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Technologies 2015, 3(2), 111-125; doi:10.3390/technologies3020111

Microwave Absorption of Barium Borosilicate, Zinc Borate, Fe-Doped Alumino-Phosphate Glasses and Its Raw Materials

Glass Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India
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Author to whom correspondence should be addressed.
Academic Editors: Manoj Gupta and Luciano Feo
Received: 24 December 2014 / Revised: 22 April 2015 / Accepted: 8 May 2015 / Published: 19 May 2015
(This article belongs to the Special Issue Microwave Energy Applications)
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Abstract

This study presents microwave absorption of raw materials used in barium borosilicate, Fe-doped alumina phosphate and zinc borate glass. Microwave absorption was investigated for the raw materials SiO2, Na2CO3, BaCO3, BPO4, Al(PO3)3, Mg(PO3)2, Al(OH)3, TiO2. The study shows that SiO2 could be heated directly above 1000 °C within 30 min at 1.5 kW microwave output (MW) power and 0.8 kW MW power is necessary to initiate heating (from 260 °C). Microwave heating of material with low dielectric loss has been investigated by increasing MW power. Microwave absorption of above glass systems has also been investigated. Dielectric properties such as loss tangent of glass as a function of temperature are presented. Glass melting under direct microwave heating was demonstrated for the studied glass systems. Temperature-Microwave power-Time (T-P-t) profiles for the three glasses indicate maximum MW output power ~1 kW, 0.65 kW and ~1 kW for barium borosilicate, zinc borate glass and alumino-phosphate glass for 60 g glass melting. View Full-Text
Keywords: microwave absorption; loss tangent; zinc borate glass; barium borosilicate; alumino-phosphate glass microwave absorption; loss tangent; zinc borate glass; barium borosilicate; alumino-phosphate glass
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Mandal, A.K.; Sen, R. Microwave Absorption of Barium Borosilicate, Zinc Borate, Fe-Doped Alumino-Phosphate Glasses and Its Raw Materials. Technologies 2015, 3, 111-125.

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