Composite indium oxide particles and a method for manufacturing the same, and conductive paint, conductive coating film and the conductive sheet

The zinc compound is mixed in an aqueous alkaline solution of tin salt is dissolved, adding an aqueous solution of an indium salt, tin obtained, indium, hydroxide or hydrate containing zinc in the presence of water 110 to 300 ℃ heat treatment at a temperature range of. Then filtered, dried, heat treated at a temperature range of 300 to 1000 ° C. in air, and further subjected to reduction treatment at a temperature range of 150 to 400 ° C. in a reducing atmosphere zinc oxide - a tin-containing indium oxide composite particles . Thus, zinc oxide is in the range of 100nm average particle diameter 5nm particles - obtained tin-containing indium oxide composite particles. The resulting zinc oxide - tin-containing indium oxide composite particles are suitable for forming a transparent conductive coating film having both ultraviolet shielding properties.