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Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 21 až 40 z 71
Navrátil, Jiří , Šíma, Karel , Řeřicha, Tomáš , Hamáček, Aleš
Preparation and Application of Carbon Nanotubes Ink for Aerosol Jet Printing System

The paper deals with the carbon nanotubes ink preparation and its application for Aerosol Jetprinting system. Aerosol Jetprinter allows using wide range ofmaterials within the meaning of their viscosity, particle size or used solvents. The carbon allotropes (structurally different forms of c...

Šíma, Karel , Štulík, Jiří , Šlauf, Josef , Blecha, Tomáš , Hamáček, Aleš
Investigation of π stacking functionalization of carbon allotropes for RH sensing

This paper is focused on the noncovalent functionalization of CNT by π stacking of molecules for relative humidity (RH) sensing. This type of functionalization is not used frequently, but it potentially offers a simple way how to control the level of functionalization of the c...

Janda, Martin , Syrový, Tomáš , Pretl, Silvan , Vik, Robert , Řeboun, Jan
Characterization of printed thermistors

This paper deals with the characterization of printed thermistors based on metallic oxides. In total, three different thermosensitive printing formulations were tested. Formulations differed in the mechanical properties of a polymeric binder. The long-term stability, calibration curves, hysteresis, and...

Suchý, Stanislav , Moučková, Kateřina , Soukup, Radek
Testing of novel textile capacitive pressure sensors intended for healthcare applications

The paper deals with the design, fabrication and testing of the textile pressure sensors that operate on the principle of capacity change. The sensors, which are based on a multi-layer sandwich arrangement of textile layers, are intended for healthcare applications. The article describe...

Šlauf, Josef , Řeboun, Jan
Effect of the gate electrode/electrolyte interface on OECT performance

An organic electrochemical transistor (OECT) with a standard vertical topology and poly(3,4-ethylene-dioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as the active material of the channel is presented. It was found that the specific combination of the gate electrode material and electrolyte influences the...

Šíma, Karel , Navrátil, Jiří , Hladíková, Julie , Bouzek, Stanislav , Hamáček, Aleš
Design and Characterization of Embroidered Electroacoustic Transducer

This paper is focused on designing and characterization of embroidered electroacoustic transducer placed on the magnet. This type of transducer can be used as a feedback or notification element in an advanced smart textile system. Multiple transducer designs and threads were used in...

Steiner, František , Hirman, Martin , Prosr, Pavel , Rous, Pavel
Properties verification of improved lead-free solder alloys

This article presents research focused on the reliability of soldered joints. The quality of solder joints is formed already during the soldering process. The first parameter that determines the quality of the connection is solderability. Good solderability is essential for the subsequent&#x...

Janda, Martin , Pretl, Silvan , Řeboun, Jan
In-situ monitoring method for curing of pastes used in printed electronics

In this paper, a method for in-situ monitoring of curing of materials for printed electronics applications is introduced. Materials for printed electronics in form of inks and pastes need to be cured after printing. Curing is an important post-printing process. Curing is often done...

Blecha, Tomáš , Smítka, Václav , Štulík, Jiří
Impedance spectroscopy for sensor elements optimalization

One of the possibilities of evaluating the response of sensor systems is the use of impedance spectroscopy, which identifies changes in impedance in the frequency domain in case of the analytes exposure. However, the high-frequency properties of the sensors are affected by parameters&#x...

Šíma, Karel , Řeboun, Jan , Moravcová, Daniela , Švecová, Lucie , Kalaš, David , Soukup, Radek , Hamáček, Aleš
Washing resistance of textile ribbon dismountable interconnections in smart textiles

This paper is focused on the interconnection and joining of electronic modules by conductive textile ribbons. There was done basic research on the interconnection types. The main focus is on the detachable interconnection between conductive ribbons and smart textiles blocks. Two interconnect...

