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Year 2002 No 2

Tomášek K.
INFLUENCE OF MAGNESIUM OXIDE ON PHYSICAL PROPERTIES OF FAYALITIC AND CALCIUMFERRITIC SLAG MELTS
Keywords: slag|melt|density|surface tension|structure|magnesium oxide|
No 2 (2002), p. 93-99
  mag01.pdf (97 kB)
mag01_eng.txt (2 kB)  

Kvačkaj T.
RESEARCH OF BH-EFFECT IN STEEL SHEET FOR AUTOMOBILE INDUSTRY
Keywords: bake hardening|work hardening|auto body steel sheet|mechanical properties|plastical properties|cold rolling|annealing|
No 2 (2002), p. 100-108
  mag02.pdf (109 kB)
mag02_eng.txt (1 kB)  

Pešek L., Olejníčková L., Jonšta Z.
ULTRASONIC METHOD FOR MEASUREMENT OF YOUNG´S MODULUS ON TOOL CERAMICS
Keywords: Ultrasonic Contact Impedance|UCI|Young's modulus|modulus of elasticity|hardness|tool ceramics|silicon nitride|Si3N4|testing method|
No 2 (2002), p. 109-116
  mag03.pdf (173 kB)
mag03_eng.txt (2 kB)  

Kaduková J., Komorová T.
SILVER BIOACCUMULATION AND BIOSORPTION BY ALGA CHLORELLA KESSLERI FROM MODEL SOLUTIONS
Keywords: bioaccumulation|biosorption|Chlorella kessleri|silver|
No 2 (2002), p. 117-123
  mag04.pdf (158 kB)
mag04_eng.txt (2 kB)  

Laubertová M., Havlík T.
MICROWAVE CHALCOPYRITE LEACHING IN ACIDIFIED FERRIC SULPHATE
Keywords: hydrometallurgy|microwave energy|leaching|chalcopyrite|ferric sulphate|
No 2 (2002), p. 124-128
  mag05.pdf (145 kB)
mag05_eng.txt (1 kB)  

Miškufová A.
PREPARATION OF CAO CLINKERS FROM POWDERED NATURAL LIMESTONES
Keywords: limestone|powder pressing|CaO clinker|bulk density|porosity|microstructure|impurities|hydration rate|
No 2 (2002), p. 129-137
  mag06.pdf (167 kB)
mag06_eng.txt (2 kB)  

Trišč A.
THE EFFECT OF GASEOUS PHASE COMPOSITION AND IRON ORE:IRON CONCENTRATE RATIO ON SINTERED BED PERMEABILITY
Keywords: permeability|sinter charge|high output of sinter machine|iron ore|iron concentrate ratio|gaseous phase composition|
No 2 (2002), p. 138-144
  mag07.pdf (191 kB)
mag07_eng.txt (1 kB)  

Bidulská J., Kvačkaj T., Bodák V., Bidulský R.
CREATION OF MICROGEOMETRY COLD ROLLING STRIP OF MATERIAL ST 15
Keywords: bating strip|electric discharge texturing|surface microgeometry|average roughness|peak count|
No 2 (2002), p. 145-150
  mag08.pdf (153 kB)
mag08_eng.txt (1 kB)  

Varga A., Zsigraiová Z., Andrejaninová E.
ANALYSIS OF BLACK PLATE ANNEALING PROCESS AT CONTINUOUS ANNEALING LINE APPLYING MATHEMATICAL MODEL
Keywords: annealing line|tin plate|thermal regime|mathematical model|heat transfer|specific heat consumption|
No 2 (2002), p. 151-159
  mag09.pdf (177 kB)
mag09_eng.txt (1 kB)  

Kvačkaj T.
DEVELOPMENT TENDENCIES OF METAL FORMING TO 21. CENTURY
Keywords: development trends|metallurgy|metal forming|technologies|teaching|globalisation|
No 2 (2002), p. 160-164
  mag10.pdf (197 kB)
mag10_eng.txt (1 kB)  

