CN113292325A - 一种颜色不黄变的多孔陶瓷及其制备方法 - Google Patents
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Abstract
本发明公开了一种颜色不黄变的多孔陶瓷及其制备方法,通过减少油脂性的润滑剂的加入,尽量减少有机原料的使用,确保烧制成型时和后续使用时,不会使多孔陶瓷制品表面发黄;利用氧化钛改性生物质粉料,能有效提升多孔陶瓷的洁白度,同时氧化钛具有自净化催化效果,可催化生物质粉料充分燃烧,在造孔的同时,不会使多孔陶瓷制品表面发黄;改性羟丙基甲基纤维素在烧制成型时,羟丙基甲基纤维素燃烧,碱式醋酸铝生成氧化铝,与六偏磷酸钠、气相二氧化硅催化燃烧并防止积碳变色,同时具有增强堇青石粉、石英粉、贝壳粉之间粘结力的作用,提升多孔陶瓷的结构强度,对后续包装、组合安装具有降低损耗的作用。
Description
技术领域
本发明涉及陶瓷技术工艺,尤其涉及一种颜色不黄变的多孔陶瓷及其制备方法。
背景技术
红外线炉具是这几年发展得很快的一种节能炉具,它利用多孔陶瓷材料更有利于气体燃烧的特点,使燃料得以充分燃烧,从而提高燃气的利用率,降低燃气的相对使用量,达到节能的效果;同时由于燃气得到充分燃烧,减少了积碳以及挥发到空气中的碳微粒,达到环保的效果。
在多孔陶瓷制品中,其孔隙率大小对于其产品性能有很大影响,孔隙率高的产品,其透气性、热稳定性高,且其密度较低,适用于生产陶瓷加热器的加热部件。
现有技术中,为提高多孔陶瓷制品的孔隙率,采取在多孔陶瓷胚料中添加如木炭、焦炭或生物质粉料作为造孔剂,使其在使用时经燃烧后留下微孔,提升其孔隙率。
但在实践中发现,在添加如木炭、焦炭或生物质粉料作为造孔剂的同时,由于造孔剂的燃烧,会使多孔陶瓷制品表面发黄,影响多孔陶瓷制品的外观洁白度和美感。
发明内容
本发明开发了一种颜色不黄变的多孔陶瓷及其制备方法,所制得的多孔陶瓷在保持高孔隙率的同时,表面不黄变,有效提升了多孔陶瓷的外观美感和整体强度。
一种颜色不黄变的多孔陶瓷的制备方法,所述制备方法如下:
(1)原料组成
堇青石粉50~75份;石英粉5~10份;贝壳粉10~20份;改性生物质粉料10~30份;改性羟丙基甲基纤维素0.5~5份;硬脂酸0.8~2.5份;水20~30份;水玻璃2~3份;
(2)制备方法
改性羟丙基甲基纤维素与水配比为改性羟丙基甲基纤维素溶液,然后溶解水玻璃,溶解完成后加入硬脂酸乳化,然后加入其他粉料并混合搅拌、混炼得到黏土,然后经制胚-压模机打孔压花成型-自然干燥-烧制成型,制得多孔陶瓷。
本发明原料组成均为质量份。
进一步的,所述改性生物质粉料的制备方法如下:
(1)将生物质粉料浸于其质量2~3倍的1%双氧水中,搅拌4~6h;
(2)加入生物质粉料质量3%~5%的氧化钛,混合均匀后加入生物质粉料质量1%~2%的硅烷偶联剂,搅拌1~2h;
(3)过滤并干燥,制得改性生物质粉料。
进一步的,所述生物质粉料为稻壳粉、麦壳粉、核桃壳粉、花生壳粉、秸秆粉、树枝、干草中的一种或数种的混合物。
进一步的,所述改性羟丙基甲基纤维素的制备方法如下:
(1)将羟丙基甲基纤维素溶于水中,然后加入羟丙基甲基纤维素质量8%~12%的水合碱式醋酸铝和2%~3%的六偏磷酸钠,搅拌均匀后加入羟丙基甲基纤维素质量1%~2%的气相二氧化硅和1%~2%的硅烷偶联剂,滴加少量盐酸,搅拌反应1~2h;