Kalaš, David , Kalčík, Jan , Řeboun, Jan , Soukup, Radek , Hamáček, Aleš
Stretch testing of SMD resistors contacted by a novel thermo-compression method on a textile ribbon

This paper is focused on the dynamic stretch testing of SMD chip resistors which were contacted on a textile conductive ribbon by a thermo-compression method. In this method, the plastic housing made from Acrylonitrile Butadiene Styrene (ABS) material with a cavity for SMD componen...

Michal, David , Janda, Martin , Řeboun, Jan
Sintering of printed Ag on ceramic substrates with the use of formic acid

This paper deals with joints creation on ceramic substrates with printed conductive patterns made from copper and silver. Sintering on the printed patterns is extremely specific because of porous structure, big grains, and glassy phase. Joints are created using pressureless sintering technol...

Hlína, Jiří , Řeboun, Jan , Hamáček, Aleš
Properties of thick printed copper films on aluminum nitride substrates

This paper is focused on the properties of Thi ck Printed Copper (TPC) films printed on aluminum nitride (AlN) substrates. TPC technology is based on thick film technology and it is predominantly intended for power substrate manufacturing. TPC films can be also printed on cera...

Nikolić, Valentino , Kadlec, Petr , Polanský, Radek , Utrera-Barrios, Saul , Santana, Marianella Hernandez
Dielectric and thermal properties of self-healing carboxylated nitrile rubber ionically cross-linked with zinc oxide

Dielectric and thermal properties of carboxylated nitrile rubber (XNBR), ionically cross-linked with zinc oxide (ZnO), were characterized to verify its suitability for a high-voltage insulation application. Moreover, the material self-healing (SH) capabilities were assessed after dielectric strength measurement...

Kadlec, Petr , Musil, Ondřej , Nikolić, Valentino , Polanský, Radek
Effect of inhomogeneities in epoxy-glass-mica composites on conductive channel formation

Epoxy-glass-mica composites consisting of an epoxy matrix, glass fibers, and a mica paper are commonly used in insulation systems where high dielectric strength is expected. Such insulating systems are typically made from partially cured and flexible prepregs that are layered and shaped ...

Kadlec, Petr , Pihera, Josef , Prosr, Pavel , Polanský, Radek
Dielectric analysis of selected polyimide films and derived epoxy-based sandwich composites

Composites with the epoxy matrix are still the most common composites used in high voltage electrical insulation systems. Polyimides are materials with excellent heat resistance and high electrical strength for application, where high overall endurance and reliability even under harsh operating&#...

Kadlec, Petr , Polanský, Radek
Influence of fillers based on different types of tubular halloysite on dielectric properties of epoxy-based composites

The addition of tubular halloysite as a perspective type of mineral filler, even in only a few weight percent, can significantly affect the dielectric properties of base polymer. The resulting dielectric properties of the composite could also depend on the type of selected tubular&...

Hardoň, Štefan , Kúdelčík, Jozef , Hornak, Jaroslav , Trnka, Pavel , Tamus, Zoltán Adam , Koltunowicz, Tomasz
Effect of ZnO nanoparticles on the dielectric properties of polyurethane and epoxy resins

This study aims to present the influence of Zinc Oxide (ZnO) filler on the dielectric properties of two types of commercial potting compounds. For this purpose, the methods of dielectric spectroscopy were used to measure the changes in dielectric responses of polyurethane and epoxy...

Hornak, Jaroslav , Prosr, Pavel , Trnka, Pavel , Kadlec, Petr , Michal, Ondřej , Hardoň, Štefan
Effect of MgO nanoparticles on material properties of cold-curing epoxy and polyurethane mixtures

Potting compounds are an integral part of a large number of electrical devices, in which play the role of mainly mechanical or photosensitive protection. So-called cold-curing resins are one of the subgroups of potting mixtures. This article focuses on this type of potting compound...

Michal, Ondřej , Mentlík, Václav , Hornak, Jaroslav
Impact of ultrasonic mixing on the electrical properties of PEI/SiO2 nanocomposites

The usage of nanoparticles in various applications is a widely discussed topic in the science community. One of these applications is dielectrics and the proposition of nanoparticles as modification of matrix material in composites. Epoxy resins are highly used resin material. However, ...

Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 21 až 40 z 71