Autor: Gryglewicz, J - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of high Al fraction on reactive ion etching of AlGaN/GaN heterostructures
Autorzy:: Gryglewicz, J
Stafiniak, A
Wosko, M
Prazmowska, J
Paszkiewicz, B
Powiązania:: https://bibliotekanauki.pl/articles/174309.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: reactive ione etching
HEMT
AlGaN/GaN heterostructure
Opis:: In this study, the results of reactive ion etching (RIE) process of diversified Al content AlxGa1–xN/AlN/GaN/sapphire heterostructures were presented. The Al fractions of 22, 25, 31 and 36% were examined. An impact of Al content in the heterostructures on the etch rates and surface morphology was investigated. The influence of used Cl2/BCl3/Ar gas mixture with varying of BCl3 flow on the etch rate of Al0.2Ga0.8N/GaN/sapphire, surface morphology and angle of mesa slope, was discussed.
Źródło:: Optica Applicata; 2013, 43, 1; 27-33
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Influence of RF ICP PECVD process parameters of diamond-like carbon films on DC bias and optical emission spectra
Autorzy:: Oleszkiewicz, W
Markowski, J
Srnanek, R
Kijaszek, W
Gryglewicz, J
Kovac, J
Tlaczala, M
Powiązania:: https://bibliotekanauki.pl/articles/173686.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: PECVD
diamond-like carbon layers
OES
Raman spectroscopy
AFM
Opis:: The work presents the results of a research carried out with PlasmaLab Plus 100 system, manufactured by Oxford Instruments Company. The system was configured for deposition of diamond-like carbon films by ICP PECVD method. The change of an initial value of DC bias was investigated as a function of set values of the generator power (RF generator and ICP generator) in the constant power of the RF generator operation mode. The research shows that the value of DC bias nearly linearly depends on the RF generator power value and is affected only in a small degree by the power of ICP discharge. The capability of an installed OES spectrometer has been used to ensure the same starting conditions for the deposition processes of DLC films. The analysis of OES spectra of RF plasma discharge used in the deposition processes shows that the increase in ICP discharge power value results in the increased efficiency of the ionization process of a gaseous precursor (CH4). The quality of deposited DLC layers was examined by Raman spectroscopy. Basing on the acquired Raman spectra, the theoretical content of sp3 bonds in the structure of the film was estimated. The content is ranging from 30% to 65% and depends on ICP PECVD deposition process parameters.
Źródło:: Optica Applicata; 2013, 43, 1; 109-115
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Precursors of volatile organic compounds emitted during phosphorite processing
Autorzy:: Śliwak, A.
Gryglewicz, S.
Hoffmann, J.
Gryglewicz, G.
Powiązania:: https://bibliotekanauki.pl/articles/779723.pdf
Data publikacji:: 2012
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: fosforyty
bitumen
skład
zapachy
phosphorites
composition
odours
Opis:: The composition of solvent-soluble organic matter of phosphorite, which is a precursor of volatile organic compounds emitted by the fertilizer industry, was studied. A benzene-methanol mixture and chloroform were used for the extraction of free and bound bitumen from phosphorites, respectively. The separated bitumen fractions were characterized qualitatively by GC-MS and quantitatively by GC-FID. n-Alkanes, n-alkenes, fatty acids and isoprenoids were identified in the extracts. The main components were n-alkanes and n-alkenes, constituting over 80% of the total bitumen determined. An unexpected presence of n-alkenes only in the free bitumen fraction was found. The possible source of ill-smelling substances evolved during treatment of phosphorite with H2SO4 was discussed.
Źródło:: Polish Journal of Chemical Technology; 2012, 14, 2; 62-69
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Emission of the odour substances from fertilizer industry
Autorzy:: Hoffmann, J.
Gryglewicz, G.
Hoffmann, K.
Gryglewicz, S.
Okereke, W.
Skut, J.
