CN113354448A - 食品级象牙玉质岩板及制备方法 - Google Patents
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Abstract
本发明涉及岩板生产领域,公开了食品级象牙玉质岩板及制备方法。食品级象牙玉质岩板包括自上而下依次设置的象牙玉质保护釉、图案层、象牙玉质釉和玉质坯。通过象牙玉质釉和象牙玉质保护釉的设置,釉层中存在大量针状或柱状钙长石晶体,析晶均匀,呈网状交织,布满整个砖面,使得光线产生漫反射,形成细腻糅合的亮光层次感;整体横切面质感白皙、抛光性能良好,玉质微透明;烧成温度范围好,利于烧成;选材确保了重金属含量和放射性低,安全性能高,可在表面加工食材而不影响食材的安全性。
Description
技术领域
本发明涉及陶瓷岩板生产领域,特别涉及食品级象牙玉质岩板及制备方法。
背景技术
象牙玉不是象牙制品,而是玉石的一种,常被用来制作象牙玉手串,手镯,挂件,摆件等。因其颜色如象牙一般白皙,故此得名。象牙玉是产自我国西藏藏东地区的一种菱镁石岩,地矿学名称叫硅质碳酸镁,但又不同于一般的菱镁石岩,呈现致密块状,隐晶质结构,色彩纯正无瑕,色白、浅黄、黄色,抛光性能良好,玉质微透明,朴实中透出高洁,是雕刻工艺品的佳材。西藏象牙玉于十年前被发现并采集于少量标本加工成工艺品,其色白如象牙(乳白)。
随着陶瓷岩板的发展,对岩板外观要求越来越高,特别是针对高端岩板领域,颜色、质地感、安全性都是用户挑选的重要的参考因素。
本申请所要解决的技术问题为:如何提供一种象牙玉样式且安全性高的陶瓷岩板。
发明内容
本发明的目的是提供一种安全性高,颜色质地如象牙玉的食品级象牙玉质岩板及制备方法。
为实现上述目的,本发明采用如下技术方案,食品级象牙玉质岩板及制备方法,包括自上而下依次设置的象牙玉质保护釉、图案层、象牙玉质釉和玉质坯,象牙玉质釉包括如下以质量百分比计的成分:
钾长石20.0~25.0%,钙长石10.0~15.0%,超白高岭土5.0~10.0%,碳酸钡8.0~13.0%,煅烧滑石8.0~12.0%,白云石3.0~6.0%,方解石3.0~6.0%,高纯度石英粉8.0~15.0%,硅铝粉5.0~10.0%,煅烧高岭土4.0~8.0%,精选硅酸锆6.0~10.0%。
在一些实施方式中,玉质坯包括如下以质量百分比计的成分:
钾钠砂15.0~20.0%,超白高岭土:3.0~8.0%,石英砂:15.0~20.0%,水洗黑泥12.0~18.0%,硅灰石10.0~15.0%,膨润土2.0~3.0%,烧滑石2.0~3.0%,超白水磨料15.0~20.0%,镁质土10.0~15.0%,萤石矿粉6~8%。
在一些实施方式中,象牙玉质保护釉包括如下以质量百分比计的成分:
钾长石50.0~60.0%,白刚玉3.0~6.0%,超白高岭土5.0~10.0%,高纯度石英粉15.0~20.0%,碳酸钡5.0~10.0%,硅铝粉3.0~6.0%,氧化锌1.0~2.0%。
在一些实施方式中,玉质坯的化学组成包括如下质量百分比计的成分:
SiO2:62.0~69.0%、Al2O3:19.0~24.0%、Fe2O3:0.01~0.10%、TiO2:0.01~0.10%、CaO:0.10~0.6%、MgO:0.1~0.8%、K2O:2.0~5.0%、Na2O:1.0~4.0%,烧失:5.0~6.0%。
在一些实施方式中,象牙玉质保护釉的化学组成包括如下质量百分比计的成分:
SiO2:46.0~52.0%、Al2O3:14.0~20.0%、Fe2O3:0.01~0.1%、TiO2:0.01~0.08%、CaO:6.0~10.0%、MgO:2.0~6.0%、K2O:3.0~5.0%、Na2O:1.0~3.0%、ZnO:0.5~2.0%、BaO:2.0~5.0%,烧失:6.0~10.0%。
