CN109294290B - 一种高性能环保型高反射涂层材料及其制备方法和应用 - Google Patents
一种高性能环保型高反射涂层材料及其制备方法和应用 Download PDFInfo
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Abstract
本发明公开了一种高性能环保型高反射涂层材料,包括基料和调墨油;所述基料的组成为二氧化钛50~70wt%、硫酸钙5~15wt%、无铅玻璃熔剂15~28wt%、硅酸锆5~15wt%、氧化锡5~10wt%、硫酸钡0~15wt%、氧化锌0~10wt%;所述调墨油的用量为基料的18~25wt%。此外,还公开了上述高性能环保型高反射涂层材料的制备方法和应用。本发明涂层材料耐候性好、性能稳定,对可见光反射率高,与玻璃结合牢固、且热膨胀系数与玻璃匹配,有利于提高玻璃的强度;本发明制备方法工艺简单高效、生产成本低、经济环保,能够很好地满足企业的实际生产和应用需求,有利于促进双玻太阳能组件产业的技术进步和应用发展。
Description
技术领域
本发明涉及太阳能光伏技术领域,尤其涉及一种适用于双玻光伏组件背板玻璃的高反射涂层材料及其制备方法和应用。
背景技术
硅材料是一种具有光电效应的半导体材料,在阳光照射下,这种具有特殊电性能的半导体内可以产生自由电荷,自由电荷定向移动并积累,从而在其两端形成电动势,当用导体将其两端闭合时便产生电流,这种现象被称为光生伏打效应,简称光伏效应,太阳能电池发电原理主要就是基于这种效应。
太阳能电池是一种具有光电转换特性的半导体器件,它直接将太阳辐射能转换成直流电,是光伏发电的最基本单元。单体太阳能电池不能直接作为电源使用,作为电源必须将若干单体太阳能电池串、并联连接和严密封装成组件。太阳能电池组件(也叫太阳能电池板)是太阳能发电系统中的核心部分,也是太阳能发电系统中最重要的部分,其作用是将太阳能转化为电能,或送往蓄电池中存储起来,或推动负载工作。
传统晶体硅太阳能组件的背板有一定的透水率,透过背板的水汽会使EVA树脂很快分解析出醋酸,从而导致组件内部发生电化学腐蚀,进而增加了出现PID衰减和蜗牛纹发生的概率。为解决这一问题,近年来研究开发了双玻光伏组件,即由两片玻璃(前板玻璃、背板玻璃)和太阳能电池片组成复合层,电池片之间由导线串、并联汇集到引线端所形成的光伏电池组件,其发展应用迅速,特别适用于气候环境比较苛刻的应用场合,尤其是海边、水边和较高湿度地区的光伏电站。为有效提升组件效率,现有技术除使用白色的封装材料(如EVA和POE)之外,还采取在背板玻璃上涂覆白色高反射涂层的措施。而目前,现有的高反射涂层材料的可见光反射率最高达到80%左右,并且存在着稳定性差的问题,不能很好地满足企业的实际使用需求。在双玻光伏组件使用要求上,其可见光反射率需稳定在82%以上,这样电池组件的效率可以提高3~6%,进而可大大降低发生PID衰减的可能性。
发明内容
本发明的目的在于克服现有技术的不足,提供一种耐候性好、性能稳定、热膨胀系数匹配、反射率高的高性能环保型高反射涂层材料,以很好地满足双玻光伏组件的使用性能要求,从而有利于促进双玻太阳能组件产业的技术进步和应用发展。本发明的另一目的在于提供上述高性能环保型高反射涂层材料的制备方法和应用。
本发明的目的通过以下技术方案予以实现:
本发明提供的一种高性能环保型高反射涂层材料,包括基料和调墨油;所述基料的组成为二氧化钛50~70wt%、硫酸钙5~15wt%、无铅玻璃熔剂15~28wt%、硅酸锆5~15wt%、氧化锡5~10wt%、硫酸钡0~15wt%、氧化锌0~10wt%;所述调墨油的用量为基料的18~25wt%。优选地,所述基料的组成为二氧化钛50~60wt%、硫酸钙5~13wt%、无铅玻璃熔剂18~25wt%、硅酸锆5~10wt%、氧化锡5~10wt%、硫酸钡5~15wt%、氧化锌2~5wt%。
进一步地,本发明所述二氧化钛、硫酸钡、硫酸钙、硅酸锆的粒度为<1μm,所述无铅玻璃熔剂粒度为<0.5μm。
上述方案中,本发明所述无铅玻璃熔剂的化学组成为Li2O 1~3wt%、Na2O 10~16wt%、K2O 2~4wt%、ZnO 10~18wt%、B2O316~20wt%、SiO240~50wt%、TiO2 5~9wt%、Al2O31~3wt%、CaF20~5wt%。
本发明的另一目的通过以下技术方案予以实现:
本发明提供的上述高性能环保型高反射涂层材料的制备方法,包括以下步骤:
(1)所述经熔融后淬冷,烘干后球磨至粒度为<0.5μm;
(2)按照所述基料组成进行混合、球磨分散后,进行沉淀、脱水、烘干、打粉而得到混料;
(3)所述混料加入调墨油进行研磨分散,即得到高反射涂层材料。
进一步地,本发明制备方法所述步骤(1)中无铅玻璃熔剂的熔融温度为1300℃。
本发明提供的上述高性能环保型高反射涂层材料,可直接涂覆使用,或在使用前加入稀释剂,其应用如下:在所述高反射涂层材料中加入用量为基料的0~5wt%的稀释剂一起混合而形成涂料,然后涂覆在双玻光伏组件的背板玻璃上,干燥后即得到高反射涂层。优选地,所述稀释剂的用量为基料的2~5wt%。具体可进一步采取如下措施:
所述涂料采用丝网印刷的方法涂覆在双玻光伏组件的背板玻璃上,涂覆厚度为15~25μm,经680~720℃烘烤1.8~3min,即得到高反射涂层。
本发明具有以下有益效果:
(1)本发明高反射涂层材料与双玻光伏组件的背板玻璃结合牢固,附着性能好,不易刮擦。
(2)本发明高反射涂层材料的热膨胀系数与玻璃匹配,收缩膨胀小,玻璃不会变形,有利于提高玻璃的强度。
(3)本发明高反射涂层材料对可见光反射率≥82%,且耐化学腐蚀,热稳定性、尺寸稳定性好。
(4)本发明制备方法工艺简单、生产成本低,生产高效、能耗低,采用了无铅玻璃熔剂,无重金属超标,经济环保,能够很好地满足企业的实际生产和应用需求,有利于促进双玻太阳能组件产业的技术进步和应用发展。
附图说明
下面将结合实施例和附图对本发明作进一步的详细描述:
图1是本发明实施例高反射涂层材料在太阳能电池组件的应用示意图;
图2是本发明实施例高反射涂层材料的应用原理示意图。
具体实施方式
本发明实施例高性能环保型高反射涂层材料,包括基料和调墨油;其中,基料的组成为二氧化钛50~70wt%、硫酸钙5~15wt%、无铅玻璃熔剂15~28wt%、硅酸锆5~15wt%、氧化锡5~10wt%、硫酸钡0~15wt%、氧化锌0~10wt%;调墨油的用量为基料的18~25wt%。具体组成如表1所示。
表1本发明实施例高性能环保型高反射涂层材料的组成
上述二氧化钛、硫酸钡、硫酸钙、硅酸锆的粒度为<1μm,无铅玻璃熔剂粒度需<0.5μm。
无铅玻璃熔剂的化学组成为Li2O 1~3wt%、Na2O 10~16wt%、K2O 2~4wt%、ZnO10~18wt%、B2O3 16~20wt%、SiO2 40~50wt%、TiO2 5~9wt%、Al2O3 1~3wt%、CaF2 0~5wt%。
本发明实施例高性能环保型高反射涂层材料的制备方法,其步骤如下:
(1)将无铅玻璃熔剂经1300℃熔融后淬冷,烘干后球磨至粒度为<0.5μm;
(2)按照表1所示基料组成进行混合、球磨分散后,进行沉淀、脱水、烘干、打粉而得到混料;
