Electroconductivity of Ag/ZnO composite material based on coprecipitate compositions
The influence of oxide phase contents from 0 to 10% and temperature (293 – 550 К) on (ρ) — Ag/ZnO samples’ resistivity was investigated. Samples were obtained with co-precipitating method and have a porosity rate about 2%. Resistivity rate is 2,1 for Ag/2ZnO and 3,0 for Ag/10 ZnO mОm·sm. The influence of powder’s microstructure feature, which consist of silver participles (~1 µm) and ZnO (~20 nm), on electrical properties was studied. Presence of bad conducting oxide phase in the silver matrix increases the grow of r rate, moreover, changing character depends on ZnO participles size and their distribution.Resistance temperature coefficient of metals α is about 3·10 –3 K –1 and doesn’t depend on oxide phaseAgamount. Methodical variation of synthesis approach and technological parameters of producing compositesbased on Ag/ZnO give the ability to affect their resistance.