CN113860854A - 一种抗菌性能稳定持久的陶瓷板及其制备方法 - Google Patents
一种抗菌性能稳定持久的陶瓷板及其制备方法 Download PDFInfo
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Abstract
本发明公开一种抗菌性能稳定持久的陶瓷板及其制备方法。所述制备方法包括以下步骤:利用陶瓷基料压制成坯体;在坯体表面施抗菌面釉;在施抗菌面釉后的坯体表面喷墨打印设计图案;在喷墨打印设计图案后的坯体表面施抗菌抛釉;将施抗菌抛釉后的坯体烧成并抛光;对抛光后的陶瓷板进行纳米抗菌材料填充处理,得到所述抗菌性能稳定持久的陶瓷板。所述制备方法能够解决目前抗菌陶瓷的抗菌效果不理想和抗菌性能不稳定持久的缺陷。
Description
技术领域
本发明属于建筑陶瓷技术领域,具体涉及一种抗菌性能稳定持久的陶瓷板及其制备方法。
背景技术
瓷砖是一种居家常见的装饰材料,由于易打理、色彩图案丰富、美观高雅的特点,越来越得到人们的喜爱和关注。随着现代经济与技术的飞速发展,人们要求瓷砖具有更多的功能性以满足日益增长的物质文化需求。抗菌陶瓷板作为将抗菌技术与陶瓷板生产技术相结合的产物,这一新型功能性陶瓷板正在逐步得到市场的青睐。
目前市面上的抗菌陶瓷产品主要集中在以下两类:(1)向釉料或抛光蜡水中添加金属离子抗菌。通过负载剂缓释或表面吸附的金属离子如银、锌与细菌细胞膜以及代谢蛋白作用破坏细菌正常代谢活动来灭杀抗菌;(2)瓷砖表面形成光催化抗菌层抗菌。典型的是利用纳米二氧化钛在光照条件下吸附空气中的水氧分子,形成活性极强的离子与细菌反应而对细菌起到破坏作用来实现细菌。但上述两种抗菌方式皆存在一定的局限。例如,金属离子通常是加到釉料中,在高温烧成条件下抗菌离子或高温氧化或参与形成其他物相而使得抗菌效果大打折扣;缓释的抗菌离子难以均匀分布于瓷砖表面,造成瓷砖表面不同位置的抗菌效果不一致,导致抗菌检测结果的波动,给稳定生产带来极大阻碍;抗菌蜡水涂覆于瓷砖表面,与外部环境直接接触,在经过一段时间的踩踏、摩擦后,抗菌性能会受到较大影响;光催化抗菌产品需要在紫外灯照射下才能表现出显著的抗菌特性,自然光及日光灯下则难以达到理想的抗菌效果。
发明内容
针对现有技术存在的上述问题,本发明提供一种抗菌性能稳定持久的陶瓷板及其制备方法以解决目前抗菌陶瓷的抗菌效果不理想和抗菌性能不稳定持久的缺陷。
第一方面,本发明提供一种抗菌性能稳定持久的陶瓷板的制备方法。所述制备方法包括以下步骤:
利用陶瓷基料压制成坯体;
在坯体表面施抗菌面釉;
在施抗菌面釉后的坯体表面喷墨打印设计图案;
在喷墨打印设计图案后的坯体表面施抗菌抛釉;
将施抗菌抛釉后的坯体烧成并抛光;
对抛光后的陶瓷板进行纳米抗菌材料填充处理,得到所述抗菌性能稳定持久的陶瓷板。
较佳地,所述抗菌面釉的原料组成包括:以质量百分比计,银锌复合抗菌剂1~3%,稀土金属氧化物0.5~2.0%,悬浮剂0.1~0.35%,解胶剂0.15~0.45%,水50~55%,余量为基础面釉。