(3)上述混料加入调墨油进行研磨分散,即得到高反射涂层材料。
本发明实施例高性能环保型高反射涂层材料的应用如下:
可直接涂覆使用,或在使用前加入稀释剂(采用淄博欧泊陶瓷玻璃科技有限公司生产的、编号为M904的钢化玻璃油墨用稀释剂(水性慢干)),即在本发明实施例高性能环保型高反射涂层材料中加入用量为基料的0~5wt%的稀释剂(具体用量见表2)一起混合而形成涂料,然后采用丝网印刷的方法涂覆在双玻光伏组件的背板玻璃上,涂覆厚度为15~25μm,经680~720℃烘烤1.8~3min(具体参数见表2),即得到高反射涂层(图1所示白色部分),其性能指标如表3所示。
表2本发明实施例高性能环保型高反射涂层材料的应用
表3本发明实施例高性能环保型高反射涂层的性能指标
注:1)本发明实施例高反射涂层材料对可见光的反射原理如图2所示。可见光反射率的检测采用SMN-R全智能型反射率仪。
2)热膨胀系数的检测采用DIL 402Expedis Select&Supreme热膨胀测量仪。
Claims (7)
1.一种高性能环保型高反射涂层材料,其特征在于:包括基料和调墨油;所述基料的组成为二氧化钛50~70wt%、硫酸钙5~15wt%、无铅玻璃熔剂15~28wt%、硅酸锆5~15wt%、氧化锡5~10wt%、硫酸钡0~15wt%、氧化锌0~10wt%;所述调墨油的用量为基料的18~25wt%;所述二氧化钛、硫酸钡、硫酸钙、硅酸锆的粒度为<1μm;所述无铅玻璃熔剂粒度为<0.5μm,其化学组成为Li2O 1~3wt%、Na2O 10~16wt%、K2O 2~4wt%、ZnO 10~18wt%、B2O3 16~20wt%、SiO2 40~50wt%、TiO2 5~9wt%、Al2O3 1~3wt%、CaF2 0~5wt%;在所述高反射涂层材料中加入用量为基料0~5wt%的稀释剂一起混合而形成涂料,所述涂料涂覆在双玻光伏组件的背板玻璃上形成15~25μm的涂覆厚度后,经680~720℃烘烤1.8~3min得到的高反射涂层对可见光反射率≥82%。
2.根据权利要求1所述的高性能环保型高反射涂层材料,其特征在于:所述基料的组成为二氧化钛50~60wt%、硫酸钙5~13wt%、无铅玻璃熔剂18~25wt%、硅酸锆5~10wt%、氧化锡5~10wt%、硫酸钡5~15wt%、氧化锌2~5wt%。
3.权利要求1或2所述高性能环保型高反射涂层材料的制备方法,其特征在于包括以下步骤:
(1) 所述无铅玻璃熔剂经熔融后淬冷,烘干后球磨至粒度为<0.5μm;
(2) 按照所述基料组成进行混合、球磨分散后,进行沉淀、脱水、烘干、打粉而得到混料;
(3) 所述混料加入调墨油进行研磨分散,即得到高反射涂层材料。
4.根据权利要求3所述的高性能环保型高反射涂层材料的制备方法,其特征在于:所述步骤(1)中无铅玻璃熔剂的熔融温度为1300℃。
5.权利要求1或2所述高性能环保型高反射涂层材料的应用,其特征在于:在所述高反射涂层材料中加入用量为基料的0~5wt%的稀释剂一起混合而形成涂料,然后涂覆在双玻光伏组件的背板玻璃上,干燥后即得到高反射涂层。
6.根据权利要求5所述的高性能环保型高反射涂层材料的应用,其特征在于:所述稀释剂的用量为基料的2~5wt%。
7.根据权利要求5或6所述的高性能环保型高反射涂层材料的应用,其特征在于:所述涂料采用丝网印刷的方法涂覆在双玻光伏组件的背板玻璃上,涂覆厚度为15~25μm,经680~720℃烘烤1.8~3min,即得到高反射涂层。
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