Evaluation Of The Kinetics Of Crystallization in Aluminum Fluoride Glass Using Isothermal DSC Method

2010 ◽  
Author(s):  
Ahmad Marzuki ◽  
Khairurrijal ◽  
Mikrajuddin Abdullah ◽  
Wahyu Srigutomo ◽  
Sparisoma Viridi ◽  
...  
Keyword(s):  
Fluoride Glass ◽  
Aluminum Fluoride ◽  
Kinetics Of Crystallization ◽  
Dsc Method ◽  
Kinetics Of

Thermal Decomposition of Li(NTO)·2H2O and Na(NTO)·H2O (NTO = Anion of 3-Nitro-1,2,4-triazol-5-one): Kinetics Derived from T-jump/FTIR Spectroscopy

2006 ◽  
Vol 71 (1) ◽  
pp. 129-137 ◽  
Author(s):  
Yuanhua Sun ◽  
Tonglai Zhang ◽  
Jianguo Zhang ◽  
Xiaojing Qiao ◽  
Li Yang ◽  
...  
Keyword(s):  
Ftir Spectroscopy ◽  
Energetic Material ◽  
Burning Surface ◽  
High Sensitivity ◽  
Control Voltage ◽  
Differential Scanning Colorimetry ◽  
Voltage Trace ◽  
Dsc Method ◽  
Phase Chemistry ◽  
Kinetics Of

A "snapshot" simulation of the surface reaction zone is captured by a thin film of material heated rapidly to temperatures characteristic of the burning surface by using the T-jump/FTIR spectroscopy. The time-to-exotherm (tx) kinetics method derived from the control voltage trace of the Pt filament can be introduced to resolve the kinetics of an energetic material owing to its high sensitivity to the thermochemical reactions. The kinetic parameters of the two title compounds are determined under different pressures. The results show that Li(NTO)·2H2O and Na(NTO)·H2O (NTO = anion of 3-nitro-1,2,4-triazol-5-one) exhibit weak pressure dependence, their decomposition is dominated by the condensed phase chemistry irrespective of the pressure in the 0.1-1.1 MPa range. The values of Ea determined here are smaller than those given by a traditional non-isothermal differential scanning colorimetry (DSC) method, which might be resembled as the surface of explosion more closely and enabled the pyrolysis surface to be incorporated into models of steady and possibly unsteady combustion. The kinetics can also be successfully used to understand the behavior of the energetic material in practical combustion problems.

Reordering and Crystallization of Silicon Carbide Amorphized by Neutron Irradiation

2000 ◽  
Vol 650 ◽  
Author(s):  
Lance L. Snead ◽  
Martin Balden
Keyword(s):  
Thin Film ◽  
Silicon Carbide ◽  
Crystallization Kinetics ◽  
Neutron Irradiation ◽  
Onset Temperature ◽  
Kinetics Of Crystallization ◽  
Crystallization Onset Temperature ◽  
Crystallization Onset ◽  
Kinetics Of

ABSTRACTDensification and crystallization kinetics of bulk SiC amorphized by neutron irradiation is studied. The temperature of crystallization onset of this highly pure, fully amorphous bulk SiC was found to be between 875-885°C and crystallization is nearly complete by 950°C. In-situ TEM imaging confirms the onset of crystallization, though thin-film effects apparently alter the kinetics of crystallization above this temperature. It requires >1125°C for complete crystallization of the TEM foil. Annealing at temperatures between the irradiation and crystallization onset temperature is seen to cause significant densification attributed to a relaxation, or reordering, of the as-amorphized structure.

Concurrent kinetics of crystallization and toughening in multicomponent biomedical SiO2-Li2O-P2O5-ZrO2 glass-ceramics

2021 ◽  
Vol 554 ◽  
pp. 120607
Author(s):  
Julia Lubauer ◽  
Renan Belli ◽  
Anselm Petschelt ◽  
Maria Rita Cicconi ◽  
Katrin Hurle ◽  
...  
Keyword(s):  
Glass Ceramics ◽  
Kinetics Of Crystallization ◽  
Kinetics Of

Morphology and kinetics of crystallization of oligoamidophosphates

1980 ◽  
Vol 17 (1) ◽  
pp. 25-38 ◽  
Author(s):  
L. Mladenov ◽  
T. Vladkova ◽  
S. Fakirov
Keyword(s):  
Kinetics Of Crystallization ◽  
Kinetics Of

Kinetics of crystallization in a shearing colloidal suspension

1995 ◽  
Vol 52 (6) ◽  
pp. 6424-6430 ◽  
Author(s):  
Scott Butler ◽  
Peter Harrowell
Keyword(s):  
Colloidal Suspension ◽  
Kinetics Of Crystallization ◽  
Kinetics Of
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