Characteristics of nano-sized Ag–Pd (70–30)–glass composite powders prepared by flame spray pyrolysis

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Nano-sized Ag–Pd alloy and Ag–Pd–glass composite powders were prepared by flame spray pyrolysis. The Ag–Pd molar ratio was fixed at 70–30. The mean sizes of the Ag–Pd and Ag–Pd–glass powders were 29 and 25 nm, respectively. The Ag–Pd alloy powder began to be oxidized rapidly at approximately 365°C and oxidation of alloy powders was finished at 420°C. On the other hand, oxidation of the Ag–Pd–glass composite powders gradually occurred around 400°C and oxidation of the powders was finished at 530°C. The specific resistances of the conducting films formed from the nano-sized Ag–Pd–glass composite powders were 76, 59, 35 µΩ·cm at firing temperatures of 550, 600 and 800°C, respectively.