在一些实施方式中,象牙玉质保护釉的厚度为0.02~0.1mm。
食品级象牙玉质岩板制备方法,用于制备食品级象牙玉质岩板,包括如下步骤:
S1、对制备原料进行铅、铬含量及放射性检测,选用铅、铬含量分别≤1.0mg/L且放射性≤0.13μSv/h的原料;
S2、按玉质坯原料配比将S1选用原料球磨制浆、喷雾造粒并压制成型制得玉质坯;
S3、在玉质坯表面布施象牙玉质釉;
S4、在象牙玉质釉表面喷墨打印图案;
S5、布施象牙玉质保护釉;
S6、烧成。
在一些实施方式中,步骤S3中,象牙玉质釉的施釉比重为1.5~1.6,施釉量为200~250g/㎡。
在一些实施方式中,步骤S5中,象牙玉质保护釉的施釉比重为1.2~1.3,施釉量为80~120g/㎡。
在一些实施方式中,步骤S6中,烧成温度为1180~1220℃,烧成周期为65~90min。
本发明的有益效果为:本发明食品级象牙玉质岩板及制备方法,通过象牙玉质釉和象牙玉质保护釉的设置,釉层中存在大量针状或柱状钙长石晶体,析晶均匀,呈网状交织,布满整个砖面,使得光线产生漫反射,形成细腻糅合的亮光层次感;整体横切面质感白皙、抛光性能良好,玉质微透明;烧成温度范围好,利于烧成;选材确保了重金属含量和放射性低,安全性能高,可在表面加工食材而不影响食材的安全性。
附图说明
图1为本发明食品级象牙玉质岩板的结构示意图;
图2为本发明食品级象牙玉质岩板制备方法的流程示意图;
图3为本发明实施例玉质坯在窑炉中烧成的温度曲线示意图;
图4为本发明实施例象牙玉质保护釉的熔融温度图像;
图5为本发明釉层中的光学现象分析示意图。
具体实施方式
下面结合附图对本发明作进一步详细的说明。
实施例
如图1所示,食品级象牙玉质岩板,包括自上而下依次设置的象牙玉质保护釉、图案层、象牙玉质釉和玉质坯。
如图2所示,食品级象牙玉质岩板制备方法包括如下步骤:
S1、对制备原料进行铅、铬含量及放射性检测,选用铅、铬含量分别≤1.0mg/L且放射性≤0.13μSv/h的原料;
S2、按玉质坯原料配比将S1选用原料球磨制浆、喷雾造粒并压制成型制得玉质坯;
S3、在玉质坯表面布施象牙玉质釉;
S4、在象牙玉质釉表面喷墨打印图案;
S5、布施象牙玉质保护釉;
S6、烧成。
其中,玉质坯包括如下以质量百分比计的矿物组成成分:
钾钠砂15.0~20.0%,超白高岭土:3.0~8.0%,石英砂:15.0~20.0%,水洗黑泥12.0~18.0%,硅灰石10.0~15.0%,膨润土2.0~3.0%,烧滑石2.0~3.0%,超白水磨料15.0~20.0%,镁质土10.0~15.0%,萤石矿粉6~8%。
玉质坯的化学成分为:
SiO2:62.0~69.0%、Al2O3:19.0~24.0%、Fe2O3:0.01~0.10%、TiO2:0.01~0.10%、CaO:0.10~0.6%、MgO:0.1~0.8%、K2O:2.0~5.0%、Na2O:1.0~4.0%,烧失:5.0~6.0%。
本实施例中,玉质坯烧成温度为1193℃,烧成时间68min,经烧成后检测产品吸水率≤0.5%,坯体收缩率为7.1%,坯体的烧结性能良好,具体烧成温度曲线如图3所示。
在玉质坯的原料检测中,各原料重金属含量和放射性的检测如下表所示:
上表数据中,玉质坯的全部原料以及玉质坯坯体都符合国际重金属含量标准,放射性检测也符合国际放射性标准。
玉质坯坯料生产的具体工艺参数如下:
制粉工艺:泥浆比重:1.69~1.71;
球磨细度:0.8~1.0%(250目筛余);
颗粒级配:30目上:5~20%;
30~60目:≥64%;
60~80目:≤12%;
80目下:≤6%;
粉料水分:7.2~8.6%;
