Investigation of Barium Hexaferrite BaFe12O19 Electro Physical Parameters Using Open-Ended Coaxial Probe Method

2017 ◽  
Vol 265 ◽  
pp. 834-838 ◽  
Author(s):  
K.M. Zeyde ◽  
S.A. Gudkova ◽  
D.A. Vinnik
Keyword(s):  
Single Crystals ◽  
Metal Powder ◽  
Barium Hexaferrite ◽  
Causal Models ◽  
Physical Parameters ◽  
Powder Materials ◽  
Barium Borate ◽  
Specific Behavior ◽  
Target Value ◽  
Coaxial Probe

Barium hexaferrite BaFe12O19 single crystals hexagonal shaped and sizes of up to 5 mm were grown from barium borate flux. The electro physical parameters of grinded crystals were investigated following the open-ended methodology, using Speag DAK system. Thebtained Debye characteristic for permittivity confirmed the theoretical expectations. The presented results show the specific behavior of the target value in terms of causal models for metal powder materials.

MICROWAVE SINTERING OF METAL POWDER MATERIALS (Review)

Metallurg ◽  
2021 ◽  
pp. 82-91
Author(s):  
R.V. Batienkov ◽  
A.N. Bol’shakova ◽  
A.A. Khudnev
Keyword(s):  
Metal Powder ◽  
Microwave Sintering ◽  
Powder Materials

Modeling the Production Technology of Fully-Pressed Bi-Metal Powder Materials and Products

2021 ◽  
Vol 316 ◽  
pp. 570-575
Author(s):  
Badrudin G. Gasanov ◽  
Abakar B. Gasanov ◽  
Artem A. Aganov
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Bulk Density ◽  
Size Distribution ◽  
Metal Powder ◽  
Production Technology ◽  
Powder Mixture ◽  
Geometric Parameters ◽  
Powder Materials ◽  
Loading Devices

The features of calculating the thickness of the layers of bimetallic powder products without holes and the type of bushings are shown. The effect of the particle size distribution of the powders, the kinematic and geometric parameters of the loading devices and molds on the mechanism of the expiration of the powder mixture and on the thickness of the layers of the molded product is studied. A technique has been developed for determining the dimensions of the feeder cassette and tooling, depending on the overall dimensions and thicknesses of the working layers, in the production of whole-pressed bimetallic products on press machines with a vertical arrangement of layers. It was found that the thickness of each layer of bimetallic products depends on the geometric parameters of the feeder cassette and tooling, bulk density, particle size distribution and other characteristics of the powders, as well as on the speed of lowering the lower punch ν1 .

scholarly journals Physical Evolution of Solutions in Response to the Contact of Water with Beans: Case Study of Soaking and Boiling

2021 ◽  
pp. 76-95
Author(s):  
J. C. Fopoussi Tuebue ◽  
I. N. Tchinda
Keyword(s):  
Human Urine ◽  
Infiltration Rate ◽  
Physical Parameters ◽  
Phaseolus Vulgaris L ◽  
Specific Behavior ◽  
Cooking Process ◽  
Infiltration Tests ◽  
Present Case Study ◽  
Shed Light

