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Bismuth titanate nanoparticles dispersed polyacrylates

Published online by Cambridge University Press:  03 March 2011

Wei-Fang Su ,
Jiann-Fong Lee ,
Ming-Yao Chen  and
Ron-Ming Ho
Wei-Fang Su*
Affiliation:
Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan
Jiann-Fong Lee
Affiliation:
Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan
Ming-Yao Chen
Affiliation:
Department of Physics, National Taiwan University, Taipei, Taiwan
Ron-Ming Ho
Affiliation:
Department of Chemical Engineering, National Tsing Hua Univeristy, Hsinchu, Taiwan
*
a)Address all correspondence to this author. e-mail: suwf@ntu.edu.tw
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Abstract

We successfully dispersed amorphous bismuth titanate nanoparticles (<50 nm)in situ in poly-hydroxy ethyl methacrylate via a sol-gel process. Since less than 20% of the polymer composition is bismuth titanate by weight, the material exhibits high refractive indices (>1.6) and good optical transparency (>90% transmittance from 530 to 800 nm). Furthermore, this highly cross-linked material has an improved thermal stability and a lower coefficient of thermal expansion than that of neat polymers. The material also displays a high dielectric constant (>10) without ferroelectricity. Thus the material has potential applications in optical lenses, optical waveguides, and capacitors.

Keywords

Sol-gelNanoparticleDielectric properties
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 8 , August 2004 , pp. 2343 - 2348
Copyright
Copyright © Materials Research Society 2004

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References

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