(2)反应完成后,制得改性羟丙基甲基纤维素溶液,直接用于生产多孔陶瓷。
进一步的,所述硅烷偶联剂为KH550、KH560、KH570中的一种或多种。
进一步的,所述水玻璃的模数为2.2~3.5。
进一步的,所述堇青石粉、石英粉、贝壳粉的粒度为30~150目。
进一步的,所述氧化钛的粒径为5nm~15nm。
进一步的,所述气相二氧化硅的粒径为20nm~50nm。
本发明制得的多孔陶瓷具有颜色洁白、而且在使用过程中持续洁白的特点,同时强度得到提升。
本发明的优点:
1、本发明减少油脂性的润滑剂的加入,尽量减少有机原料的使用,确保烧制成型时和后续使用时,不会使多孔陶瓷制品表面发黄;
2、本发明改性生物质粉料利用氧化钛能有效提升多孔陶瓷的洁白度,同时氧化钛具有自净化催化效果,可催化生物质粉料充分燃烧,在造孔的同时,不会使多孔陶瓷制品表面发黄;
3、改性羟丙基甲基纤维素在烧制成型时,羟丙基甲基纤维素燃烧,碱式醋酸铝生成氧化铝,与六偏磷酸钠、气相二氧化硅催化燃烧并防止积碳变色,同时具有增强堇青石粉、石英粉、贝壳粉之间粘结力的作用,提升多孔陶瓷的结构强度,对后续包装、组合安装具有降低损耗的作用。
具体实施方式
实施例1
一种颜色不黄变的多孔陶瓷的制备方法,所述制备方法如下:
(1)原料组成
堇青石粉50份;石英粉5份;贝壳粉20份;改性生物质粉料10份;改性羟丙基甲基纤维素0.5份;硬脂酸0.8份;水20份;水玻璃3份;
(2)制备方法
改性羟丙基甲基纤维素与水配比为改性羟丙基甲基纤维素溶液,然后溶解水玻璃,溶解完成后加入硬脂酸乳化,然后加入其他粉料并混合搅拌、混炼得到黏土,然后经制胚-压模机打孔压花成型-自然干燥-烧制成型,制得多孔陶瓷。
所述改性生物质粉料的制备方法如下:
(1)将生物质粉料浸于其质量2倍的1%双氧水中,搅拌6h;
(2)加入生物质粉料质量3%的氧化钛,混合均匀后加入生物质粉料质量1%的硅烷偶联剂,搅拌1h;
(3)过滤并干燥,制得改性生物质粉料。
所述生物质粉料为稻壳粉。
所述改性羟丙基甲基纤维素的制备方法如下:
(1)将羟丙基甲基纤维素溶于水中,然后加入羟丙基甲基纤维素质量8%的水合碱式醋酸铝和2%的六偏磷酸钠,搅拌均匀后加入羟丙基甲基纤维素质量1%的气相二氧化硅和1%的硅烷偶联剂,滴加少量盐酸,搅拌反应1h;
(2)反应完成后,制得改性羟丙基甲基纤维素溶液,直接用于生产多孔陶瓷。
所述硅烷偶联剂为KH550。
所述水玻璃的模数为2.2。
所述堇青石粉、石英粉、贝壳粉的粒度为30目。
所述氧化钛的粒径为5nm。
所述气相二氧化硅的粒径为20nm。
实施例2
一种颜色不黄变的多孔陶瓷的制备方法,所述制备方法如下:
(1)原料组成
堇青石粉60份;石英粉8份;贝壳粉15份;改性生物质粉料20份;改性羟丙基甲基纤维素2份;硬脂酸1.2份;水24份;水玻璃3份;
(2)制备方法
改性羟丙基甲基纤维素与水配比为改性羟丙基甲基纤维素溶液,然后溶解水玻璃,溶解完成后加入硬脂酸乳化,然后加入其他粉料并混合搅拌、混炼得到黏土,然后经制胚-压模机打孔压花成型-自然干燥-烧制成型,制得多孔陶瓷。
所述改性生物质粉料的制备方法如下:
(1)将生物质粉料浸于其质量3倍的1%双氧水中,搅拌5h;
(2)加入生物质粉料质量4%的氧化钛,混合均匀后加入生物质粉料质量2%的硅烷偶联剂,搅拌2h;
