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The preparation of lead-free thick-film resistors are reported:using RuO 2 and ruthenates as conductive particles,glass powders composed of B 2 O 3,SiO 2,CaO and Al2 O 3 as insulating phase,adding organic matter which mainly consists of ethyl cellulose and terpineol to form printable pastes.Resistors were fabricated and sintered by conventional screen-printing on 96%Al 2 O 3 substrates,and then sintering in a belt furnace.X-ray diffraction(XRD) and electron scanning microscopy(SEM) have been used to characterize the conductive particles.The resistors exhibit good refiring stability and low temperature coefficient of resistance.Sheet resistance spans from about 80Ω/□ to 600Ω/□.The resistors prepared are qualified for common use.
The preparation of lead-free thick-film resistors are reported: using RuO 2 and ruthenates as conductive particles, glass powders composed of B 2 O 3, SiO 2, CaO and Al 2 O 3 as insulating phase, adding organic matter which largely consists of Resistors were fabricated and sintered by conventional screen-printing on 96% Al 2 O 3 substrates, and then sintered in a belt furnace. X-ray diffraction (XRD) and electron scanning microscopy (SEM) have been used to characterize the conductive particles. The resistors exhibit good refiring stability and low temperature coefficient of resistance. Sheet resistance spans from about 80Ω / □ to 600Ω / □. The resistors prepared are qualified for common use.