The present paper aims to highlight the physical evolution of solutions from soaking and beans cooking process. This is motivated by the desire to shed light on the particular behavior of the bean end-of-cooking solutions when they are incorporated into the soil. For that purpose, solutions from soaking were produced by putting in contact 2kg of sorted and quickly washed beans seed with 8kg of water with known physical characteristics. Concerning the solutions from cooked beans, they were produced by putting on fire the pot containing the mixture of the water from soaking and bean seeds. The beans were a variety of Phaseolus vulgaris L.,known as “Meringue”. The cooking process was done without salts. The samples of solutions were collected as follow: 30 and 60 minutes respectively after the beginning of the soaking, 30, 60, and 90 minutes after the beginning of the cooking process of the beans soaked during 60 minutes. After each sampling, the equal volume of the solution collected was replaced with the water used for the cooking process. The color of the water used for the cooking process is translucent. Concerning solutions from soaking, their coloration are gradually reddish. Solutions from soaking and cooking process became abruptly dark red. From 60 minutes of the cooking process after soaking, the dark red coloration turn to strong brown. The solution handled in the case of the present study, from soaking and cooking the beans are gradually enriched in flakes compared to the situation noticed in the water used for the cooking process. But, the enrichment becomes abruptly high with the beginning of the cooking process after the process of soaking. In terms of consequence, their physical parameters studied in the present case study all increase in the same manner, notably the mass, the volumetric mass, and the density of the different solutions. The infiltration tests made including the water used for the different processes, solutions form the end of cooking the beans, and human urine show that the infiltration rate of the water from cooked beans is very low compared to that of the water used for the processes and human urine. The total infiltration of solution of the end of cooking the bean reveals on the infiltration surface the presence of a film of a matter bearing molds, generated by the progressive settling of this solution. The correlations established between the different parameters followed up here are highly positive. But in detail, the influence of an under laid parameter, known here as temperature, has been identified as being the responsible of the questioned behavior of the parameters taken in pairs in the case of correlation studies made. Finally, from this work, it emerges that the specific behavior of the bean end-of-cooking solution when it is introduced into the soil is justified by its progressive enrichment in organic matter during the cooking process.

scholarly journals Statistical Analysis of Results Obtained in the Hardening Surface of the Metal Powder Materials with Optical Radiation Impulses

2015 ◽  
Vol 20 (2) ◽  
pp. 79-85
Author(s):  
Ioan Virca
Keyword(s):  
Statistical Analysis ◽  
Metal Powder ◽  
Voltage Pulse ◽  
Optical Radiation ◽  
Experimental Program ◽  
Energy Sources ◽  
Powder Materials ◽  
Metal Powders ◽  
Analysis Of Results

Abstract The paper presents how is processed the data resulted from application of pulsed optical superficial treatments on surfaces of materials made of metal powders. The parameters of the electrotechnological regime work are variable in the experimental program, namely the distance between the axis focal energy sources and surfaces play, the number of energy pulses applied to the voltage pulse of optical radiation, which causes a statistical analysis more complex, after which it will precise drawing lessons that will lead to a calculation microhardness model in the superificial layer of material.

scholarly journals Tribological Properties of Coatings Obtained with Electrocontact Welding of Metal Powder Materials

2020 ◽  
Vol 42 (2) ◽  
pp. 191-199
Author(s):  
R. Saifullin ◽  
L. Islamov ◽  
Yu. Kuznetsov ◽  
A. Kolomeichenko ◽  
R. Solovyev ◽  
...  
Keyword(s):  
Metal Powder ◽  
Tribological Properties ◽  
Powder Materials ◽  
Properties Of Coatings

Growth of Lead and Aluminum Substituted Barium Hexaferrite Single Crystals from Lead Oxide Flux

2016 ◽  
Vol 843 ◽  
pp. 3-9 ◽  
Author(s):  
D.A. Vinnik ◽  
S.A. Gudkova ◽  
R. Niewa
Keyword(s):  
Single Crystals ◽  
Lead Oxide ◽  
Barium Hexaferrite ◽  
Cell Parameters ◽  
Al Content ◽  
Substitution Level ◽  
Bulk Single Crystals ◽  
First Time ◽  
Oxide Flux ◽  
Substituted Barium Hexaferrite

Lead and aluminum substituted barium hexaferrite (Ba,Pb)Fe12–хAlхO19 single crystals were grown from lead oxide flux at 1260 °C as hexagonal plates with sizes of about 2 mm. A maximum substitution level of x = 4.82 was achieved for the first time for bulk single crystals. The variation of the unit cell parameters with Al content is in good agreement with literature data on exclusively Al substituted barium hexaferrite, while the substitution of Ba by Pb has hardly any influence. Similarly, Pb has only a negligible influence on the magnetic properties, while Al substitution significantly reduces the saturation magnetization in a very similar manner as known from Pb-free barium hexaferrite.

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