Powiązania:: https://bibliotekanauki.pl/articles/779216.pdf
Data publikacji:: 2009
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: odory
nawozy mineralne
odours
mineral fertilizers
Opis:: Mineral fertilizers are indispensable for the intensification of plant production in agriculture. This process can cause a significant odour nuisance for the environment due to organic compounds content in apatites and phosphorites converted into fertilizers. The following chemical compounds are emitted to the gas phase among others: hydrogen sulphide, organic sulphides and (methyl, ethyl, isopropyl, butyl) disulphides, chain hydrocarbons, organic oils, waxes and carboxylic acids. A method using gas chromatography analysis with the mass detector (TD-GS-MS), to determine trace concentrations, was developed and tested for the assessment of odour nuisant substances emission from these processes. Application of additional thermal desorber to enable the intense desorption of the investigated organic compounds (previously adsorbed on classical sorbents) in the industrial research has been taken into consideration. In effect it facilitates the accumulating substances to be analyzed at short time interval providing identifying measurements. The technique has been verified during the investigation of the substances emitted in fertilizers processes at Maroko phosphorite decomposition. The organic sulfur compounds, aliphatic and aromatic hydrocarbons have been detected.
Źródło:: Polish Journal of Chemical Technology; 2009, 11, 1; 12-15
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Initial studies on lubricity and surface properties of selected ionic liquids
Autorzy:: Kałdoński, T. J.
Stańczyk, M.
Gryglewicz, Ł.
Kałdoński, T.
Powiązania:: https://bibliotekanauki.pl/articles/244598.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: tribology
ionic liquids
surface tension
contact angle
lubrication
Opis:: The paper discusses the results of the studies on the surface properties and lubricating abilities of five ionic liquids compared to a high quality gear oil: Mobilube 1SHC 75W90 and two base oils: PAO-6 and SN-650. The investigated ionic liquids were: 1) tetrafluoroborate 1- benzyl-3-methylmidazolium, 2) bis (trifluoromethylsulfonyl) imide 3-methyl-1- propylpyridinium, 3) bis (trifluoromethylsulfonyl) imide 1,2-dimethyl-3-propylimidazolium, 4) bis (trifluoromethylsulfonyl) imide trihexyltetradecylphosphonium), 5) tetrafluoroborate trihexyltetradecylphosphonium. The density, surface tension and wetting angle as well as dynamic and kinematic viscosity were measured. Next, the lubricity properties were evaluated using the four-ball tester. The research results showed the more better lubricity properties of ionic liquids than the base oils. The research results showed the more better lubricity properties of ionic liquids than the base oils. The ionic liquids had the comparable properties to a high quality gear oil. Obtained results of these preliminary studies confirmed a possibility of using selected ionic liquids as new lubricants. These compounds can probably replace the lubricants used so far and find a wide scope of application in lubrication technology in the future. However, particular implementations require further complex studies.
Źródło:: Journal of KONES; 2011, 18, 1; 213-226
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Investigations on lubricity and surface properties of selected perfluoropolyether oils
Autorzy:: Kałdoński, T. J.
Gryglewicz, Ł.
Stańczyk, M.
Kałdoński, T.
Powiązania:: https://bibliotekanauki.pl/articles/244618.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: tribology
perfluoropolyethers (PFPE)
surface tension
contact angle lubrication
Opis:: In the paper the investigative results of lubricity and surface properties for four synthetic perfluoropolyether (PFPE) oils, comparing with the high quality gear oil Mobilube 1SHC 75W-90 and two base oils PAO-6 and SN-650, are discussed. The goal of the research was to identify anti-wear and anti-seizing properties of PFPE oils correlation with their surface-energetic and viscosity-temperature properties. Modern test equipment was used for perfomed research. The following apparatuses were used: KSV Sigma 701 and KSV CAM 100 made in Finland, AMVn Anton Paar made in Austria, and T-02 four-ball apparatus made in Poland. Measurement of density, surface tension and wetting angle were done with the use of KSV Sigma 701 apparatus, according to its instruction manual. The static wetting angle on the real surface of a steel plate was determined with the use of KSV CAM 100 apparatus. The dynamic viscosity of the tested compounds was determined with the use of AMVn microviscometer. The tests of the lubricity properties of the synthetic oils and comparative liquids were perfomed with the use T-02 four-ball tester. The investigative results showed that PFPE oils can be used particularly in hydrodynamic and elastohydrodynamic lubrication.
Źródło:: Journal of KONES; 2011, 18, 1; 199-212
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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