The study on the phosphate glass melted by microwave irradiation

Wang, Jenn-Shing; Jeng, Jiann-Shing; Ni, Chuen-Fa

doi:10.1016/j.jnoncrysol.2009.04.002

Cited by 15 publications

(5 citation statements)

References 19 publications

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“…The hydroxyl group was thus increased by adding water and hence existence of H 3 PO 4 in water mixtures promote microwave heating. 232 Microwave processing of hard glass-ceramic (MgO-Al 2 O 3 -TiO 2 system) coating on nickel based super alloy substrate exhibited lower surface roughness value and exhibited higher hardness ($6 GPa) compared to that of conventionally processed coating. 236 Apart from high heating rate and shorter melting times, microwave processing has the advantages of yielding good product quality.…”

Section: Glass and Mineral Processingmentioning

confidence: 99%

“…Microwave heating has found applications in glass processing such as preparation of silica glasses, phosphate glasses, 232 optical glasses, glass-ceramics 233 and glasses reinforced with metals, due to its ability to melt glasses in a short duration and due to its ability to achieve high heating rates. 234,235 Microwaves were also applied for coating glasses with metals, carbon, metal-oxides, and organic paints.…”

Section: Glass and Mineral Processingmentioning

confidence: 99%

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Microwave material processing—a review

2011

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Microwave heating is caused by the ability of the materials to absorb microwave energy and convert it to heat. This article represents a review on fundamentals of microwave heating and their interaction with materials for various applications in a comprehensive manner. Experimental studies of single, multimode, and variable frequency microwave processing were reviewed along with their applications. Modeling of microwave heating based on Lambert's law and Maxwell's electromagnetic field equations have also been reviewed along with their applications. Modeling approaches were used to predict the effect of resonances on microwave power absorption, the role of supports for microwave heating, and to determine the nonuniformity on heating rates. Various industrial applications on thermal processing have been reviewed. There is tremendous scope for theoretical and experimental studies on the athermal effects of microwaves. Some of the unresolved problems are identified and directions for further research are also suggested.

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Section: Glass and Mineral Processingmentioning

confidence: 99%

Section: Glass and Mineral Processingmentioning

confidence: 99%

Microwave material processing—a review

2011

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“…Na + ion behavior was studied in SnO·NaPO 3 glasses, which were prepared similarly . The studies on the phosphate glass melted by microwave irradiation were performed by Wang et al, using NH 4 H 2 PO 4 , Li 2 CO 3 , and Ca(OH) 2 as raw materials, mixed with and without adding water or pressing pressure. It was observed that, with the addition of water, the particles changed from irregular to aggregated; in addition, the existence of H 3 PO 4 and an increase in hydroxyl groups in moist mixtures is due to the decomposition of NH 4 H 2 PO 4 , which could promote microwave absorption.…”

Section: Phosphate Glassesmentioning

confidence: 99%

Review: The Use of Microwave Irradiation in the Processing of Glasses and Their Composites

Kharissova

Kharisov

Valdés

2010

Ind. Eng. Chem. Res.

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The use of microwave (MW) radiation in glass processing is reviewed and compared to the usual processing techniques, such as glass melting, sintering, sealing, devitrification, coating, reinforcement with various substances, deposition by layers, etc. MW heating is known as a much-faster process (requiring minutes rather than hours), yielding good product quality, in comparison with the prolonged conventional thermal treatment of glass precursors.

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“…Preparation of phosphate glass with this route has been explored using precursor like NH4H2PO4•2H2O, H3PO4, NaH2PO4•2H2O, etc. as these sources of P2O5 are good microwave absorber [9][10][11]. However, enormous amounts of evolving gas limit its uses to prepare bulk glass under closed microwave cavity.…”

Section: Introductionmentioning

confidence: 99%

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

Mandal¹,

Sen²

2015

Technologies

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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.

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The study on the phosphate glass melted by microwave irradiation

Cited by 15 publications

References 19 publications

Microwave material processing—a review

Microwave material processing—a review

Review: The Use of Microwave Irradiation in the Processing of Glasses and Their Composites

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

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