Lidé

Kateřina Bartošová, Dr. rer. nat.

Všechny publikace

Evaluation of Electrolytically Manufactured Copper Foils Properties

  • DOI: 10.1109/ISSE57496.2023.10168520
  • Odkaz: https://doi.org/10.1109/ISSE57496.2023.10168520
  • Pracoviště: Katedra elektrotechnologie, Katedra telekomunikační techniky
  • Anotace:
    This paper deals with electrolytically manufactured copper foils prepared under different manufacturing conditions. The main goal is to evaluate mechanical and electrical properties concerning the further use of foils for flexible applications in the electronics industry. Four samples of copper foil were prepared using an electrolytic manufacturing process, with different compositions of the electrolyte (Cu2+=50g/1, H2SO4=70g/1, Cadditives=0,5m1/1, and Cu2+=50g/1, H2SO4=70g/1, Cadditives=1m1/1) and different properties of cathodes (shiny stainless steel and roughened stainless steel, sanded with 1000 grit sandpaper). The current density was 1 A/dm2. The mechanical properties like elongation at break, modulus of elasticity in tension, tensile strength, and hardness were evaluated. The electrical conductivity of manufactured copper foils was also evaluated. The results show that the properties of copper foils were affected not only by changes in electrolyte composition (concentration of additives), but also by the roughness of cathodes (the higher roughness increased the effective surface of the cathode). The electrolytically prepared copper foils were compared with commercially available foil prepared by the metallurgical rolling process. The commercial sample exhibited similar electrical conductivity, lower hardness and higher modulus of elasticity in tension.

Methodology of Studying Effects of Mobile Phone Radiation on Organisms: Technical Aspects

  • DOI: 10.3390/ijerph182312642
  • Odkaz: https://doi.org/10.3390/ijerph182312642
  • Pracoviště: Katedra telekomunikační techniky
  • Anotace:
    The negative influence of non-ionizing electromagnetic radiation on organisms, including humans, has been discussed widely in recent years. This paper deals with the methodology of examining possible harmful effects of mobile phone radiation, focusing on in vivo and in vitro laboratory methods of investigation and evaluation and their main problems and difficulties. Basic experimental parameters are summarized and discussed, and recent large studies are also mentioned. For the laboratory experiments, accurate setting and description of dosimetry are essential; therefore, we give recommendations for the technical parameters of the experiments, especially for a well-defined source of radiation by Software Defined Radio.

Za stránku zodpovídá: Ing. Mgr. Radovan Suk