CN107162563A - 一种无铅无毒自释釉日用陶瓷制品 - Google Patents
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Abstract
本发明公开了一种无铅无毒自释釉日用陶瓷制品,步骤为:将高岭土、粘土、长石混合粉碎,粉碎30‑40分钟后过200目筛加入总量3‑4倍量的水球磨,球磨90‑120分钟后出料得到混合浆料;将烧滑石、氧化镁、碳酸钾、碳酸锂混合进行干法混合30‑40分钟后粉碎,过300目筛,得到改性活化剂;将混合浆料与改性活化剂混合,进行高强磁浮选3‑4次,然后将混合物进行静置沉降16‑18小时,继续加水,控制含水率为36‑38%后进行注浆成型,将成型陶瓷坯体放入烘箱中以80‑90℃干燥120‑180分钟;然后放入梭式窑升温至1280‑1300℃,保温30‑40分钟后急冷至800‑850℃,然后自然冷却至室温,即可。
Description
技术领域
本发明涉及日用陶瓷技术领域,尤其涉及一种无铅无毒自释釉日用陶瓷制品。
背景技术
按传统方法生产的有釉日用陶瓷制品,一般是在坯体表面施上一层釉料,然后通过适宜的温度与气氛烧成,使釉料在坯体表面熔融,形成一层玻璃质薄层。 施釉的目的在于改善制品的技术性质与使用性能, 并提高制品的装饰质量,增加美观。不需事先制备釉料,坯体也不施釉,只在配制坯料时添加一种或几种物质,采取一定的工艺措施,烧成后就能在坯体表面自动形成一层玻璃质的釉层,对于这种坯体不施釉,靠自身释放釉质覆盖坯体表面,称之为自释釉或自上釉的技术。 释釉工艺的最大优点在于简化了陶瓷产品传统生产过程中制釉、 施釉两大工序, 缩短了生产周期、减少了生产成本。 现有技术中已经有自释釉的研究成果,但是由于生产过程中关键工艺难以机械控制,导致制备难度高、成本高,限制了其发展,这就需要对一些工艺进行可工业化的改性,实现在生产中的推广。
发明内容
本发明目的就是为了弥补已有技术的缺陷,提供一种无铅无毒自释釉日用陶瓷制品。
本发明是通过以下技术方案实现的:
一种无铅无毒自释釉日用陶瓷制品,制备过程包括以下具体步骤:
(1)将高岭土、粘土、长石混合均匀后进行粉碎处理,粉碎30-40分钟后过200目筛后加入总量3-4倍量的水放入球墨罐中进行球磨,以氧化锆球为球磨介质,控制一定的球料比,球磨90-120分钟后出料得到混合浆料;
(2)将烧滑石、氧化镁、碳酸钾、碳酸锂按照一定的比例混合均匀,然后放入混料机中进行干法混合30-40分钟,再通过粉碎机进行粉碎,过300目筛,得到改性活化剂;
(3)将步骤(1)混合浆料与步骤(2)改性活化剂混合,进行高强磁浮选3-4次,然后将混合物进行静置沉降16-18小时,继续加入适量的水,控制含水率为36-38%后进行注浆成型,将得到的成型陶瓷坯体放入烘箱中以80-90℃干燥120-180分钟;
(4)将干燥后的陶瓷坯体放入梭式窑中,以5-8℃/min的升温速率升温至1280-1300℃,保温30-40分钟后急冷至800-850℃,然后从800-850℃自然冷却至室温,即可。
一种无铅无毒自释釉日用陶瓷制品的制备方法,步骤(1)中所述的高岭土、粘土、长石的添加量比值为35-40:15-20:25-35。
一种无铅无毒自释釉日用陶瓷制品的制备方法,步骤(1)中所述的一定的球料比是指球料比为2:1。
一种无铅无毒自释釉日用陶瓷制品的制备方法,步骤(2)中所述的烧滑石、氧化镁、碳酸钾、碳酸锂的成分配比为1:1:2:1。
一种无铅无毒自释釉日用陶瓷制品的制备方法,步骤(3)中所述的高强磁浮选的具体条件是指用磁场强度1000高斯的除铁器除铁进行磁浮选。
一种无铅无毒自释釉日用陶瓷制品的制备方法,步骤(3)中所述的步骤(1)混合浆料与步骤(2)改性活化剂混合,是按照质量比95:5的比例进行混合的。
本发明的优点是:本发明通过科学合理的成分配比将高岭土、粘土、长石通过湿法球磨得到混合浆料,通过静置、磁浮选的方式取出原料中的铁以及重金属,使陶瓷料更加细腻,避免釉层出现针孔等不良现象;通过在原料中添加适量的碳酸钾、碳酸锂等碱性活性物质,配合氧化镁等助熔剂,在注浆成型后的坯体干燥过程中,水分借助于坯体毛细管的作用力扩散渗透,从坯体内部迁移至表面时,坯体内这些可溶性碱性物质,借助于水分向上扩散的作用,而富集于坯体表面。在烧成过程中,碱性活化剂与坯体其它化学成分发生反应,生成低共熔化合物,最终在胎体表面形成一层玻璃质薄层,即釉层; 与按常规方法生产的日用瓷器基本具有同样的釉面效果,而生产工艺流程则可大为简化,生产成本也可大大降低。