较佳地,所述抗菌面釉的施加方式为喷釉;抗菌面釉的比重为1.50~1.65g/cm3,流速为30~50s,施釉量为45~60g/cm2。
较佳地,所述抗菌抛釉的原料组成包括:以质量百分比计,银锌复合抗菌剂3~5%,悬浮剂0.15~0.45%,解胶剂0.2~0.5%,水45~55%,余量为基础抛釉。
较佳地,所述抗菌抛釉的施加方式为喷釉;抗菌抛釉的比重为1.45~1.60g/cm3,流速为35~60s,施釉量为70~85g/cm2。
较佳地,所述填充处理为使用纳米抗菌填充材料进行抗菌蜡水超洁亮处理;所述纳米抗菌填充材料由纳米氧化锌分散液和超洁亮蜡水组成;纳米氧化锌分散液占纳米抗菌填充材料的3~8wt%。
较佳地,纳米氧化锌分散液为纳米氧化锌在水相介质中的分散液;纳米氧化锌占分散液的1.5~5wt%;所述纳米氧化锌的粒径为20~40nm。
较佳地,纳米抗菌填充材料在陶瓷板表面的涂覆量为10~25g/m2。
较佳地,所述陶瓷基料的原料组成包括:以质量百分比计,煅烧高岭土15~22%,水洗泥12~17%,石英砂18~25%,钾砂2~6%,硅灰石2.5~4.5%,钾钠长石15~21%,烧滑石3~8%,精品泥1~5%,膨润土1~5%,稀土氧化物2~4%,悬浮剂0.1~0.4%,解胶剂0.25~0.45%;所述稀土氧化物为La2O3、CeO2及Sm2O3中的至少一种。
第二方面,本发明提供上述任一项所述的制备方法获得的抗菌性能稳定持久的陶瓷板。所述陶瓷板对大肠杆菌和金黄色葡萄球菌的抗菌率为99%以上;用质量分数5%的次氯酸钠消毒液刷洗陶瓷板表面500次后,所述陶瓷板对大肠杆菌和金黄色葡萄球菌的抗菌率保持在99%以上。
附图说明
图1为本发明抗菌性能稳定持久的陶瓷板的结构示意图,1-抗菌材料填充层,2-抗菌抛釉层,3-喷墨打印层,4-抗菌面釉层,5-陶瓷板基体层。
具体实施方式
通过下述实施方式进一步说明本发明,应理解,下述实施方式仅用于说明本发明,而非限制本发明。在没有特殊说明的情况下,各百分含量指质量百分含量。
以下结合图1示例性说明本发明所述抗菌性能稳定持久的陶瓷板的制备方法。
利用陶瓷基料压制成坯体(也可以称为“陶瓷板基体层”)。所述陶瓷基料的原料组成可包括:煅烧高岭土15~22%,水洗泥12~17%,石英砂18~25%,钾砂2~6%,硅灰石2.5~4.5%,钾钠长石15~21%,烧滑石3~8%,精品泥1~5%,膨润土1~5%,稀土氧化物2~4%,悬浮剂0.1~0.4%,解胶剂0.25~0.45%。所述稀土氧化物为La2O3、CeO2及Sm2O3中的一种。泥类原料提供良好的塑性便于坯体成型并使坯体具备一定强度,减少坯体破损率。砂类脊性原料构成坯体的骨架,并在干燥及烧成过程中减少坯体收缩。长石类原料作为熔剂能够降低坯体的烧成温度,并具备较宽的熔融温度范围。稀土氧化物的加入使坯体具备一定远红外辐射性能。该远红外辐射与抗菌离子的协同作用使得坯体的抗菌效果更显著且长久。
将坯体干燥。采用干燥窑干燥。所述干燥时间可为57~78min。干燥后坯体的水分控制在0.45wt%以内。
