Structural and Microwave Properties of Silica Xero

Authors: H Aripin S Mitsudo E S Prima I N Sudiana S Tani K Sako Y Fujii T Saito T Idehara S Sano B Sunendar S Sabchevski

Publish Date: 2012/07/07

Volume: 33, Issue: 11, Pages: 1149-1162

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Abstract

In this paper we present and discuss experimental results from a microwave sintering of silica glassceramics produced from amorphous silica xerogel extracted from sago waste ash As a radiation source for a microwave heating a submillimeter wave gyrotron Gyrotron FU CW I with an output frequency of 300 GHz has been used The powders of the amorphous silica xerogel have been dry pressed and then sintered at temperatures ranging from 300 °C to 1200 °C Microwave absorbing properties of the sintered samples were investigated by measuring the dielectric constant the dielectric loss and the reflection loss at different frequencies in the interval from 82 to 124 GHz Furthermore the characteristics of the formation process for producing silica glassceramics were studied using a Raman Spectroscopy and a Scanning Electron Microscopy SEM The results indicate that the samples sintered at 1200 °C are characterized by lower reflection losses and a better transparency due to the formation of a fully crystallized silica glass ceramic at sufficiently high temperatureThis work has been partially supported by the Directorate Research and Community Service Directorate of Higher Education at the Department of Education and Culture Republic of Indonesia under Project of International Research Collaboration and Scientific Publication Number 1140/D3/PL/2011 and the Research Center for Development of FarInfrared Region FIR FU Center University of Fukui Japan

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