【正文】 By using ceramic injection molding to fabricate posite preforms, and then laying up the preforms to form larger posite arrays, an approach has been demonstrated for netshape manufacturing of piezoelectric posite transducers in large quantities. Acknowledgements This work was funded by the Office of NavalResearch under the direction of Mr. Stephen E. Newfield. The authors wish to thank Ms. Hong Pham for technical assistance, and Dr. Thomas Shrout of the Materials Research Laboratory, Penn. State Universityfor electrical measurementsReferences[l] R. E. Newnham et al, Composite Piezoelectric Transducers, Materials in Engineering, Vol. 2, pp. 93106, Dec. 1980.[2] C. Nakaya et al, IEEE Ultrasonics Symposium Proc., Oct. 1618, 1985, p 634. [3] S. D. Darrah et al, Large Area Piezoelectric Composites, Proc. of the ADPA Conference on Active Materials and Structures, Alexandria, Virginia, Nov. 48, 1991, Ed. G. Knowles, Institute of Physics Publishing, pp 139142. [4] A. Safari and D. J. Waller, Fine Scale PZT Fiber/Polymer Composites, presented at the ADPA Conference on Active Materials and Structures, Alexandria, Virginia, , 1991.[5] U. Bast, D. Cramer and A. Wolff, A New Technique for the Production of Piezoelectric Composites with 13 Connectivity, Proc. of the 7th CIMTEC, Montecatini, Italy, June 2430, 1990, Ed. P. Vincenzini, Elsevier, pp 2005201 5.[6] G. Bandyopadhyay and K. W. French, Fabrication of Nearnet Shape Silicon Nitride Parts for Engine Application, J. Eng. for Gas Turbines And Power, 108, J. Greim et al, Injection Molded Sintered Turbocharger Rotors, Proc. 3rd. Int. Symp. Heat Engines, Las Vegas, Nev., pp. 1365 1375, Amer. Cer. Soc. 1989. pp 536539, 1986.[7] J. Greim et al, Injection Molded Sintered Turbocharger Rotors, Proc. 3rd. Int. Symp. on Ceramic Materials and Components for Heat Engines, Las Vegas, Nev., pp. 1365 1375, Amer. Cer. Soc. 1989。 flexibility with respect to transducer design (allows variation in PZT element spacing and shape)。[5] U. Bast, D. Cramer and A. Wolff著，《一種用來制造13連通形壓電復(fù)合材料的新方法》，第七屆CIMTEC ， 意大利蒙特卡蒂尼， 6月24至30號(hào)， 1990年，. Vincenzini, Elsevier，20052015頁[6] G. Bandyopadhyay and K. W. French著，《網(wǎng)狀的硅的氮化物應(yīng)用于發(fā)動(dòng)機(jī)的制造》，對(duì)渦輪增壓器轉(zhuǎn)自及動(dòng)力，108，536539頁，1986年出版[7] J. Greim等著，《燒結(jié)注塑渦輪增壓轉(zhuǎn)子》，第三屆關(guān)于熱動(dòng)力的陶瓷材料及構(gòu)造國際研討，內(nèi)華達(dá)州拉斯維加斯，13651375頁，Amer. Cer. Soc，1989年附件2：外文原文FABRICATION OF PIEZOELECTRIC CERAMlClPOLYMER COMPOSITES BY INJECTION MOLDING.Leslie J. Bowen and Kenneth W. French,Materials Systems Inc.53 Hillcrest Road, Concord, MA 01742AbstractResearch at the Materials Research Laboratory, Pennsylvania State University has demonstrated the potential for improving hydrophone performance using piezoelectric ceramic/polymer posites. As part of an ONRfunded initiative to develop costeffective manufacturing technology for these posites, Materials Systems is pursuing an injection molding ceramic fabrication approach. This paper briefly overviews key features of the ceramic injection molding process, then describes the approach and methodology being used to fabricate PZT ceramic/polymer posites. Properties and applications of injection molded PZT ceramics are pared with conventionally processed material.IntroductionPiezoelectric ceramic/polymer posites offer design versatility and performance advantages over both single phase ceramic and polymer piezoelectric materials in both sensing and actuating applications. These posites have found use