在干燥后的坯体表面施抗菌面釉形成抗菌面釉层。所述抗菌面釉的作用是遮盖坯体底色和瑕疵,为喷墨打印层提供合适的场所,通过抗菌成分从面釉层的溶出以及稀土金属氧化物的红外辐射作用而为赋予陶瓷板优异的抗菌效果及抗菌稳定性提供基础。所述抗菌面釉的原料组成包括:以质量百分比计,银锌复合抗菌剂1~3%,稀土金属氧化物0.5~2.0%,悬浮剂0.1~0.35%,解胶剂0.15~0.45%,水50~55%,余量为基础面釉。所述银锌复合抗菌剂的粒径为200~350nm。所述稀土金属氧化物为La2O3、CeO2、Sm2O3、Nd2O3中的一种或几种的混合物。
所述基础面釉的化学组成不受限制,采用本领域常用的基础面釉即可。例如,所述基础面釉的化学组成可包括,以质量百分比计:IL:1.55~2.76%;SiO2:54.74~62.16%;Al2O3:24.52~30.15%;Fe2O3:0.18~0.35%;TiO2:0.02~0.05%;CaO:2.45~3.68%;MgO:0.13~0.32%;K2O:4.68~6.18%;Na2O:2.75~4.15%;ZrO2:0.02~0.05%;Rb2O:0.02~0.06%。
所述抗菌面釉的制备方法如下:将银锌复合抗菌剂、稀土金属氧化物、悬浮剂、解胶剂、基础面釉混合均匀,加水球磨8~10h,过筛,得到所述抗菌面釉。所述悬浮剂为羧甲基纤维素、聚乙烯醇中的至少一种。所述解胶剂为三聚磷酸钠、偏硅酸钠中的至少一种。所述抗菌面釉过325目网的筛余量为1.8~2.5wt%。
所述抗菌面釉的施加方式可为喷釉。抗菌面釉的比重为1.50~1.65g/cm3,流速为30~50s,施釉量为45~60g/cm2。流速杯的杯口内径为68mm,外径为75mm。
在施抗菌面釉后的坯体表面喷墨打印设计图案形成喷墨打印层。喷墨打印设计图案的纹理和颜色根据版面设计效果作适应性变化。例如在施抗菌面釉后的坯体表面喷墨打印上色彩丰富、纹理鲜明的图案。
在喷墨打印设计图案后的坯体表面施抗菌(保护)抛釉形成抗菌抛釉层。所述抗菌抛釉的原料组成包括:以质量百分比计,银锌复合抗菌剂3~5%,悬浮剂0.15~0.45%,解胶剂0.2~0.5%,水45~55%,余量为基础抛釉。所述银锌复合抗菌剂的粒径为200~350nm。
所述基础抛釉的化学组成不受限制,采用本领域常用的基础抛釉即可。例如,所述基础抛釉的化学组成可包括,以质量百分比计:IL:7.52~9.16%;SiO2:40.25~50.62%;Al2O3:13.75~16.86%;Fe2O3:0.15~0.28%;TiO2:0.12~0.20%;CaO:4.15~5.25%;MgO:4.12~5.32%;K2O:1.20~2.25%;Na2O:2.85~4.20%;BaO:4.52~6.50%;ZnO:2.15~3.80%;SrO:2.25~3.20%;P2O5:0.03~0.08%。
所述抗菌抛釉的制备方法如下:将银锌复合抗菌剂、悬浮剂、解胶剂、基础抛釉混合均匀,加水球磨6~8h,过筛,得到所述抗菌抛釉。所述悬浮剂为羧甲基纤维素、聚乙烯醇中的至少一种。所述解胶剂为三聚磷酸钠、偏硅酸钠中的至少一种。所述抗菌面釉过325目网的筛余量为2.0~2.4wt%。
