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The dissolution of copper with trace acid, oxygen, moisture, nitrogen compounds, and corrosive sulfur in oil formed copper ions. A transformer oil with 7.0 mg/kg copper ion was treated via the adsorption method. The efficiency of adsorbent was raised with the increase of addition amount and temperature. In the adsorption process, the copper ions, interfacial tension, water content, acid value, volume...
In this paper, multi-walled carbon nanotube (MWCNT) ink was selectively patterned by inkjet printing on substrates to form conductive traces and electrodes for interconnection application. MWCNT was firstly functionalized using concentrated acid and dispersed in deionized water to form a colloidal solution. Various concentrations of MWCNT were formulated to test the stability of the solution. The...
Novel design concepts and cutting edge results are presented for high-power AlGaN/GaN Heterostructure Field-Effect Transistor switches for power converters, control and radio-frequency applications. For power switching, the HFET design has to be different from that of power amplifiers in order to minimize the contact resistance and avoid current crowding in the metal electrodes of large-periphery...
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