本发明在制造过程中添加适量的碱性活化剂,并采取相应的工艺措施,严格控制各项工艺技术参数,可制得质量符合要求的自释釉陶瓷制品,而且免去了制釉、施釉两大生产工序,大大简化工艺流程,可减少生产设备、生产场地占用,节约原料,提高工效。
具体实施方式
一种无铅无毒自释釉日用陶瓷制品,制备过程包括以下具体步骤:
(1)将400g高岭土、200g粘土、350g长石混合均匀后进行粉碎处理,粉碎30分钟后过200目筛后加入总量3倍量的水放入球墨罐中进行球磨,以氧化锆球为球磨介质,控制一定的球料比2:1,球磨90分钟后出料得到混合浆料;
(2)将10g烧滑石、10g氧化镁、20g碳酸钾、10g碳酸锂混合均匀,然后放入混料机中进行干法混合30分钟,再通过粉碎机进行粉碎,过300目筛,得到改性活化剂;
(3)将步骤(1)混合浆料与步骤(2)改性活化剂混合,用磁场强度1000高斯的除铁器除铁进行高强磁浮选3次,然后将混合物进行静置沉降16小时,继续加入适量的水,控制含水率为36%后进行注浆成型,将得到的成型陶瓷坯体放入烘箱中以80℃干燥120分钟;
(4)将干燥后的陶瓷坯体放入梭式窑中,以5℃/min的升温速率升温至1280℃,保温30分钟后急冷至800℃,然后从800℃自然冷却至室温,即可。
Claims (6)
1.一种无铅无毒自释釉日用陶瓷制品,其特征在于,制备过程包括以下具体步骤:
(1)将高岭土、粘土、长石混合均匀后进行粉碎处理,粉碎30-40分钟后过200目筛后加入总量3-4倍量的水放入球墨罐中进行球磨,以氧化锆球为球磨介质,控制一定的球料比,球磨90-120分钟后出料得到混合浆料;
(2)将烧滑石、氧化镁、碳酸钾、碳酸锂按照一定的比例混合均匀,然后放入混料机中进行干法混合30-40分钟,再通过粉碎机进行粉碎,过300目筛,得到改性活化剂;
(3)将步骤(1)混合浆料与步骤(2)改性活化剂混合,进行高强磁浮选3-4次,然后将混合物进行静置沉降16-18小时,继续加入适量的水,控制含水率为36-38%后进行注浆成型,将得到的成型陶瓷坯体放入烘箱中以80-90℃干燥120-180分钟;
(4)将干燥后的陶瓷坯体放入梭式窑中,以5-8℃/min的升温速率升温至1280-1300℃,保温30-40分钟后急冷至800-850℃,然后从800-850℃自然冷却至室温,即可。
2.根据权利要求1所述的一种无铅无毒自释釉日用陶瓷制品的制备方法,其特征在于,步骤(1)中所述的高岭土、粘土、长石的添加量比值为35-40:15-20:25-35。
3.根据权利要求1所述的一种无铅无毒自释釉日用陶瓷制品的制备方法,其特征在于,步骤(1)中所述的一定的球料比是指球料比为2:1。
4.根据权利要求1所述的一种无铅无毒自释釉日用陶瓷制品的制备方法,其特征在于,步骤(2)中所述的烧滑石、氧化镁、碳酸钾、碳酸锂的成分配比为1:1:2:1。
5.根据权利要求1所述的一种无铅无毒自释釉日用陶瓷制品的制备方法,其特征在于,步骤(3)中所述的高强磁浮选的具体条件是指用磁场强度1000高斯的除铁器除铁进行磁浮选。
6.根据权利要求1所述的一种无铅无毒自释釉日用陶瓷制品的制备方法,其特征在于,步骤(3)中所述的步骤(1)混合浆料与步骤(2)改性活化剂混合,是按照质量比95:5的比例进行混合的。
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CN111825428A (zh) * | 2020-08-05 | 2020-10-27 | 景德镇陶瓷大学 | 一种自释釉陶瓷及其制备方法 |
CN113651606A (zh) * | 2021-09-17 | 2021-11-16 | 景德镇陶瓷大学 | 一种适用于低膨胀陶瓷炊具的保健功能型自释釉陶瓷及其制备方法 |
CN113651606B (zh) * | 2021-09-17 | 2022-12-02 | 景德镇陶瓷大学 | 一种适用于低膨胀陶瓷炊具的保健功能型自释釉陶瓷及其制备方法 |
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