EFFECT OFTiO2ON STRUCTURE AND DIELECTRIC PROPERTIES OFRO-Al2O3-B2O3-SiO2(R=Ca,Mg)GLASSES

Xuehong Zhang, Zhao Du, Haitao Wu () and Yunlong Yue
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Xuehong Zhang: School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
Zhao Du: School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
Haitao Wu: School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
Yunlong Yue: School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China

Surface Review and Letters (SRL), 2013, vol. 20, issue 03n04, 1-5

Abstract: RO-Al2O3-B2O3-SiO2(R=Ca,Mg)glasses containing different concentrations ofTiO2(ranging from 0 to 9 mol.%) were prepared by conventional melting method. WhenTiO2was present in lower concentrations (≤ 6 mol.%), Fourier-transform infrared spectroscopy (FTIR) indicated that titanium ions took part in network forming positions. However, for further increase in the concentration ofTiO2(> 6 mol.%), FTIR data indicated the formation ofTiO4tetrahedrons andTiO6octahedrons. The glass transition temperatures(Tg)were determined using a differential scanning calorimetry (DSC). TheTgvariation with the concentration ofTiO2showed an increasing trend up to 6 mol.% ofTiO2and beyond this concentration,Tgwas found to decrease. The dielectric constantεrand loss tan δ continued to decrease with the concentration ofTiO2up to 6 mol.% and beyond thatεrand tan δ were found to increase. This behavior was mainly explained in terms of the rigidity of glass network.

Keywords: Aluminoborosilicate glasses; TiO2; dielectric properties; glass transition temperatures (search for similar items in EconPapers)
Date: 2013
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DOI: 10.1142/S0218625X13500303

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