Effect of a BaO-CuO-Bi2O3-B2O3 glass flux, and its processing on the dielectric properties of BaTiO3

GONG, Yuxuan, DENG, Wei, ZHANG, Wei, YATONGCHAI, Chokchai, ZOU, Yongkun and BUCHANAN, Relva C. (2014). Effect of a BaO-CuO-Bi2O3-B2O3 glass flux, and its processing on the dielectric properties of BaTiO3. Ceramics International, 41 (1), 671-680.

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Abstract

A seriesofBaTiO3 along withvarious flux oxideshasbeensinteredstep-wiselytoyieldalowsinteringtemperature flux glasscomposition. The developedglass flux (Ba-Cu-Bi-Bsystem)wasaddedtoBaTiO3 with differentamount,andeventuallyyieldedalowsinteringtemperatureof BaTiO3 at 900 1C with7wt% flux glassaddition.Toinvestigatetheinfluence ofprocessingmethods,a flux glassshell-BaTiO3 core structure was developedbyusingseparateballmillingscheduleofglassandbariumtitanatepowders.Comparisonofresultantdielectricpropertieswas made amongdifferentprocessingmethods,andthis flux shellprocessingmethodsnotablymodifies thedielectricpropertiesofsinteredsamples comparing toconventionalprocessingmethods.Thesubsequentstructuralinformation,morphology,andphasestabilityofsinteredsampleswere investigated byInfraredspectroscopy,X-rayphotoelectronspectroscopy(XPS),scanningelectronmicroscopy(SEM)andX-raydiffraction (XRD) respectively.93wt%BaTiO3-7 wt%glasswiththe flux shellstructuredisplayedaninhibitedcubicphasegraingrowth,andareduced tetragonality associatedwithCudopingwasconfirmed byX-raydiffraction.Ahighdielectricconstant(43000) aswellasalowlossyfactor (o0.03) ofthisparticularseriesofsamplewasreported.X-rayphotoelectronspectroscopyshowedthatbridgingoxygenspeciesdecreaseswith increasing Ndaddition,indicatingthattheNdbondstotheglassnetworkasanetworkmodifier insteadofbeingdopedintoBaTiO3 lattice through the flux shell.Thus,weconcludedthattheglass flux shellplaystheroleofsinteringadditive,Cudopingion(containedinglass)carrier, and Ndaliendopantblock.

Item Type:	Article
Research Institute, Centre or Group - Does NOT include content added after October 2018:	Materials and Engineering Research Institute
Identification Number:	https://doi.org/10.1016/j.ceramint.2014.08.121
Page Range:	671-680
Depositing User:	Carmel House
Date Deposited:	06 Jan 2017 12:48
Last Modified:	18 Mar 2021 22:15
URI:	https://shura.shu.ac.uk/id/eprint/14571

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