CN108821762A - 一种防静电掺铝氧化锌导电粉及其制备方法和应用 - Google Patents
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Abstract
本发明公开了一种防静电掺铝氧化锌导电粉的制备方法,具体包括如下步骤:(1)将ZnO和Al2O3粉体放入球磨罐中,在球磨机上进行球磨混合;(2)混合均匀后放入干燥箱中,在100℃下进行干燥;(3)将干燥后的混合粉末装入氧化铝坩埚内,将坩埚放在微波连续化合成炉中进行合成,合成条件为1200‑1300℃,保温0.5‑1h,得到导电粉;(4)将微波合成的导电粉放入球磨罐中,按导电粉、磨球的重量比例为1:(1.6‑2)在球磨机中进行研磨,球磨时间为1‑3小时,过150~200目筛后,得到掺铝氧化锌导电粉。本发明采用微波连续化合成方法制备掺铝氧化锌导电粉,合成速度快、温度低、节能环保且产量高,导电粉体电阻率为3.0‑9.8kΩ·cm。
Description
技术领域
本发明涉及无机导电粉料技术领域,特别涉及一种防静电掺铝氧化锌导电粉及其制备方法和应用。
背景技术
ZnO属于n型半导体材料,其室温下禁带宽度约为3.37eV,未经掺杂的氧化锌由于填隙锌原子电离的电子数较少,载流子浓度低,所以电阻率高。通过掺入Al3+、Ti4+、Mg2+、Li+和Ga3+等杂质原子使氧化锌的导电性得到了显著的改善。掺铝氧化锌的合成方法有多种,其中固相法由于适合大批量生产,成本低而得到广泛运用。但常规高温固相法合成的样品晶粒尺寸大、分布不均匀,同时对能源的消耗较大,同时掺铝质量比一般少于1.25%,高于1.25%后容易形成不导电的ZnAl2O4尖晶石相。而微波固相法是一种新兴的合成方式,具有合成速度快、温度低、节能环保的优点,微波连续化后提高了产量。
发明内容:
本发明的目的在于克服现有技术的缺陷,提供一种防静电掺铝氧化锌导电粉及其制备方法和应用。
本发明采用以下技术方案:
一种防静电掺铝氧化锌导电粉的制备方法,其特征在于,防静电掺铝氧化锌导电粉是利用微波连续化合成工艺合成的,具体包括如下步骤:
(1)将ZnO和Al2O3粉体放入球磨罐中,再按粉体、磨球与乙醇的重量比例为1:(1.6-2):(0.5-1)加入磨球和乙醇溶液进行分散,在球磨机上进行球磨混合,球磨时间为10-15h;
(2)混合均匀后放入干燥箱中,在100℃下进行干燥;
(3)将干燥后的混合粉末装入氧化铝坩埚内,将坩埚放在微波连续化合成炉中进行合成,合成条件为1200-1300℃,保温0.5-1h,得到导电粉;
(4)将微波合成的导电粉放入球磨罐中,按导电粉、磨球的重量比例为1:(1.6-2)在球磨机中进行研磨,球磨时间为1-3小时,过150~200目筛后,得到掺铝氧化锌导电粉。
优选地,所述的粉体中,Al2O3粉体含量为1.25-2.50wt%。。
优选地,所述的微波连续化合成,功率为1.0-5.0kW。
一种防静电掺铝氧化锌导电粉是根据上述任一项的制备方法制得。
一种防静电掺铝氧化锌导电粉在防静电陶瓷砖中的应用。
一种防静电掺铝氧化锌导电粉在防静电涂料中的应用。
防静电掺铝氧化锌导电粉在防静电陶瓷砖中的应用:将防静电掺铝氧化锌导电粉末压制成型制成防静电陶瓷砖生坯,然后进行微波烧结。微波烧结方法的烧结温度在1200-1300℃并保温0.25-0.5h。
防静电掺铝氧化锌导电粉在防静电涂料中的应用:将防静电掺铝氧化锌导电粉末加入到涂料中,经搅拌均匀后制成防静电涂料。防静电掺铝氧化锌导电粉加入到涂料中的体积比例为20-30%。
根据Al2O3粉体和ZnO粉体的平均粒径(纳米、亚微米、微米)和Al2O3粉体含量(1.25-2.50wt%),适当调节微波的功率(1-5kW连续可调)来控制加热速率,以便根据实际情况更好地实施掺铝氧化锌导电粉末的微波连续化合成。
本发明的有益效果:本发明采用微波连续化合成方法制备掺铝氧化锌导电粉,合成速度快、温度低、节能环保且产量高,导电粉体电阻率为3.0-9.8kΩ·cm。
具体实施方式
下面结合具体实施例对本发明作进一步详细的说明。
实施例1:
防静电掺铝氧化锌导电粉的制备:
(1)将ZnO和Al2O3粉体放入球磨罐中,其中Al2O3粉体为粉体总量的2.5%,再按粉体、磨球与乙醇的重量比例为1:1.6:1加入磨球和乙醇溶液进行分散,在球磨机上进行球磨混合,球磨时间为12h;
