| 摘要 |
<p>PURPOSE: To obtain coated inorganic powder by coating the surface of powder of an inorganic substance with an organic thiol compound or a reaction product of the compound and an inorganic substance, hating high dispersibility in a thick film paste, capable of being readily made into a paste, excellent in printability and coating performance. CONSTITUTION: An inorganic substance such as a smoky silver powder produced by a wet method is sufficiently coated with an organic thiol compound such as octadecyl thiol by pouring the organic thiol compound, shaken and stirred for 10 minutes to give a suspension, which is allowed to stand for 8 hours to treat the surface of the inorganic substance. The suspension is decanted to separate and remove the supernatant liquid. The remaining inorganic substance powder is cleaned with hexane, etc., the inorganic substance is settled, the mixture is decanted to separate and remove the remaining organic thiol compound, the inorganic substance is dried to give the objective coated inorganic powder comprising the powder of the inorganic substance whose surface is coated with the organic thiol compound and/or the reaction product of the compound and the inorganic substance, having high dispersibility in a thick film paste, capable of being readily made into a paste.</p> |
