Chemical processing of new piezoelectric materials

Katalin Sinkó; Kornél Fél; János RohonczyNicola Hüsing

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Chemical processing of new piezoelectric materials

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Low-density piezoelectric aluminosilicate aerogels were prepared bysol-gel technology. In order to reinforce the fragile aluminosilicate aerogels,the inorganic component was mixed with organic polymers (polyacrylic acid,polyvinyl acetate and polydimethylsiloxane) prior to gelation. The strength ofthe composite gels increases by a factor of two or three. The piezoelectricityof the composite gels changes variously depending on the kind and content ofthe organic polymers. The aerogel containing polyvinyl acetate shows negligiblepiezoelectricity. The use of polydimethylsiloxane decreases the piezoelectricityby 50 and polyacrylic acid increases it by 100. The chemical structures ofthe composite gels were investigated by means of27Al and29Si magicangle spinning nuclear magnetic resonance, infrared spectroscopy and small anglex-ray scattering. The structure and the Al incorporation have strong effects onthe piezoelectricity. The higher the amounts of bonded Al atoms in the silicanetwork the higher the intensity of the piezoelectricity is.

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《smart materials and structures》 |2001年第5期|1078-1084|共页
作者
Katalin Sinkó; Kornél Fél; János RohonczyNicola Hüsing;
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作者单位

L. Eötvös University, Department of Inorganic AnalyticalChemistry, H-1117 Budapest, Hungary;

L. Eötvös University, Department of General Inorganic Chemistry,H-1117 Budapest, Hungary;

Vienna University of Technology, Institute of Inorganic Chemistry,A-1060 Vienna, Austria;

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Chemical processing of new piezoelectric materials

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