所述抗菌抛釉的施加方式可为喷釉。抗菌抛釉的比重为1.45~1.60g/cm3,流速为35~60s,施釉量为70~85g/cm2。
将施抗菌抛釉后的坯体烧成。可入窑烧成。最高烧成温度为1180~1220℃,烧成周期为68~85min。
将烧成后的陶瓷板抛光、磨边。对抛光后的陶瓷板进行抗菌蜡水超洁亮处理,得到所述抗菌性能稳定持久的陶瓷板。
使用纳米抗菌填充材料进行抗菌蜡水超洁亮处理形成抗菌材料填充层。所述纳米抗菌填充材料由纳米氧化锌分散液和超洁亮蜡水组成。纳米氧化锌分散液占纳米抗菌填充材料的3~8wt%。超洁亮蜡水的组成为本领域常规手段,可通过商业化的途径购得。纳米氧化锌分散液为纳米氧化锌在水相介质(例如水)中的分散液。纳米氧化锌占分散液的1.5~5wt%。所述纳米氧化锌的粒径为20~40nm。使用纳米抗菌填充材料进行抗菌蜡水超洁亮处理的目的是在陶瓷板的表层微孔中填充更加细小的氧化锌粒子以达到较好的抗菌效果。
纳米抗菌填充材料的制备方法如下:将纳米氧化锌超声波分散成液质均一的分散液,将分散液与超洁亮蜡水混合均匀得到所述纳米抗菌填充材料。
纳米抗菌填充材料在陶瓷板表面的涂覆量为10~25g/m2。,涂覆量少则难以达到99%以上的抗菌率;涂覆量过多,抗菌率已达上限,且成本增加。
所述抗菌性能稳定持久的陶瓷板从上至下包括纳米抗菌材料填充层、抗菌抛釉层、喷墨打印层、抗菌面釉层、陶瓷板基体层。
根据本发明所述制备方法获得的抗菌陶瓷板在保持陶瓷板物化性能的基础上附加优异的抗菌特性,抗菌离子从抗菌剂改性的超洁亮抛光蜡中或抗菌釉料中溶出,能够和吸附在陶瓷板表面的细菌充分接触,使得陶瓷板产品对大肠杆菌和金黄色葡萄球球菌的抗菌率达99%以上。
另外,在填充纳米抗菌填充材料的过程中,通过毛毡和陶瓷板表面之间的摩擦将纳米抗菌材料填充进入陶瓷板表面经抛光露出的微气孔中,使得抗菌离子能够均匀分布在陶瓷板表面。陶瓷板表面的抗菌材料填充层经过一段时间的磨损后,釉料中的抗菌离子可以溶出,对损耗部分做出补充,保证了抗菌性能的稳定与持久特性。多次重复测试后,陶瓷板的抗菌率可以长期稳定在95%以上,抗菌耐久性也达90%以上。
仅在瓷砖表面微孔中填充抗菌材料,表层磨损后抗菌成分会有一定程度的损失,釉层磨损后,没有来自釉层以下抗菌成分的析出补充,抗菌耐久性得不到保障。仅在抗菌釉层中引入抗菌成分,抗菌组分需要从釉层中析出到表面与细菌接触作用才能表现抗菌效果,而抗菌离子溶出缓慢,同样无法保证析出的抗菌离子均匀分散于瓷砖表面。本发明对坯体层、面釉层、抛釉层以及表面微孔都做抗菌功能化处理,在表面的釉层磨损后,来自面釉层的抗菌成分会析出补充,加上稀土氧化物的红外辐射作用,使得抗菌瓷砖在保证抗菌性能优异的同时也具备良好的抗菌耐久性。
下面进一步例举实施例以详细说明本发明。同样应理解,以下实施例只用于对本发明进行进一步说明,不能理解为对本发明保护范围的限制,本领域的技术人员根据本发明的上述内容作出的一些非本质的改进和调整均属于本发明的保护范围。下述示例具体的工艺参数等也仅是合适范围中的一个示例,即本领域技术人员可以通过本文的说明做合适的范围内选择,而并非要限定于下文示例的具体数值。
实施例1
抗菌稳定持久的陶瓷板的制备方法包括如下步骤:
S1.制备陶瓷板坯体并在表面均匀喷施抗菌面釉;按质量百分比将银锌复合抗菌剂1.5%,稀土金属氧化La2O3 1.0%,羧甲基纤维素0.2%,三聚磷酸钠0.3%,分别加入到47%的基础面釉中混合均匀,并加入50%的水球磨8h,得到比重1.55g/cm3、流速40s、筛余1.9wt%的抗菌面釉;抗菌面釉的施釉量为50g/m2;
S2.在坯体表面喷墨打印色彩丰富纹理鲜明的图案;
S3.于坯体表面继续喷施抗菌抛釉;按质量百分比将银锌复合抗菌剂3.5%,羧甲基纤维素0.2%,三聚磷酸钠0.3%,分别加入到41%的基础抛釉中混合均匀,并加入55%的水球磨8h,得到比重1.46g/cm3、流速45s、筛余2.1wt%的抗菌抛釉;抗菌抛釉的施釉量为75g/m2;
S4.将坯体入窑烧成;最高烧成温度为1190℃,烧成周期为70min;
S5.抛光、磨边、抗菌蜡水超洁亮处理;将纳米氧化锌超声波分散成液质均一的固含量为5%的分散液,将2.0%分散液与98%的超洁亮蜡水混合均匀,得到纳米抗菌填充材料;通过毛毡磨抛工艺将纳米抗菌填充材料均匀涂覆在抛光磨边后的陶瓷板表面;纳米抗菌填充材料的涂覆量为15g/m2;蜡水层固化后得到所述陶瓷板。
实施例2
抗菌稳定持久的陶瓷板的制备方法包括如下步骤:
S1.制备陶瓷板坯体并在表面均匀喷施抗菌面釉;按质量百分比将银锌复合抗菌剂2.5%,稀土金属氧化CeO2 1.5%,羧甲基纤维素0.25%,三聚磷酸钠0.35%,分别加入到45.4%的基础面釉中混合均匀,并加入50%的水球磨9h,得到比重1.52g/cm3、流速35s、筛余2.2wt%的抗菌面釉;抗菌面釉的施釉量为45g/m2;
S2.在坯体表面喷墨打印色彩丰富纹理鲜明的图案;
S3.于坯体表面继续喷施抗菌抛釉;按质量百分比将银锌复合抗菌剂5%,羧甲基纤维素0.25%,三聚磷酸钠0.4%,分别加入到42.35%的基础抛釉中混合均匀,并加入52%的水球磨7.5h,得到比重1.49g/cm3、流速40s、筛余2.3wt%的抗菌抛釉;抗菌抛釉的施釉量为80g/m2;
S4.将坯体入窑烧成;最高烧成温度为1195℃,烧成周期为70min;
S5.抛光、磨边、抗菌蜡水超洁亮处理;将纳米氧化锌超声波分散成液质均一的固含量为7%的分散液,将4%分散液与96%的超洁亮蜡水混合均匀,得到纳米抗菌填充材料;通过毛毡磨抛工艺将纳米抗菌填充材料均匀涂覆在抛光磨边后的陶瓷板表面;纳米抗菌填充材料的涂覆量为20g/m2;蜡水层固化后得到所述陶瓷板。
实施例3
抗菌稳定持久的陶瓷板的制备方法包括如下步骤:
S1.制备陶瓷板坯体并在表面均匀喷施抗菌面釉;按质量百分比将银锌复合抗菌剂3%,稀土金属氧化CeO2 1%,稀土金属氧化Sm2O3 1%,羧甲基纤维素0.35%,三聚磷酸钠0.45%,分别加入到44.2%的基础面釉中混合均匀,并加入50%的水球磨9.5h,得到比重1.63g/cm3、流速45s、筛余2.4wt%的抗菌面釉;抗菌面釉的施釉量为60g/m2;
S2.在坯体表面喷墨打印色彩丰富纹理鲜明的图案;
