PROBLEM TO BE SOLVED: To provide a novel antibacterial ceramic industry product capable of obtaining efficient antibacterial property even with reducing the used amount of an antibacterial metal than conventional because utilization efficiency of the antibacterial metal is high, and to provide a ceramic industry surface treatment agent capable of being used for manufacturing the antibacterial ceramic industry product and a manufacturing method of the antibacterial ceramic industry product using the ceramic industry surface treatment agent.SOLUTION: There is provided an antibacterial ceramic industry product having metal nanoparticles having an average particle diameter of 200 nm or less containing at least silver on a surface. A ceramic industry surface treatment agent is obtained by colloidal dispersing metal nanoparticles having 90% cumulative diameter D90 of a particle size distribution of 150 nm or less in a dispersion. A manufacturing method includes firing at 800 to 1600°C after applying the ceramic industry surface treatment agent to the surface of the ceramic industry product.COPYRIGHT: (C)2014,JPO&INPIT【課題】抗菌性金属の利用効率が高いため、前記抗菌性金属の使用量を、現状より少なくしても、十分な抗菌性を得ることができる、新規な抗菌性窯業製品と、前記抗菌性窯業製品を製造するために用いることができる窯業表面処理剤と、前記窯業表面処理剤を用いた抗菌性窯業製品の製造方法とを提供する。【解決手段】抗菌性窯業製品は、表面に、少なくとも銀を含む、平均粒子径200nm以下の金属ナノ粒子を存在させた。窯業表面処理剤は、分散媒中に、粒度分布の90%累積径D90が150nm以下である金属ナノ粒子をコロイド分散させた。製造方法は、窯業製品の表面に、前記窯業表面処理剤を塗布した後、800~1600℃で焼成する。【選択図】なし