(2)混合均匀后放入干燥箱中,在100℃下进行干燥;
(3)将干燥后的混合粉末装入氧化铝坩埚内,将坩埚放在微波连续化合成炉中进行合成,微波功率一般选择5kW,合成条件为1250℃,保温1h,得到导电粉;
(4)将微波合成的导电粉放入球磨罐中,按导电粉、磨球的重量比例为1:2在球磨机中进行研磨,球磨时间为3小时,过180目筛后,得到掺铝氧化锌导电粉,导电粉体电阻率为9.8kΩ·cm。
实施例2:
防静电掺铝氧化锌导电粉的制备:
(1)将ZnO和Al2O3粉体放入球磨罐中,其中Al2O3粉体为粉体总量的1.25%,再按粉体、磨球与乙醇的重量比例为1:2:0.5加入磨球和乙醇溶液进行分散,在球磨机上进行球磨混合,球磨时间为15h;
(2)混合均匀后放入干燥箱中,在100℃下进行干燥;
(3)将干燥后的混合粉末装入氧化铝坩埚内,将坩埚放在微波连续化合成炉中进行合成,微波功率一般选择3kW,合成条件为1300℃,保温0.5h,得到导电粉;
(4)将微波合成的导电粉放入球磨罐中,按导电粉、磨球的重量比例为1:1.8在球磨机中进行研磨,球磨时间为2小时,过200目筛后,得到掺铝氧化锌导电粉,导电粉体电阻率为5.8kΩ·cm。
实施例3:
防静电掺铝氧化锌导电粉的制备:
(1)将ZnO和Al2O3粉体放入球磨罐中,其中Al2O3粉体为粉体总量的2.0%,再按粉体、磨球与乙醇的重量比例为1:1.8:0.8加入磨球和乙醇溶液进行分散,在球磨机上进行球磨混合,球磨时间为10h;
(2)混合均匀后放入干燥箱中,在100℃下进行干燥;
(3)将干燥后的混合粉末装入氧化铝坩埚内,将坩埚放在微波连续化合成炉中进行合成,微波功率一般选择1kW,合成条件为1200℃,保温0.8h,得到导电粉;
(4)将微波合成的导电粉放入球磨罐中,按导电粉、磨球的重量比例为1:1.6在球磨机中进行研磨,球磨时间为1小时,过150目筛后,得到掺铝氧化锌导电粉,导电粉体电阻率为3.0kΩ·cm。
实施例4:
将实施例1制备的掺铝氧化锌导电粉末压制成型成防静电陶瓷砖生坯,然后采用微波连续化烧结方法在1200-1300℃烧结温度并保温0.25-0.5h进行微波连续化烧结制成防静电陶瓷砖,电阻率为3.0-9.8kΩ·cm。
微波功率的选择随着掺铝氧化锌导电粉末平均粒径和陶瓷砖生坯的大小不同会有一些变化,典型的微波功率一般选择3kW。
实施例5:
将体积比例为20-30%的掺铝氧化锌导电粉末直接加入到市购涂料中,经搅拌均匀后制成防静电涂料,电阻率为3.0-9.0kΩ·cm。
上述实施例仅用以说明本发明的技术方案而并非对其进行限制,凡未脱离本发明精神和范围的任何修改或者等同替换,其均应涵盖在本发明技术方案的范围。
Claims (6)
1.一种防静电掺铝氧化锌导电粉的制备方法,其特征在于,防静电掺铝氧化锌导电粉是利用微波连续化合成工艺合成的,具体包括如下步骤:
(1)将ZnO和Al2O3粉体放入球磨罐中,再按粉体、磨球与乙醇的重量比例为1:(1.6-2):(0.5-1)加入磨球和乙醇溶液进行分散,在球磨机上进行球磨混合,球磨时间为10-15h;
(2)混合均匀后放入干燥箱中,在100℃下进行干燥;
(3)将干燥后的混合粉末装入氧化铝坩埚内,将坩埚放在微波连续化合成炉中进行合成,合成条件为1200-1300℃,保温0.5-1h,得到导电粉;
(4)将微波合成的导电粉放入球磨罐中,按导电粉、磨球的重量比例为1:(1.6-2)在球磨机中进行研磨,球磨时间为1-3小时,过150~200目筛后,得到掺铝氧化锌导电粉。
2.根据权利要求1所述的一种防静电掺铝氧化锌导电粉的制备方法,其特征在于,所述的粉体中,Al2O3粉体含量为1.25-2.50wt%。
3.根据权利要求1所述的一种防静电掺铝氧化锌导电粉的制备方法,其特征在于,所述的微波连续化合成,功率为1.0-5.0kW。
4.一种防静电掺铝氧化锌导电粉,其特征在于,防静电掺铝氧化锌导电粉是根据权利要求1-3任一项的制备方法制得。
5.一种防静电掺铝氧化锌导电粉在防静电陶瓷砖中的应用。
6.一种防静电掺铝氧化锌导电粉在防静电涂料中的应用。
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