S3.于坯体表面继续喷施抗菌抛釉;按质量百分比将银锌复合抗菌剂4.5%,羧甲基纤维素0.15%,三聚磷酸钠0.2%,分别加入到50.15%的基础抛釉中混合均匀,并加入45%的水球磨7.5h,得到比重1.58g/cm3、流速55s、筛余2.4wt%的抗菌抛釉;抗菌抛釉的施釉量为78g/m2;
S4.将坯体入窑烧成;最高烧成温度为1210℃,烧成周期为85min;
S5.抛光、磨边、抗菌蜡水超洁亮处理;将纳米氧化锌超声波分散成液质均一的固含量为8%的分散液,将5%分散液与95%的超洁亮蜡水混合均匀,得到纳米抗菌填充材料;通过毛毡磨抛工艺将纳米抗菌填充材料均匀涂覆在抛光磨边后的陶瓷板表面;纳米抗菌填充材料的涂覆量为25g/m2;蜡水层固化后得到所述陶瓷板。
表1实施例1-3所制备的抗菌试样检测结果
抗菌率测试方法:在抗菌陶瓷板的表面分别接种大肠肝菌和金黄色葡萄球菌后检测菌落数,经培养24h后再次检测陶瓷板表面的菌落数,根据培养前后菌落数的数值计算得到抗菌率。
抗菌耐久性检测方法:模拟产品使用过程的清洁方式,将试样表面用质量分数5%的次氯酸钠消毒液反复刷洗500次后,检测洗刷后试样表面的抗菌性能。
由以上检测结果可以看出,采用本发明技术方案制备的抗菌陶瓷板的抗菌率皆达到99%以上,且抗菌耐久性良好也达到90%以上。
实施例4
本实施例与实施例1基本相同,不同之处在于:所述纳米抗菌填充材料为超洁亮蜡水,没有加入纳米氧化锌抗菌剂。
实施例5
本实施例与实施例2基本相同,不同之处在于:所用面釉为普通面釉,其组成为羧甲基纤维素0.25%,三聚磷酸钠0.35%,基础面釉49.4%,水50%。
实施例6
本实施例与实施例3基本相同,不同之处在于:所用抛釉为普通抛釉,其组成为羧甲基纤维素0.15%,三聚磷酸钠0.2%,基础抛釉52.15%,水47.5%。
表2实施例4-6的抗菌检测结果
由表2的抗菌检测结果可知:超洁亮抗菌蜡水是否加入对试样抗菌率的大小有明显影响。如实施例4所示,将超洁亮抗菌蜡水替换为普通蜡水后,与实施例2对比,抗菌率下降到90%以下,且将实施例3、实施例4分别与实施例5、实施例6对比可以看出,将抗菌面釉和抗菌抛釉的其一替换为对应普通釉料,抗菌率尽管在95%以上,但试样的抗菌耐久性下降到85%以下,无法实现持久抗菌。这是因为瓷砖在经过一段时间的使用,表面经过反复踩踏、清洗、摩擦等过程后,表层的抗菌材料填充层会有一定程度上的磨损,若没有抗菌釉料中抗菌离子的溶出补充以及稀土氧化物的红外辐射作用,瓷砖的抗菌耐久性无法得到保证。因此,抗菌面釉、抗菌抛釉、超洁亮抗菌蜡水的三重配合作用,是保证试样能够达到抗菌稳定、持久的必要前提。
实施例7
本实施例与实施例1基本相同,不同之处在于:所述抗菌面釉由银锌复合抗菌剂0.5%,稀土金属氧化La2O3 0.5%,羧甲基纤维素0.2%,三聚磷酸钠0.3%,48.5%的基础面釉及50%的水组成。
实施例8
本实施例与实施例2基本相同,不同之处在于:所述抗菌抛釉由银锌复合抗菌剂2.5%,羧甲基纤维素0.25%,三聚磷酸钠0.4%,46.85%基础抛釉与50%的水组成。
实施例9
本实施例与实施例3基本相同,不同之处在于:所述纳米抗菌材料的组成由2.5%纳米氧化锌分散液与97.5%的超洁亮蜡水混合而成。
