Calculation of the thermodynamic properties of the Ga Sb Ti liquid alloys

Calculation of the thermodynamic properties of the Ga Sb Ti liquid alloys合金热力学计算

J.Serb.Chem.Soc.70(1)9–20(2005)

JSCS–3243UDC546.681'.683':86–034:536.7.001.2OriginalscientificpaperCalculationofthethermodynamicpropertiesoftheGa–Sb–Tlliquidalloys

DRAGANMANASIJEVI]*1,DRAGANA IVKOVI]1,IWAOKATAYAMA2and IVAN

IVKOVI]1

1TechnicalFaculty,UniversityofBelgrade,VJ12,19210Bor,SerbiaandMontenegro

(e-mail:dmanasijevic@tf.bor.ac.yu)and2OsakaUniversity,GraduateSchoolofEngineering,Department

ofMaterialsScienceandProcessing,2-1Yamadaoka,Suita,Osaka565-0871,Japan

(Received21April,revised27May2004)

Abstract:Theresultsofthecalculationofthethermodynamicpropertiesforliquid

Ga–Sb–Tlalloysatthetemperature1073Karepresentedinthispaper.Initially,the

mostappropriatethermodynamicmodelfortheinvestigatedsystemwasselected.

Basedonacomparisonofthevaluescalculatedbydifferentgeometricmodels

(Kohler,Muggianu,Toop,Hillert,Chou)withtheexistingexperimentalbaseddata,

asymmetricmodelsofcalculationweredeterminedtogivethebestresults.The

asymmetricnatureoftheinvestigatedternarysystemwasadditionallyconfirmedby

theChousimilaritycoefficientconcept.Forthesereasons,furthercompletethermo-

dynamiccalculationswereperformedaccordingtotheHillertmodelinfivesections

oftheternaryGa–Sb–Tlsystemfromeachcornerwiththemoleratioofothertwo

componentsbeing9:1;7:3;5:5;3:7and1:9.Theobtainedresultsincludeintegral

excessGibbsenergydependencesoncompositionforalltheinvestigatedsections.

Thecalculatedactivityvaluesat1073Kforallcomponentsaregivenintheformof

parisonbetweenthecalculatedandexperimentallyob-

tainedgalliumactivitiesshowsgoodagreement.

Keywords:thermodynamicsofalloys,Ga–Sb–Tlsystem,geometricmodels,inte-

gralexcessGibbsenergy,activities.

INTRODUCTION

TheGa–Sbbinarysystemisasubsystemofvariouscomplexelectronicmate-rials.Forthisreason,manythermodynamicstudieshavebeencarriedoutonalloysystemscontainingtheGaSbsemiconductingcompound.ThepresentstudywasperformedinordertocreateasetofthermodynamicdataforliquidGa–Sb–Tlter-naryalloyswhichmaybeofuseforfurtherassessmentofthissystemandtoinves-tigatethemutualagreementamongtheresultsobtainedbysomeofthemostfre-quentlyusedmethodsforthepredictionofthermodynamicpropertiesofternarysystemsbasedontheknowndatafortheconstitutivebinaries.

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