Thermal Analysis of Iron Sulfides at the Temperature Range of α-transformation

1954 ◽  
Vol 9 (4) ◽  
pp. 503-506 ◽  
Author(s):  
Tokutarō Hirone ◽  
Seijirō Maeda ◽  
Noboru Tsuya
Keyword(s):  
Thermal Analysis ◽  
Iron Sulfides ◽  
Temperature Range

Thermal Analysis of Iron Sulfides at the Temperature Range of β-transformation

1954 ◽  
Vol 9 (4) ◽  
pp. 500-502 ◽  
Author(s):  
Tokutarō Hirone ◽  
Seijirō Maeda ◽  
Shu Chiba ◽  
Noboru Tsuya
Keyword(s):  
Thermal Analysis ◽  
Iron Sulfides ◽  
Temperature Range

Thermal analysis of high-performance mortar containing burnt clay shale as a partial portland cement replacement in the temperature range up to 1000 °C

2016 ◽  
Vol 41 (1) ◽  
pp. 54-64 ◽  
Author(s):  
Anton Trník ◽  
Lenka Scheinherrová ◽  
Tereza Kulovaná ◽  
Pavel Reiterman ◽  
Eva Vejmelková ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Portland Cement ◽  
High Performance ◽  
Clay Shale ◽  
Cement Replacement ◽  
Temperature Range ◽  
Burnt Clay

APPLICATION OF DIFFERENTIAL THERMAL ANALYSIS TO THE DISSOCIATION OF MnO2 AND Mn2O3

1965 ◽  
Vol 43 (6) ◽  
pp. 1723-1728 ◽  
Author(s):  
T. Matsushima ◽  
W. J. Thoburn
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Temperature Range ◽  
Heats Of Reaction

The method of differential thermal analysis was employed to determine the oxygen pressures produced by the reactions[Formula: see text]and[Formula: see text]in the temperature range 250–1000 °C. The heats of reaction calculated from the slope of the van't Hoff curves are: ΔH835°K0 = 25.8 ± 1.5 and ΔH1200°K0 = 25.3 ± 4.2 kcal per mole of oxygen. These are in agreement with previously reported values based on equilibrium measurements, but are lower than those determined by calorimetry.

Ober Phaseniibergange von Ammonium-Alkali-Jodiden und verwandten Halogeniden / Phase Transitions of Ammonium-alkali Iodides and Related Halides

1981 ◽  
Vol 36 (3) ◽  
pp. 222-225 ◽  
Author(s):  
Peter Brauer
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Phase Transitions ◽  
Martensitic Transition ◽  
Temperature Range

The investigation of the order-disorder transitions of the ammonium-chlorides and -bromides, in which some of the NH4+ are replaced by Cs+, Rb+ or K+, is extended to the corresponding iodides using birefringence and differential thermal analysis. As the temperature range of the martensitic transition (Pm 3 m↔Fm 3 m) is now overlapping the temperature range of the orderdisorder transitions, the former must be included in the measurements. The results allowing an overlook are discussed using the work of Garland, Lushington, and Leung [5]

scholarly journals ROOT HARDINESS OF GRAPE CULTIVARS

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1136F-1136
Author(s):  
M. Ahmedullah ◽  
C. R. Rom
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Free Water ◽  
Extracellular Water ◽  
Triphenyltetrazolium Chloride ◽  
Temperature Range ◽  
Survival Test ◽  
One Year ◽  
Grape Cultivars

Roots of one year old grape cvs. Concord, White Riesling, Grenache and Semillon were frozen to 0, -5, -10, -15 and -20°C in a programmable freezer. The tops were protected from cold by insulating them. For survival test, 4 plants of each cv. were planted in the greenhouse and their growth observed. Differential thermal analysis (DTA), using a computer attached to a programmable freezer was performed on roots. To aid in the interpretation of DTA, triphenyltetrazolium chloride (TTC) was performed. Hardiness determinations were based on DTA, TTC and the survival tests. DTA patterns representing exothermic response showed an exotherm associated with extracellular free water in tissue which appeared at about the same temperature range for all cvs. This is not associated with hardiness. Additional minor exotherms related to hardiness appeared at lower temperatures than the extracellular water exotherm. Their location differed from one cv. to another. Based on these tests, Concord roots appear to be hardier than other cvs. with important but minor differences in the hardiness of other cvs.

Effect of Ammonium Halides On the Combustion of Polystyrene

1983 ◽  
Vol 1 (2) ◽  
pp. 81-95 ◽  
Author(s):  
K. Kishore ◽  
K. Mohandas
Keyword(s):  
Thermal Analysis ◽  
Weight Loss ◽  
Burning Rate ◽  
Exothermic Reactions ◽  
Temperature Range ◽  
Accelerated Degradation ◽  
Degradation Temperature ◽  
Ammonium Halides ◽  
Low Concentrations ◽  
Tg Studies

Effect of NH4Cl and NH4Br has been studied on combustion and decomposi tion of polystyrene (PS). NH4Br, at low concentrations showed unfavourable ef fects on burning rate, which is surprising for an accepted fire retardent. NH4Br accelerated degradation and combustion of PS. Thermogravimetric (TG) studies of PS + NH4Br samples in N 2 showed that these samples degraded at lower temperatures and with faster rates compared to neat PS. In O2 atmosphere the sensitization of the degradation started after about 30-40% weight loss. The dif ferential thermal analysis (DTA) of these samples gave some additional informa tion : both NH4Cl & NH4Br shifted the degradation temperature to a lower value than PS and exhibited exothermic reactions in the temperature range 400- 450 °C (more exothermicity in NH4Br samples).

Thermophysical Properties of Germanium for Thermal Analysis of Growth from the Melt

1981 ◽  
Vol 9 ◽  
Author(s):  
Roger K. Crouch ◽  
A. L. Fripp ◽  
W. J. Debnam ◽  
R. E. Taylor ◽  
H. Groot
Keyword(s):  
Thermal Conductivity ◽  
Thermal Analysis ◽  
Thermal Diffusivity ◽  
Specific Heat ◽  
Thermophysical Properties ◽  
Room Temperature ◽  
Bridgman Method ◽  
The Other ◽  
Temperature Range ◽  
Diffusivity Measurements

ABSTRACTThe thermal diffusivity of Ge has been measured over a temperature range from 300° C to 1010° C which includes values for the melt. Specific heat has been measured from room temperature to 727° C. Thermal conductivity has been calculated over the same temperature range as the diffusivity measurements. These data are reported along with the best values from the literature for the other parameters which are required to calculate the temperature and convective fields for the growth of germanium by the Bridgman method. These parameters include the specific heat, the viscosity, the emissivity, and the density as a function of temperature.

Thermal analysis of the phases of HMX using X-ray diffraction

1993 ◽  
Vol 204 (1) ◽  
Author(s):  
M. Herrmann ◽  
W. Engel ◽  
N. Eisenreich
Keyword(s):  
Thermal Analysis ◽  
Thermal Expansion ◽  
Phase Transitions ◽  
Diffraction Pattern ◽  
X Ray Diffraction ◽  
Volume Changes ◽  
X Ray ◽  
Temperature Range

AbstractThe 4 phases of HMX and its transitions were investigated using X-ray diffraction. The phases were heated stepwise in a temperature range from 170 K to 510 K, measuring a diffraction pattern after each step.The thermal expansion of the different phases and the volume changes during the phase transitions were obtained. Anomalies and strongly anisotropic expansions were observed withThe highest thermal expansion was found with

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