Wyniki wyszukiwania - BazTech

1

Efficiency analysis and promising applications of silicon drift detectors

Khreptak Aleksander, Skurzok Magdalena

Bio-Algorithms and Med-Systems

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2023

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Vol. 19, no. 1

74--79

EN

Silicon drift detectors (SDDs) stand as a groundbreaking technology with a diverse range of applications, particularly in the fields of physics and medical imaging. This paper provides an analysis of the performance of SDDs as detectors for X-ray radiation measurement, shedding light on their exceptional capabilities and potential in medical imaging. Compared to conventional detectors, SDDs have several notable advantages. Their high efficiency in capturing X-rays allows them to provide outstanding sensitivity and accuracy in detecting even low-energy X-rays. In addition, SDDs exhibit significantly low electronic-noise levels, contributing to better signal-to-noise ratio and better data quality. Furthermore, their high resolution enables exact spatial localization of radiation sources, which is essential for accurate diagnosis. This research is devoted to the evaluation of efficiency and potential application of SDDs in X-ray spectroscopy, with particular emphasis on their application in medical imaging. We focus on evaluating the performance characteristics of SDDs, such as their linearity, stability and sensitivity in detecting X-rays. The aim is to highlight the suitability of SDDs for a wide range of applications.

2

Towards a viable method of reusing silicon carbide. Physicochemical analyses in the studies on the industrial application of the material

Niemczyk-Wojdyła Anna, Fornalczyk Agnieszka, Willner Joanna, Zawisz Rafał

Environment Protection Engineering

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2021

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Vol. 47, nr 4

43--52

EN

The paper presents an investigation on the feasibility of recovery of the highly valuable silicon carbide (SiC) from the slurry waste generated from silicon wafer production in the photovoltaic and semiconductor industry. Compared to the other techniques of recycling, a facile and low-cost method of waste treatment via heat drying followed by low-energy mixing in a shaker mixer was proposed. As the result of the treatment, the slurry waste was converted into a powdered form with dominant content of SiC. Separated SiC material was characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray powder diffraction, and sieve analysis. In addition, analyses of the bulk density, moisture content and melting test were carried out. As was confirmed by the physicochemical analyses, the dominant sieve fraction was in the range of 0.1-0.06 mm, the purity level was a minimum 99% mass of SiC, the moisture content - 0.3%, the bulk density - 1.3 g/cm3. The physicochemical characteristics of the material were crucial for understanding the material performance, assessment of the material quality and determining the perspective directions of the industrial application. The studies revealed that the material exhibited a high application potential as abrasive, especially in abrasive grinding and waterjet cutting.

3

Analysis of a Castings Quality and Metalworking Technology. Treasure of the Bronze Age Axes

Garbacz-Klempka A., Kaczmarek Ł., Kwak Z., Kozana J., Piękoś M., Perek-Nowak M., Długosz P.

Archives of Foundry Engineering

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2018

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Vol. 18, iss. 3

179--285

EN

Cast axes are one of the most numerous categories of bronze products from earlier phases of the Bronze Age found in Poland. They had multiple applications since they were not only used objects such as tools or weapons but also played the prestigious and cult roles. Investigations of the selected axes from the bronze products treasure of the Bronze Age, found in the territory of Poland, are presented in the hereby paper. The holder of these findings is the State Archaeological Museum in Warsaw. Metallurgical investigations of axes with bushing were performed in respect of the casting technology and quality of obtained castings. Macroscopic observations allowed to document the remains of the gating system and to assess the range and kind of casting defects. Light microscopy revealed the microstructure character of these relicts. The chemical composition was determined by means of the X-ray fluorescence method with energy dispersion (ED-XRF) and by the scanning electron microscopy with X-ray energy dispersion analysis in micro-areas (SEM-EDS). The shape and dimensions of cores, reproducing inner parts of axes were identified on the basis of the X-ray tomography images. Studies reconstructed production technology of the mould with gating system, determined chemical composition of the applied alloys and casting structures as well as revealed the casting defects being the result of construction and usage of moulds and cores.

