Antibacterial ceramic tile and preparation method thereof
The present invention discloses an antibacterial ceramic tile and a preparation method thereof. The method comprises applying an antibacterial protective glaze containing Ulan tea-quartz on the surface of a green body, and then firing to obtain an antibacterial ceramic tile. The mass percentage of Ulan tea-quartz to the antibacterial protective glaze is 35% to 45%. Controlling the mass percentage content of Ulan tea-quartz to the antibacterial protective glaze within the aforementioned range not only can achieve an excellent antibacterial property, but also avoids excessive glossiness, rough texture, or poor flatness of the ceramic glaze surface.
1 . A preparation method for an antibacterial ceramic tile, comprising:
applying an antibacterial protective glaze containing Ulan tea-quartz on a surface of a green body; and
firing to obtain an antibacterial ceramic tile, wherein
a mineral composition of the antibacterial protective glaze includes, in percentage by mass: Ulan tea-quartz: 35% to 45%, clay: 15% to 25%, Ca—Mg—Ba—Zn flux mineral: 30% to 42%, and alumina: 5% to 8%; the Ca—Mg—Ba—Zn flux mineral is flux mineral containing calcium oxide, magnesium oxide, barium oxide and zinc oxide, used to adjust a high-temperature viscosity of the antibacterial protective glaze, glossiness, and flatness of the surface; and the clay is an aluminum silicate with bonding and plasticity; and the barium oxide contained in the Ca—Mg—Ba—Zn flux mineral is added in the form of barium carbonate;
a chemical composition of the Ulan tea-quartz includes, in percentage by mass: SiO 2 : 70% to 80%, Al 2 O 3 : 10% to 15%, Fe 2 O 3 : 0.05% to 0.15%, P 2 O 5 : 0.25% to 0.35%, CaO: 0.5% to 1.0%, MgO: 0.1% to 0.3%, K 2 O: 4.0% to 6.0%, Na 2 O: 3.0% to 5.0%, La 2 O 3 : 14 ppm to 17 ppm, CeO 2 : 35 ppm to 40 ppm, Nd 2 O 3 : 9 ppm to 12 ppm, Sm 2 O 3 : 1 ppm to 3 ppm, Eu 2 O 3 : 0.3 ppm to 0.7 ppm, Gd 2 O 3 : 1 ppm to 3 ppm, Tb 4 O 7 : 0.1 ppm to 0.3 ppm, Ho 2 O 3 : 0.2 ppm to 0.3 ppm, Er 2 O 3 : 0.4 ppm to 0.7 ppm, Tm 2 O 3 : 0.05 ppm to 0.1 ppm, Yb 2 O 3 : 0.4 ppm to 0.7 ppm, Lu 2 O 3 : 0 ppm to 0.3 ppm, Y 2 O 3 : 6 ppm to 9 ppm; and loss on ignition: 0.5% to 1.0%;
a chemical composition of the antibacterial protective glaze includes, in percentage by mass: SiO 2 : 40% to 50%; Al 2 O 3 : 16% to 20%; Fe 2 O 3 : 0.21% to 0.31%; TiO 2 : 0.21% to 0.31%; CaO: 1.5% to 3.0%; MgO: 3.0% to 5.0%; BaO: 11 to 15%; ZnO: 3% to 5%; K 2 O: 2.0% to 3.0%; Na 2 O: 1.3% to 2.3%; La 2 O 3 : 4 ppm to 9 ppm; CeO 2 : 9 ppm to 20 ppm; Nd 2 O 3 : 2 ppm to 6 ppm; Sm 2 O 3 : 0.03 ppm to 1.5 ppm; Eu 2 O 3 : 0.09 ppm to 0.35 ppm; Gd 2 O 3 : 0.3 ppm to 1.5 ppm; Tb 4 O 7 : 0.03 ppm to 0.15 ppm; Ho 2 O 3 : 0.06 ppm to 0.15 ppm; Er 2 O 3 : 0.12 ppm to 0.35 ppm; Tm 2 O 3 : 0.01 ppm to 0.05 ppm; Yb 2 O 3 : 0.12 ppm to 0.35 ppm; Lu 2 O 3 : 0 ppm to 0.15 ppm; Y 2 O 3 : 1.8 ppm to 4.5 ppm; and loss on ignition: 8% to 10%, and
antibacterial rates of Escherichia coli and Staphylococcus aureus of the antibacterial ceramic tile are both greater than 90%.
2 . The preparation method according to claim 1 , wherein a method of applying the antibacterial protective glaze is glaze spraying, with a specific gravity of 1.35 g/cm 3 to 1.40 g/cm 3 and an application amount of 250 g/m 2 to 300 g/m 2 .
3 . The preparation method according to claim 1 , wherein a maximum firing temperature is 1,200° C. to 1,220° C., and a firing duration is 60 to 70 minutes.
4 . The preparation method according to claim 1 , further comprising: applying a cover glaze on the surface of the green body before applying the antibacterial protective glaze containing the Ulan tea-quartz on the surface of the green body.
5 . The preparation method according to claim 4 , wherein a chemical composition of the cover glaze includes, in percentage by mass: SiO 2 : 60% to 68%; Al 2 O 3 : 20% to 24%; alkali metal oxides: 4% to 7%; and ZrO 2 : 3.2 to 9.6%.
6 . The preparation method according to claim 4 , wherein a method of applying the cover glaze is glaze spraying, with a specific gravity of 1.40 g/cm 3 to 1.50 g/cm 3 and an application amount of 500 g/m 2 to 600 g/m 2 .