This article deals with the impact of electrically conductive adhesive quantity on the shear strength of joints glued by adhesives “EPO-TEKⓇ H20S” and “MG8331S” on three types of substrates (FR-4, MELINEXⓇST504, DuPont™ PyraluxⓇAC). These joints were made by gluing chip resistors 1206, 0805 and 0603, with two curing profiles for each adhesive. Different thicknesses of stencil and reductions in the size of the hole in stencils were used for this experiment. These differences have an effect on the quantity of conductive adhesives which must be used on the samples. Samples were measured after the curing process by using a shear strength test applied by the device LabTest 3.030. This article presents the effects of different curing profiles, various types of substrates, and different quantities of adhesives on the mechanical strength of the joint.
Setia Budi, Sukro Muhab, Agung Purwanto, Budhy Kurniawan and Azwar Manaf
The effect of electrodeposition potential on the magnetic properties of the FeCoNi films has been reported in this paper. The FeCoNi electrodeposition was carried out from sulfate solution using potentiostatic technique. The obtained FeCoNi films were characterized by X-ray diffractometer (XRD), atomic absorption spectrometer (AAS) and vibrating sample magnetometer (VSM). It has been shown that the electrodeposition potential applied during the synthesis process determines the magnetic characteristics of FeCoNi films. The more negative potential is applied, the higher Ni content is in the FeCoNi alloy. At the same time, Co and Fe showed almost similar trend in which the content decreased with an increase in applied potential. The mean crystallite size of FeCoNi films was ranging from 11 nm to 15 nm. VSM evaluation indicated that the FeCoNi film is a ferromagnetic alloy with magnetic anisotropy. The high saturation magnetization of FeCoNi film was ranging from 86 A·m2/kg to 105 A·m2/kg. The film is a soft magnetic material which was revealed by a very low coercivity value in the range of 1.3 kA/m to 3.7 kA/m. Both the saturation magnetization and coercivity values decreased at a more negative electrodeposition potential.
Vojtech Valkovič, Roland Jančo and Karel Frydrýšek
The present paper deals with the calculation of stresses on the pipeline system embedded on a flexible substrate which is burdened by a landslide. As well as taking into account the probability of the influences acting on the pipe as wall thickness, and others.
Pavel Kulha, Wolfgang Hilber, Alexandr Laposa and Bernhard Jakoby
The fabrication procedure and characterization of low-cost electrodes for capacitive level sensors realized on a flexible substrate are presented in this paper. The aim was to prepare conductive electrodes by printing of silver and PEDOT:PSS pastes on coated PET foil. Individual interdigital capacitors and a system with embedded microcontroller readout were designed for a comparative study. Individual capacitors in the form of interdigital electrodes (IDT) were designed with different finger width/spacing dimensions from 300/300 μm to 800/800 μm, a finger length 10 mm and 15 mm and an overall length of 100 mm. A demonstrator device featuring an integrated microcontroller, sensing and reference capacitive sensors and a resistive temperature sensor was realized to proof a practical utilization. The microcontroller is used to calculate capacitances of IDT electrodes in terms of charging time proportional to the fluid level. The design with reference capacitor can be directly applied to different fluids with a wide range of conductivities and dielectric constants without recalibration. The printed structures were thermally laminated with covering PET foil. The sensitivity of the fabricated devices was characterized in liquids with different relative permittivity and conductivity (water and oil). The highest measured sensitivity was 0.7 pF/mm and 0.08 pF/mm for water and oil respectively, with resolution down to 0.1 mm.
