Excess Oxygen in 12CaO·7Al2O3Studied by Thermogravimetric Analysis

2005 ◽  
Vol 34 (4) ◽  
pp. 586-587 ◽  
Author(s):  
Katsuro Hayashi ◽  
Masahiro Hirano ◽  
Hideo Hosono
Keyword(s):  
Thermogravimetric Analysis ◽  
Excess Oxygen

Composition of Superconducting La2CuO4+δ a Superconductor Doped by excess Oxygen Defects

1989 ◽  
Vol 156 ◽  
Author(s):  
B. Dabrowski ◽  
D. G. Hinks ◽  
J. D. Jorgensen ◽  
D. R. Richards
Keyword(s):  
Thermogravimetric Analysis ◽  
Metal Ion ◽  
Neutron Powder Diffraction ◽  
Excess Oxygen ◽  
Rich Phase ◽  
Resistivity Measurements ◽  
Oxygen Defects ◽  
Ion Substitution ◽  
Occurrence Of Superconductivity ◽  
Semiconducting Behavior

ABSTRACTWe have studied mixed-phase samples of bulk LazCuO4 using neutron powder diffraction, thermogravimetric analysis and resistivity measurements. Samples fired at 950°C and slowly cooled form in the K2NiF4 structure with CuO impurities for z<2 and La2O3 impurities for z>2. Neither La-vacancies nor stacking defects were found. The bulk resistivity of the samples show semiconducting behavior which is shorted at 38K by small amounts of superconducting material. The superconductivity is due to the presence of an oxygen-rich phase with stoichiometry La2CuO4.08. The occurrence of superconductivity in pure La2CuO4.08 with the same Tc as observed in the doped La1.85 Sr0.15CuO4 indicates that the excess oxygen provides the same level of doping as metal-ion substitution.

Purity Evaluation of Single-Walled Carbon Nanotubes Using Thermogravimetric Analysis

2013 ◽  
Vol 51 (2) ◽  
pp. 137-144
Author(s):  
Naesung Lee ◽  
Jeung Choon Goak ◽  
Tae Yang Kim ◽  
Jongwan Jung ◽  
Young-Soo Seo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermogravimetric Analysis ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Purity Evaluation ◽  
Walled Carbon Nanotubes

Niobium Oxide as Catalyst for the Pyrolysis of Polypropylene and Polyethylene Plastic Waste

2016 ◽  
Vol 10 (4) ◽  
pp. 465-472 ◽  
Author(s):  
Debora Almeida ◽  
◽  
Maria de Fatima Marques ◽  
Keyword(s):  
Thermogravimetric Analysis ◽  
Niobium Oxide ◽  
Plastic Waste

In the present work, the pyrolysis of polypropylene and polyethylene was evaluated with and without the addition of niobium oxide as catalyst by means of thermogravimetric analysis and experiments in a glass reactor. The results revealed that niobium oxide performed well in the pyrolysis of both polypropylene and polyethylene separately. For the mixture of polypropylene with polyethylene, the catalyst reduced the pyrolysis time.

Thermal Stability of N-Heterocycle-Stabilized Iodanes – A Systematic Investigation

2019 ◽  
Author(s):  
Andreas Boelke ◽  
Yulia A. Vlasenko ◽  
Mekhman S. Yusubov ◽  
Boris Nachtsheim ◽  
Pavel Postnikov
Keyword(s):  
Thermal Stability ◽  
Differential Scanning Calorimetry ◽  
Thermogravimetric Analysis ◽  
Systematic Investigation ◽  
Scanning Calorimetry ◽  
Thermal Stability Of

<p>The thermal stability of pseudocyclic and cyclic <i>N</i>-heterocycle-stabilized (hydroxy)aryl- and mesityl(aryl)-l<sup>3</sup>-iodanes (NHIs) through thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) is investigated. NHIs bearing <i>N</i>-heterocycles with a high N/C-ratio such as triazoles show among the lowest descomposition temperatures and the highest decomposition energies. A comparison of NHIs with known (pseudo)cyclic benziodoxolones is made and we further correlated their thermal stability with reactivity in a model oxygenation. </p>

OXY-FUEL COMBUSTION OF CRUDE GLYCEROL USING THERMOGRAVIMETRIC ANALYSIS

2019 ◽  
Author(s):  
Diogo Nunes ◽  
Gretta Larisa Aurora Arce Ferrufino ◽  
Ivonete Ávila
Keyword(s):  
Thermogravimetric Analysis ◽  
Crude Glycerol ◽  
Fuel Combustion

Characterization of Different Types of Biomass Wastes Using Thermogravimetric and ICP-MS Analyses

2020 ◽  
Vol 70 (12) ◽  
pp. 4594-4600
Keyword(s):  
Thermogravimetric Analysis ◽  
Food Industry ◽  
Wood Waste ◽  
Biomass Ash ◽  
Minor Elements ◽  
Ms Analysis ◽  
Icp Ms ◽  
Different Types

The purpose of this study was to characterize some types of biomass wastes resulted from different activities such as: agriculture, forestry and food industry using thermogravimetric and ICP-MS analyses. Also, it was optimized an ICP-MS method for the determination of As, Cd and Pb from biomass ash samples. The ICP-MS analysis revealed that the highest concentration of metals (As, Cd, Pb) was recorded in the wood waste ash sample, also the thermogravimetric analysis indicated that the highest amount of ash was obtained for the same sample (26.82%). The biomass wastes mentioned in this study are alternative recyclable materials, reusable as pellets and briquettes. Keywords: ash, biomass, ICP-MS, minor elements, TG

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