Wyniki wyszukiwania - BazTech

1

Research on the mechanical and electromagnetic properties of white Portland cement paste containing basalt fiber

Li Yue, Liu Yunze, Cheng Yaping, Jin Caiyun

Archives of Civil and Mechanical Engineering

|

2023

|

Vol. 23, no. 1

art. no. e63, 2023

EN

The search for construction materials that contribute to 5G signal transmission is important for the development of modern communication technologies. In this paper, the mechanical properties of white Portland cement (WPC) paste mixed with basalt fiber (BF) were analyzed and its electromagnetic properties were fully investigated. First, the fluidity and strength of WPC pastes with different BF contents were tested. Subsequently, the electromagnetic parameters of WPC paste samples were tested in the frequency band of 3.94 GHz-5.99 GHz, and their electromagnetic transmission properties were calculated. Finally, the mechanism of BF affecting the strength and electromagnetic transmission performance of WPC pastes was profiled using scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP). The results show that BF can reduce the fluidity of WPC pastes. With the increase of BF doping, the strength of WPC paste rises and then decreases, and reaches the maximum strength when the volume content of BF is 0.6%. With the increase of BF content, the electromagnetic wave reflection rate of WPC paste decreases, but the absorption and transmission rate increases. The bridging effect of BF, etc. improves the strength of the paste. In WPC pastes, with the increase of BF doping, the increase of electromagnetic wave absorption rate is smaller than the decrease of reflection rate, which leads to the improvement of electromagnetic transmission performance.

2

Wybrane zastosowania magnetronu cylindrycznego w produkcji części maszyn

Betiuk Marek, Łataś Zbigniew

Inżynieria Powierzchni

|

2019

|

nr 4

41--49

PL

W artykule przedstawiono podstawowe zagadnienia z zakresu fizyki i chemii plazmy. Omówiono wybrane obszary jej zastosowań w takich dziedzinach jak: metalurgia, inżynieria materiałowa, produkcja elementów uzbrojenia i ekologiczna technika. Omówiono nową, innowacyjną metodę nakładania powłok na wewnętrzne powierzchnie otworów i przewodów cylindrycznych, opracowaną i opatentowaną w Sieci Badawczej Łukasiewicz – Instytut Mechaniki Precyzyjnej. Artykuł w syntetycznej formie umożliwia zapoznanie się z szerokim spektrum zastosowań i potencjałem badawczym, jaki posiadają nowoczesne technologie hybrydowe.

EN

The article presents basic issues in the field of plasma physics and chemistry. Selected areas of their application in such fields as: metallurgy, engineering of materials, production of weaponry elements and ecological technology have been discussed. A new, innovative method of applying coatings to the internal surfaces of bores and cylindrical pipes, developed and patented in the Łukasiewicz Research Network – Institute of Precision Mechanics, has been discussed. The article in a synthetic form allows you to familiarize yourself with the wide spectrum of applications and research potential of modern hybrid technologies.

3

Design and analysis of interior composite-rotor bearingless permanent magnet synchronous motors with two layer permanent magnets

Sun X., Su B., Chen L., Yang Z., Li K.

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2017

|

Vol. 65, nr 6

833--843

EN

In this paper, a new type of interior composite-rotor bearingless permanent magnet synchronous motors (BPMSMs) with two layer permanent magnets (PMs) is proposed. In order to reduce the torque ripple of this kind of motors, the sizes of PMs are optimized. Moreover, the magnetic field analysis of the interior composite-rotor BPMSM with two layer PMs is carried out by the finite element method (FEM). The corresponding static electronic magnetic characteristics at no load, including magnetic field, PM flux linkage and inductance, are studied in detail. In addition, electromagnetic torque characteristics and suspension force characteristics are also investigated thoroughly. The results of the analysis and simulation lay a significant foundation for further research on the interior composite-rotor BPMSMs with two layer PMs.

4

VIII Międzynarodowa Konferencja Bianisotropics 2000

Popik J.

Postępy Radiotechniki

|

2002

|

T. 47, Nr 144

42-50