Ivánová D., Kavuličová J., Sučik G., Škrobian M., Laco T., Ďurišin J.
THE EFFECT OF ADMIXTURES ON THE DECREASE OF HYPOTHETICAL MELTING POINT OF -IRON
Keywords: hypothetical melting point of -Fe|solidification temperature|Le Chatelier- Šreder equation|
No 2 (2002), p. 165-172
mag11_eng.txt (1 kB)  

Plešingerová B., Súčik G.
THERMAL AND MOISTURE EXPANSION OF POROUS BISCUIT BODIES
Keywords: thermal expansion|biscuit - fired porous body|moisture expansion|
No 2 (2002), p. 173-179
  mag12.pdf (213 kB)
mag12_eng.txt (2 kB)  

Rákoš J.
SUBATOMIC FEATURES OF A STANNUM DIOXIDE LAYER
Abstract
The paper provides an overview of analytical processes which were used in examination of properties of extremely thin layers of stannum dioxide and results that lead to the conclusions regarding the internal subatomic arrangement. The results are unique and legal protection of the essence of the technology has been initiated. The procedure of large-scale application was further successfully researched within a project funded by a grant from the Ministry of Education of Slovak Republic. Large-scale samples were delivered for measurement to Plataforma Solar de Almeria, the European Test Centre for Solar Energy Applications. Refractograms of both thin and thicker layers were used during examination. The results are compared with the measurement of square resistance. Structure of the layers can be related to the measured data only based on measurement of the development of properties over time, the so-called "history of square resistance", which was monitored throughout approximately 190 days under various conditions. Further deliberations are supported by measurements of light activity of layers using laser excitation, which is a universal indicator of the subatomic features of the dioxide layer. Conclusions of the measurements suffice as an argument for usage of direct methods of examination of structures as structures of superthin and subatomic nature.
EDX microanalysis confirmed that the layers are extremely thin with parameters out of determinable range for the method. RTG diffraction analyses with two extremes at 0.141 nm and 0.28 nm correspond to the samples for which the calculation of width from the value of square resistance and unit resistance for SnO2 gives the second diffraction constant, given a linear dependency expectation. A single-peak diffraction record at 0.141 nm was not observed, even though the presence of the layer confirmed through R [?/] is undoubted. Change of square resistance over time and its stability is classifiable based on the values that were obtained when the samples had been originally created. The stable area is characteristic for samples with R that corresponds to the calculated 0.141 nm width. Half-stable behavior, or occasionally faster expiration, can be seen at values of R above the mentioned critical level. When above this value, the samples exhibit excitability by laser with unit output in the range of 1 - 2 kW/m2. This proves the presence of a less dense subatomic structure (subnanostructure), with parts excitable using a coherent light (? = 650 nm) with the mentioned unit output. It is apparently possible this way to indicate the presence of subatomic oxides even with non-conductive properties, which can also be prepared using the developed large-scale non-vacuum technology. For perfectly transparent, subatomically arranged SnO2, both converent and divergent excitations for reflexion as well as refraction through a glass pad were noticed. As an output of the research, apart from non-linear optical observations, an analysis of spatial arrangement of the layers is expected, as well as a comparison with a model for these subatomic structures. These results will be published further on then.

Keywords: subatomic layer|stannum dioxide|large-scale application technology|ultra-thin layers|
No 2 (2002), p. 180-188
  mag13.pdf (168 kB)
mag13_eng.txt (3 kB)  

Ružičková S., Jankovská E., Koller L.
A NEW SPECTROMETRIC TANDEM TECHNIQUE FOR DIRECT ANALYSIS OF SOLID SAMPLES
Keywords: atomic emission spectrometry|direct analysis of solid samples|separated evaporation and excitation of elements|
No 2 (2002), p. 189-195
  mag14.pdf (145 kB)
mag14_eng.txt (2 kB)  

Buchovecká D., Mihok Ľ., Šamu Z.
CLEANNESS OF STEEL SCRAP FOR OXYGEN CONVERTER PROCESS
Keywords: steel scrap|tramping elements|selectivity|
No 2 (2002), p. 196-225
  mag15.pdf (215 kB)
mag15_eng.txt (1 kB)