CN108383497A - 大型坭兴陶板的制备方法 - Google Patents
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Abstract
本发明提供了大型坭兴陶板的制备方法,包括制备坯料、坯体成型、坯体干燥和烧制坯体,所述制备坯料是将东泥40~60重量份、西泥60~40重量份、ZnO 4~8重量份、K2CO3 0.02~0.04重量份混合,按常规方法制成坯料。本发明在坭兴陶坯料中添加ZnO和K2CO3能大大提高坯体中莫来石网络结构的强度,可以有效降低裂纹的出现,提高烧成率。
Description
技术领域
本发明涉及坭兴陶的制作工艺,具体涉及大型坭兴陶板的制备方法。
背景技术
钦州坭兴陶与江苏宜兴紫砂陶、云南建水陶、四川荣昌陶名列中国四大名陶,饮誉中外。坭兴陶是将钦州地区特有的东泥和西泥为原料,经过风化、球磨、压滤、真空练泥、陈腐后制成坯料,然后经成型、干燥、烧制等工艺制成。坭兴陶板是一种悬挂在墙壁上的装饰品,由于坭兴陶板挂饰均为大型饰品,其尺寸较一般坭兴陶器具偏大(长≥0.8m,宽≥0.6m,厚≥5cm),烧制难度较高,极易烧裂以及变形,烧成率仅为40~50%。
发明内容
本发明所要解决的技术问题是提供一种大型坭兴陶板的制备方法,该方法可以大大提高坭兴陶板的烧成率。
本发明提供的技术方案是一种大型坭兴陶板的制备方法,包括制备坯料、坯体成型、坯体干燥和烧制坯体,所述制备坯料是将东泥40~60重量份、西泥60~40重量份、ZnO 4~8重量份、K2CO3 0.02~0.04重量份混合,按常规方法制成坯料。
在坭兴陶坯料中添加K2CO3,在烧制过程中,CO3 2+能促使莫来石晶格氧空位周围的Al、Si原子进一步远离氧空位,导致晶格更加疏松,帮助ZnO进入莫来石晶体中形成固溶体,加强了莫来石网络结构的强度。ZnO的进入并分散在莫来石晶体中,起到了钉扎、缠结位错的作用,抑制了位错的滑移,限制了断裂,提高了坭兴陶坯体强度。
作为优选,各原料的重量份为:东泥60份、西泥40份、ZnO 4~8份、K2CO3 0.02~0.04份。
进一步优选地,各原料的重量份为:东泥60份、西泥40份、ZnO 6份、K2CO3 0.03份。
所述烧制坯体是将干燥坯体入窑烧制,先以每小时升高80~130℃的升温速度将温度升至550~650℃,再以每小时升高140~180℃的升温速度将温度升到1110~1160℃,并在该温度下,持续烧制0.5~1小时,冷却后出窑,完成坯体的烧制。
作为优选,将干燥坯体入窑烧制,先以每小时升高80~100℃的升温速度将温度升至600℃,再以每小时升高160~180℃的升温速度将温度升到1140℃,并在该温度下,持续烧制0.5~1小时,冷却后出窑,完成坯体的烧制。
与现有技术相比,本发明在坭兴陶坯料中添加ZnO和K2CO3能大大提高坯体中莫来石网络结构的强度,可以有效降低裂纹和变形的出现,提高烧成率。
具体实施方式
以下用实施例来进一步说明本发明的实质性内容,但并不以此限定本发明。
实施例1
1)制备坯料:将东泥4000Kg、西泥6000Kg、ZnO 400Kg、K2CO3 2Kg混合,按常规方法制成坯料。
2)坯体成型:将坯料制成板状坯体100个(长=1.0m,宽=0.8m,厚=5cm);
3)干燥坯体;
4)烧制坯体:将干燥坯体入窑烧制,先以每小时升高80℃的升温速度将温度升至550℃,再以每小时升高140℃的升温速度将温度升到1110℃,并在该温度下,持续烧制0.5小时,冷却后出窑,完成坯体的烧制。
经统计,完好率为92个。
对照例1
1)制备坯料:将东泥4000kg、西泥6000Kg混合,按常规方法制成坯料。
