursor(s) are compacted to form a preform, thermally treated, recompacted and then sintered to form finished products.

Method for producing sintered electroceramic materials from hydroxide and oxalate precursors

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Singapore, Singapore

Leong Chew Lim