(3)过滤并干燥,制得改性生物质粉料。
所述生物质粉料为核桃壳粉。
所述改性羟丙基甲基纤维素的制备方法如下:
(1)将羟丙基甲基纤维素溶于水中,然后加入羟丙基甲基纤维素质量10%的水合碱式醋酸铝和3%的六偏磷酸钠,搅拌均匀后加入羟丙基甲基纤维素质量2%的气相二氧化硅和2%的硅烷偶联剂,滴加少量盐酸,搅拌反应2h;
(2)反应完成后,制得改性羟丙基甲基纤维素溶液,直接用于生产多孔陶瓷。
所述硅烷偶联剂为KH560。
所述水玻璃的模数为2.6。
所述堇青石粉、石英粉、贝壳粉的粒度为100目。
所述氧化钛的粒径为10nm。
所述气相二氧化硅的粒径为40nm。
实施例3
一种颜色不黄变的多孔陶瓷的制备方法,所述制备方法如下:
(1)原料组成
堇青石粉75份;石英粉10份;贝壳粉10份;改性生物质粉料30份;改性羟丙基甲基纤维素5份;硬脂酸2.5份;水30份;水玻璃2份;
(2)制备方法
改性羟丙基甲基纤维素与水配比为改性羟丙基甲基纤维素溶液,然后溶解水玻璃,溶解完成后加入硬脂酸乳化,然后加入其他粉料并混合搅拌、混炼得到黏土,然后经制胚-压模机打孔压花成型-自然干燥-烧制成型,制得多孔陶瓷。
所述改性生物质粉料的制备方法如下:
(1)将生物质粉料浸于其质量3倍的1%双氧水中,搅拌4h;
(2)加入生物质粉料质量5%的氧化钛,混合均匀后加入生物质粉料质量2%的硅烷偶联剂,搅拌2h;
(3)过滤并干燥,制得改性生物质粉料。
所述生物质粉料为秸秆粉。
所述改性羟丙基甲基纤维素的制备方法如下:
(1)将羟丙基甲基纤维素溶于水中,然后加入羟丙基甲基纤维素质量12%的水合碱式醋酸铝和3%的六偏磷酸钠,搅拌均匀后加入羟丙基甲基纤维素质量2%的气相二氧化硅和2%的硅烷偶联剂,滴加少量盐酸,搅拌反应2h;
(2)反应完成后,制得改性羟丙基甲基纤维素溶液,直接用于生产多孔陶瓷。
所述硅烷偶联剂为KH570。
所述水玻璃的模数为3.5。
所述堇青石粉、石英粉、贝壳粉的粒度为150目。
所述氧化钛的粒径为15nm。
所述气相二氧化硅的粒径为50nm。
实施例4
一种颜色不黄变的多孔陶瓷的制备方法,生物质粉料未经过改性,其余同实施例2。
实施例5
一种颜色不黄变的多孔陶瓷的制备方法,羟丙基甲基纤维素未经过改性,其余同实施例2。
对比例1
一种多孔陶瓷的制备方法,生物质粉料未经过改性,羟丙基甲基纤维素未经过改性,其余同实施例2。
对比例2
一种多孔陶瓷的制备方法,生物质粉料改性时未经过双氧水浸泡处理,其余同实施例2。
对比例3
一种多孔陶瓷的制备方法,羟丙基甲基纤维素改性时未加入水合碱式醋酸铝,其余同实施例2。
对比例4
一种多孔陶瓷的制备方法,羟丙基甲基纤维素改性时未加入六偏磷酸钠,其余同实施例2。
对比例5
一种多孔陶瓷的制备方法,羟丙基甲基纤维素改性时未加入气相二氧化硅,其余同实施例2。
对比例6
一种多孔陶瓷的制备方法,羟丙基甲基纤维素改性时用焦磷酸钠取代六偏磷酸钠,其余同实施例2。
性能检测与对比:
将上述实施例与对比例多孔陶瓷规格统一为137mm*92mm*13mm,同时压模机打孔压花规格统一为孔径1.25mm、孔数3600个。
1、孔隙率:以压汞法测试各实施例与对比例多孔陶瓷的孔隙率;
2、黄度:烧制成型后,以HunterLab Labscan XE型黄色指数仪测量各实施例与对比例多孔陶瓷的黄色指数YI;
