ChemInform Abstract: KINETICS OF STRENGTHENING OF THERMALLY SHOCKED MAGNESIUM OXIDE AND ALUMINUM OXIDE

1977 ◽  
Vol 8 (2) ◽  
pp. no-no
Author(s):  
T. K. GUPTA
Keyword(s):  
Aluminum Oxide ◽  
Magnesium Oxide ◽  
Kinetics Of

scholarly journals The study of the possibility of using domestic burnt magnesia in oil and petrol resistant rubber

2019 ◽  
Vol 59 (7) ◽  
pp. 63-68
Author(s):  
Nikolay F. Ushmarin ◽  
◽  
Evgeny N. Egorov ◽  
Nikolay I. Kol'tsov ◽  
◽  
...  
Keyword(s):  
Magnesium Oxide ◽  
Residual Deformation ◽  
Rubber Matrix ◽  
Standard Samples ◽  
Start Time ◽  
Technical Grade ◽  
Rubber Mixture ◽  
Roll Mill ◽  
Resistant Rubber ◽  
Kinetics Of

The article examines the oil-and-petrol resistant rubber mixture of type 7NO-68-1SK based on the combination of BNKS-18AMN grade butadiene-caoutchouc with polychloroprene caoutchouc of brand neoprene W. The effect of replacing imported burnt magnesia brand Remag AC on domestic burnt magnesia technical grade B on the properties of the rubber compound and vulcanizate was studied. The rubber mixture was prepared on a laboratory roll mill LB 320 160/160, and then its standard samples were vulcanized at 150 °C for 30 minutes in a two-story electrically heated press of the VP 400-2E brand. To establish the plasto-elastic properties of rubber mixture on the Mooney viscometer, MV 3000 was determined: the start time of the vulcanization, the time to reach the vulcanization mode, the initial maximum viscosity. To assess the kinetics of vulcanization of the rubber mixture on the rheometer MDR 3000 was determined: the start time of vulcanization, the time to reach the optimum vulcanization, the maximum torque. To assess the physicomechanical properties of rubber, the following were determined: conditional tensile strength; elongation at break; hardness; tear resistance and relative residual deformation under compression in accordance with the standards in force in the rubber industry. To assess the performance properties of rubber, changes in its mass were determined after aging in a mixture of isooctane + toluene, as well as standard liquid SJR–1. It has been shown that the introduction of burnt magnesia technical grade B into the rubber mixture does not lead to technological complications, magnesia is well distributed in the rubber matrix, and the magnesia agglomerates were not found on the rubber mixture sections. Replacement magnesium oxide m. Remag AC on burnt magnesia technical grade B has an impact on the plasto-elastic and rheometric properties of the rubber mixture. However of physicomechanical and operational properties vulcanizates of rubber mixture containing magnesium oxide m. Remag AC and burnt magnesiatechnical grade B, have almost the same values.

scholarly journals Corrosion Behaviour of Passive Layer Growth by Controlling Additives of Nano-Metals-Phosphate to Pure Aluminum

2020 ◽  
Vol 13 (4) ◽  
pp. 1-9
Author(s):  
Hussein A. Hussein ◽  
Mohammed J. Kahdim ◽  
Alaa Abdulhasan Atiyah
Keyword(s):  
Aluminum Oxide ◽  
Corrosion Behaviour ◽  
Pure Aluminum ◽  
Xrd Analysis ◽  
Passive Layer ◽  
Layer Growth ◽  
Metal Phosphate ◽  
Cyclic Polarization ◽  
Cast Sample ◽  
Kinetics Of

This study investigates how microstructure and chemistry effects by Nano-Metal-Phosphate and the kinetics of growth passive layer and passivity breakdown. Additionally, the passive layer germination behavior on aluminum alloy 1050 with anticorrosive properties. The passive layer is an alloying method which allows an aluminum oxide to germinate. Morphologically and structurally, the aluminum oxide films were characterized using microscopy analyzes and XRD analysis. Results indicated that the reinforcements are well distributed and the grin size is downy. Corrosion behavior tested by Cyclic polarization exam and done at room temperature in (3.5 per cent NaCl) solution. The reinforcement increased the hardness for processed aluminum from Hv81.1 to HV=120.492 as castings. The parameter Nano-Metal-Phosphate has attenuated the current density of corrosion (7.15μA / cm2) compared to the as-cast sample results.

Kinetics of radiative recombination in magnesium oxide

1979 ◽  
Vol 20 (4) ◽  
pp. 1687-1699 ◽  
Author(s):  
R. T. Williams ◽  
J. W. Williams ◽  
Thomas J. Turner ◽  
K. H. Lee
Keyword(s):  
Magnesium Oxide ◽  
Radiative Recombination ◽  
Kinetics Of

scholarly journals Intrinsic kinetic study of 1-butene isomerization over magnesium oxide catalyst via a Berty stationary catalyst basket reactor

RSC Advances ◽  
2020 ◽  
Vol 10 (60) ◽  
pp. 36667-36677
Author(s):  
Khunnawat Ountaksinkul ◽  
Sippakorn Wannakao ◽  
Piyasan Praserthdam ◽  
Suttichai Assabumrungrat
Keyword(s):  
Magnesium Oxide ◽  
Oxide Catalyst ◽  
Internal Mass ◽  
Intrinsic Kinetics ◽  
Recycle Reactor ◽  
Mass Transfers ◽  
Intrinsic Kinetic ◽  
Kinetics Of ◽  
Stationary Catalyst ◽  
Butene Isomerization

The intrinsic kinetics of 1-butene isomerization over a commercial MgO catalyst was studied by using a Berty-type reactor (gradient-less recycle reactor) without limitations of heat-, external mass-, and internal mass-transfers.

Kinetics of Hydrous Aluminum Oxide Conversion in Mixtures of Amorphous Alumina Gels of Various Acid Reactivities

1970 ◽  
Vol 59 (3) ◽  
pp. 376-379 ◽  
Author(s):  
Stanley L. Hem ◽  
Emanuel J. Russo ◽  
Richard J. Harwood ◽  
Behram H. Tejani ◽  
Surendra M. Bahal ◽  
...  
Keyword(s):  
Aluminum Oxide ◽  
Alumina Gels ◽  
Amorphous Alumina ◽  
Kinetics Of ◽  
Oxide Conversion
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