成型工艺:压机品牌:摩德娜;
成型压力:16800bar;
压制周期:3.2次/min(1200×2400mm规格);
干燥工艺:干燥温度:140℃;
干燥时间:60min;
干燥坯体水分:≤0.5%。
玉质坯呈致密块状,色彩纯正无瑕,色白、玉质微透明,可见光透射率为4.50~6.50%,其膨胀系数如下表所示:
象牙玉质釉包括如下以质量百分比计的成分:
钾长石20.0~25.0%,钙长石10.0~15.0%,超白高岭土5.0~10.0%,碳酸钡8.0~13.0%,煅烧滑石8.0~12.0%,白云石3.0~6.0%,方解石3.0~6.0%,高纯度石英粉8.0~15.0%,硅铝粉5.0~10.0%,煅烧高岭土4.0~8.0%,精选硅酸锆6.0~10.0%。
象牙玉质釉的化学成分含量和性能指标:SiO2:50.0~58.0%、Al2O3:18.0~24.0%、Fe2O3:0.01~0.1%、TiO2:0.01~0.08%、CaO:4.0~8.0%、MgO:2.0~6.0%、K2O:3.0~6.0%、Na2O:0.5~2.5%、ZnO:0.5~3.0%、BaO:3.0~6.5%,烧失:4.0~8.0%。
象牙玉质釉的施釉比重为1.5~1.6,施釉量为200~250g/㎡。
象牙玉质釉原材料的金属含量和放射性监测情况如下表所示:
由上表数据显示,象牙玉质釉的全部原料都符合国际重金属含量标准,放射性检测也符合国际放射性标准。
象牙玉质保护釉包括如下以质量百分比计的成分:
钾长石50.0~60.0%,白刚玉3.0~6.0%,超白高岭土5.0~10.0%,高纯度石英粉15.0~20.0%,碳酸钡5.0~10.0%,硅铝粉3.0~6.0%,氧化锌1.0~2.0%。
象牙玉质保护釉的化学组成包括如下质量百分比计的成分:
SiO2:46.0~52.0%、Al2O3:14.0~20.0%、Fe2O3:0.01~0.1%、TiO2:0.01~0.08%、CaO:6.0~10.0%、MgO:2.0~6.0%、K2O:3.0~5.0%、Na2O:1.0~3.0%、ZnO:0.5~2.0%、BaO:2.0~5.0%,烧失:6.0~10.0%。
象牙玉质保护釉的厚度为0.02~0.1mm。
象牙玉质保护釉既要保护图案层不被破坏又要有较好的透明性.同时要具有一定的耐磨效果,手感细腻,烧成范围宽,烧后光泽度在30-40度之间。
如图4所示,为象牙玉质保护釉的熔融温度范围示意图,釉料从1131℃开始出现熔融、1231℃完全熔融,熔融范围宽(约100℃),利于烧成。
如图5所示,经烧成使釉层析出大量针状或柱状钙长石晶体,析晶均匀,呈网状交织,布满整个砖面,会使光线产生漫反射,形成细腻柔和的亮光层次感。
象牙玉质保护釉的施釉比重为1.2~1.3,施釉量为80~120g/㎡。
经监测,象牙玉质保护釉的耐磨度达到四级(6000转)。
象牙玉质保护釉各原料的金属含量和放射性检测情况如下表所示:
由上表数据显示,象牙玉质保护釉的全部原料都符合国际重金属含量标准,放射性检测也符合国际放射性标准。
象牙玉质保护釉的特点是集仿古产品和柔抛光产品的优点于一体,横切面纵切面质感白皙、细腻如婴儿皮肤般柔和,抛光性能良好,玉质微透明。
釉面细腻平整、图案清晰、耐磨性好、防污性能优异,象牙玉质保护釉耐高温、耐磨、透明度高。
象牙玉质保护釉的膨胀系数如下表所示:
本发明制得的食品级象牙玉质岩板经湘潭市仪表有限公司数显陶瓷抗折仪SEZ检测,该岩板抗折强度为41MPa,经佛山市华阳仪器有限公司HYK型抗磨仪检测,该岩板釉面的耐磨度达到4级。
本申请食品级象牙玉质岩板,岩板中不含对人体有危害的重金属、放射性以及腐蚀性等的化学品,可以用来在其表面加工食品而不影响食品的安全性。