额定负荷下,通气燃烧10min,关闭休息2min,反复1500次后,测试长时间使用后各实施例与对比例多孔陶瓷的黄色指数YI’;
黄色指数YI可正可负,正值越大黄色越深,负值则表示呈蓝色;
YI=100(1.28X-1.06Z)/Y
3、强度:以抗压强度仪测试各实施例与对比例多孔陶瓷的抗压负荷(N),抗压负荷越高,则多孔陶瓷的抗压强度越好。
上述测试均随机选取各实施例与对比例制备的多孔陶瓷各20块,记录结果取平均值。
从上表可见,本发明在保持高孔隙率的同时,利用改性生物质粉料和改性羟丙基甲基纤维素降低了多孔陶瓷的黄度,提升了多孔陶瓷的洁白度,有效提升了多孔陶瓷的外观美感;而且经长时间使用后,多孔陶瓷的黄度变化较小,产品外观稳定性高;同时改性羟丙基甲基纤维素能有效提升多孔陶瓷的结构强度,对后续包装、组合安装具有降低损耗的作用。
最后:以上所述仅为本发明的优选实施例而已,并不用于限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种颜色不黄变的多孔陶瓷的制备方法,其特征在于:所述制备方法如下:
(1)原料组成
堇青石粉50~75份;石英粉5~10份;贝壳粉10~20份;改性生物质粉料10~30份;改性羟丙基甲基纤维素0.5~5份;硬脂酸0.8~2.5份;水20~30份;水玻璃2~3份;上述均为质量份;
(2)制备方法
改性羟丙基甲基纤维素与水配比为改性羟丙基甲基纤维素溶液,然后溶解水玻璃,溶解完成后加入硬脂酸乳化,然后加入其他粉料并混合搅拌、混炼得到黏土,然后经制胚-压模机打孔压花成型-自然干燥-烧制成型,制得多孔陶瓷。
2.一种如权利要求1所述制备方法,其特征在于:所述改性生物质粉料的制备方法如下:
(1)将生物质粉料浸于其质量2~3倍的1%双氧水中,搅拌4~6h;
(2)加入生物质粉料质量3%~5%的氧化钛,混合均匀后加入生物质粉料质量1%~2%的硅烷偶联剂,搅拌1~2h;
(3)过滤并干燥,制得改性生物质粉料。
3.一种如权利要求2所述制备方法,其特征在于:所述生物质粉料为稻壳粉、麦壳粉、核桃壳粉、花生壳粉、秸秆粉、树枝、干草中的一种或数种的混合物。
4.一种如权利要求1所述制备方法,其特征在于:所述改性羟丙基甲基纤维素的制备方法如下:
(1)将羟丙基甲基纤维素溶于水中,然后加入羟丙基甲基纤维素质量8%~12%的水合碱式醋酸铝和2%~3%的六偏磷酸钠,搅拌均匀后加入羟丙基甲基纤维素质量1%~2%的气相二氧化硅和1%~2%的硅烷偶联剂,滴加少量盐酸,搅拌反应1~2h;
(2)反应完成后,制得改性羟丙基甲基纤维素溶液,直接用于生产多孔陶瓷。
5.一种如权利要求2或4所述制备方法,其特征在于:所述硅烷偶联剂为KH550、KH560、KH570中的一种或多种。
6.一种如权利要求1所述制备方法,其特征在于:所述水玻璃的模数为2.2~3.5。
7.一种如权利要求1所述制备方法,其特征在于:所述堇青石粉、石英粉、贝壳粉的粒度为30~150目。
8.一种如权利要求2所述制备方法,其特征在于:所述氧化钛的粒径为5nm~15nm。
9.一种如权利要求4所述制备方法,其特征在于:所述气相二氧化硅的粒径为20nm~50nm。
10.根据除权利要求5外上述任意一项权利要求所述制备方法制得的多孔陶瓷。
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