2)坯体成型:将坯料制成板状坯体100个(长=1.0m,宽=0.8m,厚=5cm);
3)干燥坯体;
4)烧制坯体:将干燥坯体入窑烧制,先以每小时升高80℃的升温速度将温度升至550℃,再以每小时升高140℃的升温速度将温度升到1110℃,并在该温度下,持续烧制0.5小时,冷却后出窑,完成坯体的烧制。
经统计,完好率为41个。
实施例2
1)制备坯料:将东泥6000Kg、西泥4000Kg、ZnO 800Kg、K2CO3 4Kg混合,按常规方法制成坯料。
2)坯体成型:将坯料制成板状坯体100个(长=1.0m,宽=0.8m,厚=5cm);
3)干燥坯体;
4)烧制坯体:将干燥坯体入窑烧制,先以每小时升高130℃的升温速度将温度升至650℃,再以每小时升高180℃的升温速度将温度升到1160℃,并在该温度下,持续烧制1小时,冷却后出窑,完成坯体的烧制。
经统计,完好率为93个。
实施例3
1)制备坯料:将东泥6000Kg、西泥4000Kg、ZnO 600Kg、K2CO3 3Kg混合,按常规方法制成坯料。
2)坯体成型:将坯料制成板状坯体100个(长=1.0m,宽=0.8m,厚=5cm);
3)干燥坯体;
4)烧制坯体:将干燥坯体入窑烧制,先以每小时升高100℃的升温速度将温度升至600℃,再以每小时升高160℃的升温速度将温度升到1140℃,并在该温度下,持续烧制0.8小时,冷却后出窑,完成坯体的烧制。
经统计,完好率为96个。
实施例4
1)制备坯料:将东泥6000Kg、西泥4000Kg、ZnO 400Kg、K2CO3 4Kg混合,按常规方法制成坯料。
2)坯体成型:将坯料制成板状坯体100个(长=1.0m,宽=0.8m,厚=5cm);
3)干燥坯体;
4)烧制坯体:将干燥坯体入窑烧制,先以每小时升高80℃的升温速度将温度升至650℃,再以每小时升高140℃的升温速度将温度升到1160℃,并在该温度下,持续烧制0.5小时,冷却后出窑,完成坯体的烧制。经统计,完好率为91个。
Claims (5)
1.大型坭兴陶板的制备方法,包括制备坯料、坯体成型、坯体干燥和烧制坯体,其特征在于:所述制备坯料是将东泥40~60重量份、西泥60~40重量份、ZnO 4~8重量份、K2CO30.02~0.04重量份混合,按常规方法制成坯料。
2.根据权利要求1所述的大型坭兴陶板的制备方法,其特征在于:所述坯料中各原料的重量份为:东泥60份、西泥40份、ZnO 4~8份、K2CO30.02~0.04份。
3.根据权利要求2所述的大型坭兴陶板的制备方法,其特征在于:所述坯料中各原料的重量份为:东泥60份、西泥40份、ZnO 6份、K2CO3 0.03份。
4.根据权利要求1所述的大型坭兴陶板的制备方法,其特征在于:所述烧制坯体是干燥坯体入窑烧制,先以每小时升高80~130℃的升温速度将温度升至550~650℃,再以每小时升高140~180℃的升温速度将温度升到1110~1160℃,并在该温度下,持续烧制0.5~1小时,冷却后出窑,完成坯体的烧制。
5.根据权利要求4所述的大型坭兴陶板的制备方法,其特征在于:将干燥坯体入窑烧制,先以每小时升高80~100℃的升温速度将温度升至600℃,再以每小时升高160~180℃的升温速度将温度升到1140℃,并在该温度下,持续烧制0.5~1小时,冷却后出窑,完成坯体的烧制。
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CN109020480A (zh) * | 2018-08-13 | 2018-12-18 | 上官清吉 | 一种宽温域烧结坭兴陶 |
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