Liquidus Temperature of Molten Cryolite-Based Aluminum Electrolyte

A system of equations of thermobarometer for magnetite-silicate melt equilibrium was obtained by method of multidimensional statistics of 93 experimental data of a magnetite solubility in basaltic melts. Equations reproduce experimental data in a wide range of basalt compositions, temperatures and pressures with small errors. Verification of thermobarometers showed the maximum error in liquidus temperature reproducing does not exceed ±7 °C. The level of cumulative magnetite appearance in the vertical structure of Tsypringa, Kivakka, Burakovsky intrusions predicted with errors from ±10 to ±50 m.

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Heat capacities and enthalpies of fusion and transformation for solvates of some salts with dimethyl sulfoxide and dimethylformamide

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19883072 ◽

1988 ◽

Vol 53 (12) ◽

pp. 3072-3079

Author(s):

Mojmír Skokánek ◽

Ivo Sláma

Keyword(s):

Heat Capacity ◽

Phase Transformation ◽

Phase Transformations ◽

Dimethyl Sulfoxide ◽

Liquidus Temperature ◽

Molar Heat Capacity ◽

Solid Phase ◽

Zinc Nitrate ◽

Heat Capacities ◽

Liquid Phases

Molar heat capacities and molar enthalpies of fusion of the solvates Zn(NO3)2 . 2·24 DMSO, Zn(NO3)2 . 8·11 DMSO, Zn(NO3)2 . 6 DMSO, NaNO3 . 2·85 DMSO, and AgNO3 . DMF, where DMSO is dimethyl sulfoxide and DMF is dimethylformamide, have been determined over the temperature range 240 to 400 K. Endothermic peaks found for the zinc nitrate solvates below the liquidus temperature have been ascribed to solid phase transformations. The molar enthalpies of the solid phase transformations are close to 5 kJ mol-1 for all zinc nitrate solvates investigated. The dependence of the molar heat capacity on the temperature outside the phase transformation region can be described by a linear equation for both the solid and liquid phases.

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Electrical Conductivity of Molten Cryolite and Potassium, Sodium, and Lithium Chlorides

Journal of The Electrochemical Society ◽

10.1149/1.2779646 ◽

1952 ◽

Vol 99 (12) ◽

pp. 527 ◽

Cited By ~ 47

Author(s):

Junius D. Edwards ◽

Cyril S. Taylor ◽

Allen S. Russell ◽

L. Frank Maranville

Keyword(s):

Electrical Conductivity ◽

Potassium Sodium ◽

Molten Cryolite

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An Evaluation of the Stability of Mould Flux Properties in the Process of Continuous Steel Casting

Archives of Metallurgy and Materials ◽

10.1515/amm-2017-0130 ◽

2017 ◽

Vol 62 (2) ◽

pp. 885-889 ◽

Cited By ~ 1

Author(s):

J. Falkus

Keyword(s):

Process Parameters ◽

Liquidus Temperature ◽

Casting Process ◽

Continuous Steel Casting ◽

Time Intervals ◽

Equal Time ◽

Industrial Experiments ◽

Mould Flux ◽

Steel Cast ◽

The Stability

AbstractThis paper presents research on the mould slag formed on the basis of two mould fluxes. In the conducted industrial experiments, slag was sampled in equal time intervals between adding subsequent portions of mould flux. The research focused on the an evaluation of the stability of slag parameters by assessing the change in its liquidus temperature. It was shown that a mould flux needs to be assessed individually taking into account the casting process parameters and the steel cast grade.

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Liquidus Temperature of Spinel Precipitating High-Level Waste Glasses

MRS Proceedings ◽

10.1557/proc-465-71 ◽

1996 ◽

Vol 465 ◽

Cited By ~ 11

Author(s):

M. Mika ◽

M. J. Schweiger ◽

J. D. Vienna ◽

P. Hrma

Keyword(s):

Mixture Models ◽

Crystalline Phase ◽

Liquidus Temperature ◽

Glass Composition ◽

High Level Waste ◽

Hanford Site ◽

High Iron ◽

Negative Effect ◽

High Level ◽

Glass Viscosity

ABSTRACTThe liquidus temperature (TL) often limits the loading of high-level waste in glass through the constraint that TL must be at least 100°C below the temperature at which the glass viscosity is 5 Pa-s. In this study, values of TL for spinel primary crystalline phase were measured as a function of glass composition. The test glasses were based on high-iron Hanford Site tank wastes. All studied glasses precipitated spinel (Ni,Fe,Mn)(Cr,Fe)2O4 as the primary crystalline phase. TL was increased by additions of Cr2O3, NiO, Al2O3, Fe2O3, MgO, and MnO; while Li2O, Na2O, B2O3, and SiO2 had a negative effect. Empirical mixture models were fitted to data.

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Mechanical Properties of CaO–Al2O3–SiO2 Glass-Ceramics Precipitating Hexagonal CaAl2Si2O8 Crystals

Crystals ◽

10.3390/cryst11040393 ◽

2021 ◽

Vol 11 (4) ◽

pp. 393

Author(s):

Kei Maeda ◽

Kosho Akatsuka ◽

Gaku Okuma ◽

Atsuo Yasumori

Keyword(s):

Fracture Toughness ◽

Liquidus Temperature ◽

Fracture Behavior ◽

Glass Ceramics ◽

High Fracture Toughness ◽

Flexural Test ◽

Toughening Mechanism ◽

High Fracture ◽

X Ray ◽

Microcrack Toughening

Fracture behavior via a flexural test for a newly found CaO–Al2O3–SiO2 (CAS) glass-ceramic (GC) was compared with that of enstatite GC and mica GC, which are well-known GCs with high-fracture toughness and machinability, respectively. By focusing on the nonelastic load–displacement curves, CAS GC was characterized as a less brittle material similar to machinable mica GC, compared with enstatite GC, which showed higher fracture toughness, KIC. The microcrack toughening mechanism in CAS GC was supported by the nondestructive observation of microcracks around the Vickers indentation using the X-ray microcomputed tomography technique. The CAS GC also showed higher transparency than mica GC due to its low crystallinity. Moreover, the precursor glass had easy formability due to its low-liquidus temperature.

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