Chunyu Deng, Chaoran Qin, Xinyi Li, Shaoqing Li, Zhixiong Huang, Lianmeng Zhang, Xuedong Zhou, Dongyun Guo and Yang Ju
PbZr0.52Ti0.48O3 nanocrystals were synthesized by a hydrothermal method. The effect of NaOH concentration, reaction temperature and time on nucleation and growth of PbZr0.52Ti0.48O3 nanocrystals was investigated. As the 0.05 mol/L PbZr0.52Ti0.48O3 precursors were heated at 200 °C for 21 h with NaOH concentration of 0.5 mol/L, the tetragonal PbZr0.52Ti0.48O3 nanocrystals were formed, and the grain size was more than 20 nm. With increasing the NaOH concentration from 0.5 to 1.5 mol/L, the grain size of PbZr0.52Ti0.48O3 nanocrystals decreased. When the precursors were heated at different temperatures (140 °C to 200 °C) for 21 h with 1.0 mol/L NaOH, single-phase PbZr0.52Ti0.48O3 nanocrystals were obtained at 160 °C to 200 °C. With increasing the reaction temperature from 160 °C to 200 °C, the grains size of PbZr0.52Ti0.48O3 nanocrystals increased from 5 nm to 9 nm. When the precursors were heated at 160 °C in different reaction times from 6 h to 21 h, the evolution from amorphous to crystalline PbZr0.52Ti0.48O3 nanocrystals in correlation with the reaction time was observed. Single crystalline PbZr0.52Ti0.48O3 nanocrystals with narrow size distribution (from 5 nm to 9 nm) were synthesized by controlling the NaOH concentration, reaction temperature and time. The obtained results can find potential application in preparing PbZr0.52Ti0.48O3 thin films on flexible substrates.
Ilda Kazani, Gilbert De Mey, R. Klepacko, Carla Hertleer, Genti Guxho, Lieva Van Langenhove and Andrzej Napieralski
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 Merilampi S., Laine-Ma T., Ruuskanen P. 2009. The characterisation of electrically conductive silver ink patterns on flexiblesubstrates. Microelectronics Reliability. vol.49, p.782-790.
 Yang Y.L., Chuang M.C., Lou S.L., Wang J. 2010. Thick-film textile-based amperometric sensors and biosensors. Royal Society of Chemistry. vol.135, p.1230-1234.
R. Pawlak, E. Korzeniewska, C. Koneczny and B. Hałgas
thin layers of different shapes produced on flexiblesubstrates, in Polish Przegląd Elektrotechniczny (Electrical Review) 2014 vol.90, no. 12, Pages 233-236
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Othman A. Al Hanbali, Haji Muhammad Shoaib Khan, Muhammad Sarfraz, Mosab Arafat, Shakeel Ijaz and Abdul Hameed
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94. A. J. Steven-Fountain, A. G. Atkins, G. Jeronimidis, J. F. V. Vincent, D. F. Farrar and R. A. Chivers, The effect of flexiblesubstrates on
Evgeni Eltzov, Abri Lavena De Cesarea, ‘Yuen Kei Adarina Low and Robert S. Marks
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94. Wan H, Yin H, Lin L, Zeng X,Mason AJ, Miniaturized planar room temperature ionic liquid electrochemical gas sensor for rapid multiple gas pollutants monitoring. Sensors and Actuators B: Chemical, 2018; 255: p. 638-646.
95. Kuberský P, Syrový T, Hamáček A, Nešpůrek S,Syrová L, Towards a fully printed electrochemical NO2 sensor on a flexiblesubstrate using ionic liquid based polymer electrolyte. Sensors and Actuators B: Chemical, 2015; 209: p. 1084-1090.
96. Rao Z, Liu L, Xie J,Zeng Y, Development of a benzene vapour sensor
Harsha Kasi, Robert Meissner, Alexandre Babalian, Harald van Lintel, Arnaud Bertsch and Philippe Renaud
resistivity is linearly dependent on the log PRF for both the species. For embryonic chicks, owing to similarity in the data across various trials, it can be observed that there is a unique PRF for each resistivity. On the contrary, the three rat trials suggest multiple PRFs for each resistivity.
PRF vs. resistivity plots for the five embryonic chick trials. In general, a good reproducibility of resistivities at a particular PRF in the trials was observed.
To the best of our knowledge, planar, bipolar microelectrodes on a flexible