4

Effect of Annealing, Stoichiometry, and Surface on Magnetism of (Pr,Dy)FeCoB Microparticles Ensemble

Kablov E. N., Ospennikova O. G., Kunitsyna E. I., Piskorskii V. P., Korolev D. V., Morgunov R. B.

Archives of Metallurgy and Materials

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2017

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Vol. 62, iss. 3

1923--1930

EN

Magnetic properties of powder (Pr,Dy)FeCoB ferrimagnetic alloys and effects of annealing, surface states were analyzed. X-ray photoelectron spectroscopy and Mössbauer spectra of powders indicate the effect of surface states on phase composition and magnetic properties of the studied powder, if particles average size is smaller than 10 μm. Effect of stoichiometry on magnetic anisotropy was found. Thermal stability of anisotropy field was proved by replacement of Fe atoms with Co atoms.

5

Carbon nanotubes functionalized by salts containing stereogenic heteroatoms as electrodes in their battery cells

Zdanowska S., Pyzalska M., Drabowicz J., Kulawik D., Pavlyuk V., Girek T., Ciesielski W.

Polish Journal of Chemical Technology

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2016

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Vol. 18, nr 4

22--26

EN

This paper concentrates on electrochemical properties of groups of multi-walled carbon nanotubes (MWCNT) functionalized with substituents containing a stereogenic heteroatom bonded covalently to the surface of the carbon nanotube. This system was tested in Swagelok-type cells. The cells comprised a system (functionalized CNT with salts containing S and P atoms) with a working electrode, microfiber separators soaked with electrolyte solution, and a lithium foil counter/reference (commercial LiCoO2 ) electrode. The electrolyte solution was 1 M LiPF6 in propylene carbonate. Using standard techniques (cyclic voltammetry/chronopotentiometry), galvanostatic cycling was performed on the cells at room temperature with a CH Instruments Model 600E potentiostat/galvanostat electrochemical measurements. Methods of functionalization CNT were compared in terms of the electrochemical properties of the studied systems. In all systems, the process of charge/discharge was observed.

6

EDS technique appliance for investigation of laser remelted and alloyed magnesium cast alloys

Konieczny J., Labisz K., Włodarczyk-Fligier A., Polok-Rubiniec M.

Journal of Achievements in Materials and Manufacturing Engineering

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2015

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Vol. 69, nr 2

59--63

EN

Purpose: The paper presents the results of the qualitative and quantitative microanalysis of the chemical composition of the MgAl6Zn1 alloy. Design/methodology/approach: The magnesium alloy has been heat treatment at 505°C for 600 min and ageing at 170°C for 720 min. The study was performed on a transmission electron microscope FEI TITAN company operating at 300kV operating voltage. The qualitative and quantitative microanalysis of the chemical composition of the Mg alloy microareas was examined using EDS. Findings: Analysis of the results of the concentration of the main alloying elements in the separation test using various magnifications revealed that with an increase in the share of the magnification of the alloying elements. This increase is referred to a linear, the regression coefficient R2, depending on the test element is in the range 0.84-0.97. Practical implications: Tested MgAl6Zn1 alloy can be applied among the others in automotive industry but it requires additional researches. Originality/value: It was demonstrated that the lower magnesium concentration in the EDS results is connected with the increase of magnification induces an effect of X-rays scattering only from the analysed particles and the effect of Mg matrix is limited.

7

Diffused phase transition of polycrystalline (Ba0.80Sr0.20)TiO3

Kajtoch C., Bąk W., Gabryś M., Handke B., Starzyk F.