以上所述的仅是本发明的一些实施方式。对于本领域的普通技术人员来说,在不脱离本发明创造构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。
Claims (10)
1.食品级象牙玉质岩板,其特征在于,包括自上而下依次设置的象牙玉质保护釉、图案层、象牙玉质釉和玉质坯,所述象牙玉质釉包括如下以质量百分比计的成分:
钾长石20.0~25.0%,钙长石10.0~15.0%,超白高岭土5.0~10.0%,碳酸钡8.0~13.0%,煅烧滑石8.0~12.0%,白云石3.0~6.0%,方解石3.0~6.0%,高纯度石英粉8.0~15.0%,硅铝粉5.0~10.0%,煅烧高岭土4.0~8.0%,精选硅酸锆6.0~10.0%。
2.根据权利要求1所述的食品级象牙玉质岩板,其特征在于,所述玉质坯包括如下以质量百分比计的成分:
钾钠砂15.0~20.0%,超白高岭土:3.0~8.0%,石英砂:15.0~20.0%,水洗黑泥12.0~18.0%,硅灰石10.0~15.0%,膨润土2.0~3.0%,烧滑石2.0~3.0%,超白水磨料15.0~20.0%,镁质土10.0~15.0%,萤石矿粉6~8%。
3.根据权利要求1所述的食品级象牙玉质岩板,其特征在于,所述象牙玉质保护釉包括如下以质量百分比计的成分:
钾长石50.0~60.0%,白刚玉3.0~6.0%,超白高岭土5.0~10.0%,高纯度石英粉15.0~20.0%,碳酸钡5.0~10.0%,硅铝粉3.0~6.0%,氧化锌1.0~2.0%。
4.根据权利要求2所述的食品级象牙玉质岩板,其特征在于,所述玉质坯的化学组成包括如下质量百分比计的成分:
SiO2:62.0~69.0%、Al2O3:19.0~24.0%、Fe2O3:0.01~0.10%、TiO2:0.01~0.10%、CaO:0.10~0.6%、MgO:0.1~0.8%、K2O:2.0~5.0%、Na2O:1.0~4.0%,烧失:5.0~6.0%。
5.根据权利要求3所述的食品级象牙玉质岩板,其特征在于,所述象牙玉质保护釉的化学组成包括如下质量百分比计的成分:
SiO2:46.0~52.0%、Al2O3:14.0~20.0%、Fe2O3:0.01~0.1%、TiO2:0.01~0.08%、CaO:6.0~10.0%、MgO:2.0~6.0%、K2O:3.0~5.0%、Na2O:1.0~3.0%、ZnO:0.5~2.0%、BaO:2.0~5.0%,烧失:6.0~10.0%。
6.根据权利要求3所述的食品级象牙玉质岩板,其特征在于,所述象牙玉质保护釉的厚度为0.02~0.1mm。
7.食品级象牙玉质岩板制备方法,用于制备如权利要求1至6任一项所述的食品级象牙玉质岩板,其特征在于,包括如下步骤:
S1、对制备原料进行铅、铬含量及放射性检测,选用铅、铬含量分别≤1.0mg/L且放射性≤0.13μSv/h的原料;
S2、按玉质坯原料配比将S1选用原料球磨制浆、喷雾造粒并压制成型制得玉质坯;
S3、在玉质坯表面布施象牙玉质釉;
S4、在象牙玉质釉表面喷墨打印图案;
S5、布施象牙玉质保护釉;
S6、烧成。
8.根据权利要求7所述的食品级象牙玉质岩板制备方法,其特征在于,所述步骤S3中,所述象牙玉质釉的施釉比重为1.5~1.6,施釉量为200~250g/㎡。
9.根据权利要求7所述的食品级象牙玉质岩板制备方法,其特征在于,所述步骤S5中,所述象牙玉质保护釉的施釉比重为1.2~1.3,施釉量为80~120g/㎡。
10.根据权利要求7所述的食品级象牙玉质岩板制备方法,其特征在于,所述步骤S6中,烧成温度为1180~1220℃,烧成周期为65~90min。
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