表3实施例7-9的抗菌检测结果
由表3可知,若抗菌面釉、抗菌抛釉、纳米抗菌材料中添加的抗菌成分不在规定范围内,试样的抗菌率及抗菌耐久性均达不到较好结果。
Claims (10)
1.一种抗菌性能稳定持久的陶瓷板的制备方法,其特征在于,所述制备方法包括以下步骤:
利用陶瓷基料压制成坯体;
在坯体表面施抗菌面釉;
在施抗菌面釉后的坯体表面喷墨打印设计图案;
在喷墨打印设计图案后的坯体表面施抗菌抛釉;
将施抗菌抛釉后的坯体烧成并抛光;
对抛光后的陶瓷板进行纳米抗菌材料填充处理,得到所述抗菌性能稳定持久的陶瓷板。
2.根据权利要求1所述的制备方法,其特征在于,所述抗菌面釉的原料组成包括:以质量百分比计,银锌复合抗菌剂1~3%,稀土金属氧化物0.5~2.0%,悬浮剂0.1~0.35%,解胶剂0.15~0.45%,水50~55%,余量为基础面釉。
3.根据权利要求1或2所述的制备方法,其特征在于,所述抗菌面釉的施加方式为喷釉;抗菌面釉的比重为1.50~1.65g/cm3,流速为30~50s,施釉量为45~60g/cm2。
4.根据权利要求1至3中任一项所述的制备方法,其特征在于,所述抗菌抛釉的原料组成包括:以质量百分比计,银锌复合抗菌剂3~5%,悬浮剂0.15~0.45%,解胶剂0.2~0.5%,水45~55%,余量为基础抛釉。
5.根据权利要求1至4中任一项所述的制备方法,其特征在于,所述抗菌抛釉的施加方式为喷釉;抗菌抛釉的比重为1.45~1.60g/cm3,流速为35~60s,施釉量为70~85g/cm2。
6.根据权利要求1至5中任一项所述的制备方法,其特征在于,所述填充处理为使用纳米抗菌填充材料进行抗菌蜡水超洁亮处理;所述纳米抗菌填充材料由纳米氧化锌分散液和超洁亮蜡水组成;纳米氧化锌分散液占纳米抗菌填充材料的3~8wt%。
7.根据权利要求6所述的制备方法,其特征在于,纳米氧化锌分散液为纳米氧化锌在水相介质中的分散液;纳米氧化锌占分散液的1.5~5wt%;所述纳米氧化锌的粒径为20~40nm。
8.根据权利要求6或7所述的制备方法,其特征在于,纳米抗菌填充材料在陶瓷板表面的涂覆量为10~25g/m2。
9.根据权利要求1至8中任一项所述的制备方法,其特征在于,所述陶瓷基料的原料组成包括:以质量百分比计,煅烧高岭土15~22%,水洗泥12~17%,石英砂18~25%,钾砂2~6%,硅灰石2.5~4.5%,钾钠长石15~21%,烧滑石3~8%,精品泥1~5%,膨润土1~5%,稀土氧化物2~4%,悬浮剂0.1~0.4%,解胶剂0.25~0.45%;所述稀土氧化物为La2O3、CeO2及Sm2O3中的至少一种。
10.根据权利要求1至9中任一项所述的制备方法获得的抗菌性能稳定持久的陶瓷板,其特征在于,所述陶瓷板对大肠杆菌和金黄色葡萄球菌的抗菌率为99%以上;用质量分数5%的次氯酸钠消毒液刷洗陶瓷板表面500次后,所述陶瓷板对大肠杆菌和金黄色葡萄球菌的抗菌率保持在99%以上。
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