Archives of Materials Science and Engineering

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2009

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Vol. 39, nr 2

88-91

EN

Purpose: The purpose of this work was to determinate the influence of the 20% Sr substitutions (in sublattice A) on changes of the character of phase transition (PT) in comparison with pure barium titanate BaTiO3 (BT). Design/methodology/approach: Polycrystalline samples of (Ba0.80Sr0.20)TiO3 (BS20T) were prepared by calcinations method at temperature 1620 K. X-ray measurements were executed from 10 deg to 120 deg with the 0.008 deg step. Images of the morphology of the samples were taken by means of electron microscope Philips SEM 525M at room temperature. Dielectric measurements were performed with application of Quatro Cryosystem 4.0 Agilent Precision LRC meter HP4824A equipped with WinDETA 5.62 software Novocontrol. Measurements were taken under cooling with 2 K/min speed. Measuring electric field frequency was from the range 20 Hz - 1 MHz. Findings: The difference between the value of temperature of structural transition (cubic-tetragonal) equal 310K and the temperature Tm (the temperature of maximum of real part electric permittivity) equal 340 K was affirmed. It was affirmed, that 20% substitution of Sr ions changed the type of phase transition. The transition was strongly diffused (DPT). The polar character of this solid solution was also observed in a broad temperature range (in the paraelectric phase too). It is connected with the occurrence of polar regions (clusters). Research limitations/implications: The results can be used to describe changes of PT in the DPT solid solutions with ferroactive substitutions in sublattice A. Originality/value: Value of this work relies on the experimental examination of the dielectric properties of (Ba0.80Sr0.20)TiO3 (BS20T) solid solution. The temperature of the DPT was calculated. The low value of phase angle is connected with the existence of the polar regions.

8

Określenie szybkości degradacji warstw ochronnych łączników przy pomocy spektroskopii rentgenowskiej

Karwat C.

Mechanizacja i Automatyzacja Górnictwa

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2006

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R. 44, nr 8

34-37

PL

W artykule przedstawiono wyniki badań szybkości uszkadzania się warstwy ochronnej srebra naniesionej na styki miedziane łącznika instalacyjnego. Sformułowano odpowiednie wnioski dotyczące doboru odpowiedniej grubości pokrycia srebrem dla danych warunków pracy zestyku łącznika.

EN

The results of the tests of the damage rate of protective silver coating spread on the switch contacts made of copper have been presented in the paper. There have been formulated the adequate conclusions relating to the choice of a suitable silver coating for the given operating conditions of the contacts.

9

Nanolikwacja i nanokrystalizacja w szkłach krzemianowo-fosforanowych.

Handke M., Sitarz M., Rokita M.

Archiwum Nauki o Materiałach

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2003

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T. 24, nr 4

467-475

PL

W artykule przedstawiono wyniki badań mogące stanowić podstawę technologii otrzymywania bioaktywnych nanomateriałów na drodze kierowanej krystalizacji szkieł krzemianowo-fosforanowych. Otrzymano szkliste i szkłokrystaliczne materiały o wysokiej zawartości krzemionki (>50% mol. SiO2) z układów: NaCaPO4-SiO2 i AlPO4-NaCaPO4-SiO2. Na podstawie badań rentgenowskich oraz spektroskopowych w dalekiej podczerwieni stwierdzono amorficzność bądź krystaliczny charakter poszczególnych próbek. Badania na mikroskopie skaningowym wraz z mikroanalizą rentgenowską wskazały wyraźnie na likwację faz krzmianowych i sodowo-wapniowo-fosforanowych. Stwierdzono homogenizujący wpływ dodatku glinu na materiały z omawianego układu. Określono składy matrycy i kulistych inkluzji oraz wytypowano próbki o inkluzjach rozmiarów nanometrycznych. Badania DTA wykazały, że wyselekcjonowane szkła charakteryzują się wielostopniową krystalizacją. Na podstawie badań spektroskopowych w podczerwieni zasugerowano model struktury omawianych szkieł.

EN

The aim of the work is to create the base of technology of bioactive nanomaterials obtaining on the way of phospho-silicate glasses controlled devitrification process. The glasses and glass-ceramics materials of high silica contents (more than 50 mol.%) from the NaCaPO4-SiO2 and AlPO4-NaCaPo4-SiO2 system were obtained. On the base of X-ray and far infrared spectroscopy (FT-FIR) the amorphous or crystalline form of samples was stated. The scanning microscope analyses with the X-ray microanalysis have shown clearly the liquation of silicate and sodium-calcium phosphate phases. The homogeneous influence of alumina addition was stated in the discussed system. Chemical constitution of matrix and spherical inclusions was determined. Some glasses of nanometric inclusions size were selected. DTA analysis showed that selected glasses are characterized by multistage crystallization. The model of the discussed glasses structure was suggested on the base of infrared spectroscopy measurements.