Title :
Effect of electric field on properties of 0-3 fine composites with PbTiO3 ultrafine powders
Author :
Xi Yao ; Liangying, Zhang ; Qifa, Zhou ; Zhongyang, Cheng
Author_Institution :
Electron. Mater. Res. Lab., Xi´´an Jiaotong Univ., China
Abstract :
PbTiO3 (PT) polar ultrafine powders derived from the sol-gel process were dispersed in liquid and epoxy matrices. The change of scattered light, transmitted light, optical absorption, and refractive index by these PT ultrafine powders dispersed in liquid and epoxy matrices was investigated in detail. The field-induced light scattering is about 50%, while transmitted light can be increased by 100% with increase of external field applied on the PT suspension. The optical absorption edge is shifted from 2.95 eV to 2.76 eV in fine PT composites. The change of refractive index is about 10-4 in order of PT suspension. All experimental results indicate that there is a strong interaction between PT particles and dispersed systems under external AC and DC electric field. All optical properties can be modified by applying an electric field on composites
Keywords :
composite insulating materials; electrets; lead compounds; powders; refractive index; sol-gel processing; suspensions; visible spectra of inorganic solids; PbTiO3; composites; electrets; epoxy matrices; external field; liquid matrices; optical absorption; polar ultrafine powders; refractive index; scattered light; sol-gel process; suspension; transmitted light; Absorption; Composite materials; Light scattering; Nanostructured materials; Optical materials; Optical refraction; Optical scattering; Particle scattering; Powders; Solids;
Conference_Titel :
Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)
Conference_Location :
Berlin
Print_ISBN :
0-7803-0112-9
DOI :
10.1109/ISE.1991.167329
