High Polymer Tungsten Trioxide Preparation

Preparation of High Polymer Tungsten Trioxide
Preparing various samples at different sintering temperatures after the samples were prepared, than measuring different sets of samples according to voltammetry, impedance spectroscopy and dielectric spectroscopy curves. We can obtain micron tungsten trioxide nonlinear coefficient polymer composite samples by calculating the nonlinear coefficients of main sample by measured data. In the composite sample, the tungsten trioxide particles in the sample content has higher nonlinear coefficients, and the nonlinear coefficient of the sintered samples 250 ℃ sintering temperature is higher than the other samples, up to 98. When the organic matter content is higher than 80%, the sample becomes an insulator, the prepared tungsten trioxide polymer material is more stable.

Sample Analysis
The experimental methods commonly based on varistor methods, and calculating barrier trends, comparing barrier with nonlinear coefficient, typical sample made six-phase morphology and structural analysis, and comparing good and bad samples nonlinear function of the body as well as micro particles and nanoparticles composite sample, which shows the trends of barrier are consistent  with nonlinear coefficients.

Test results of morphology and electrical properties show that high resistance nonlinear crystal polymer material with an applied electric field tungsten trioxide samples resulting shift toward low-resistance crystalline phase, and it has a close relationship. The result of nonlinear preferred groups of typical sample with impedance spectroscopy show bias under the grain boundary resistance is not changed significantly Resistance is low because of its low resistance phase structure mainly monoclinic.
 

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