THE SYSTEM BACO3 + SRCO3 - CRYSTAL PHASE-TRANSITIONS - DTA MEASUREMENTS AND THERMODYNAMIC PHASE-DIAGRAM ANALYSIS

被引：5

作者：

ERNE, BH ^{[1
]}

VANDERWEIJDEN, AJ ^{[1
]}

VANDEREERDEN, AM ^{[1
]}

JANSEN, JBH ^{[1
]}

VANMILTENBURG, JC ^{[1
]}

OONK, HAJ ^{[1
]}

机构：

[1] UNIV UTRECHT,INST EARTH SCI,DEPT GEOCHEM,3584 CD UTRECHT,NETHERLANDS

来源：

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY | 1992年 / 16卷 / 01期

关键词：

D O I：

10.1016/0364-5916(92)90039-Z

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Onset temperatures for the endothermic crystal phase transitions of nine Ba1-xSrxCO3 mixed crystals were measured with DTA in 1 atm CO2. Comparison of signal shapes with calculated phase diagrams indicates that the onset temperatures are the temperatures at which diffusionless transition takes place. On that assumption, transitional excess Gibbs energies of x(1-x)[-5160 +/- 200] J.mol-1 for the orthorhombic-rhombohedral transition and x(1-x)[0 +/- 200] J.mol-1 for the rhombohedral-cubic transition were calculated.

引用

页码：63 / 72

页数：10

共 20 条

[1] BARIUM OXIDE-CARBON DIOXIDE SYSTEM IN PRESSURE RANGE 0.01-450 ATMOSPHERES [J].

BAKER, EH .

JOURNAL OF THE CHEMICAL SOCIETY, 1964, (FEB) :699-&

[2]

BAKER EH, 1962, CHEM SOC LONDON, V2, P2525

[3]

BALDASARI A, 1979, AM MINERAL, V64, P742

[4]

Barin I., 1989, THERMOCHEMICAL DATA, Vthird

[5]

BOUWSTRA JA, 1979, LIQFIT COMPUTER PROG

[6]

Chang L. L. Y., 1965, J GEOL, V73, P346, DOI [10.1086/627065, DOI 10.1086/627065]

[7] FROM SIGNAL TO PHENOMENA - A PRACTICAL WAY TO DETERMINE BINARY PHASE-DIAGRAM BY THERMAL-ANALYSIS [J].

COURCHINOUX, R ;

CHANH, NB ;

HAGET, Y ;

CALVET, T ;

ESTOP, E ;

CUEVASDIARTE, MA .

JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE, 1989, 86 (03) :561-593

[8] USE OF THE SHAPE FACTORS AS AN EMPIRICAL-METHOD TO DETERMINE THE ACTUAL CHARACTERISTIC TEMPERATURES OF BINARY PHASE-DIAGRAMS BY DIFFERENTIAL SCANNING CALORIMETRY [J].

COURCHINOUX, R ;

CHANH, NB ;

HAGET, Y ;

TAULER, E ;

CUEVASDIARTE, MA .

THERMOCHIMICA ACTA, 1988, 128 :45-53

[9]

DEVILLIERS JP, 1971, AM MINERAL, V56, P758

[10]

JUDD MD, 1971, J APPL CHEM BIOTECHN, V21, P285

← 1 2 →