It was found in this work that silicotungstic acid hydrate could be mixed w
ith phosphoric acid (H3PO4, 85%) to make a viscous paste material with high
conductivity (10(-2) S/cm at room temperature). The STA/H3PO4 paste sample
s were stable at 80 degreesC in the atmosphere, and at 100 degreesC under c
onstant humidity over 10 days. The conductivity behavior of the paste sampl
es has been investigated under various conditions, and it was found to be d
ependent on temperature, paste composition, and environment humidity. (C) 2
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