摘要:
采用液相还原法,通过改变纳米银晶浓度制得不同粒径的类球形银粉。采用扫描电子显微镜、比表面积分析仪、激光粒度分析仪等对银粉进行物理性能表征,并进行低温(200 ℃)烧结活性分析。结果表明:银粉颗粒结晶度高,单分散性好,且银粉粒径随加入的纳米银晶浓度提高呈规律性递减;样品4粒径最小,经低温烧结后银粉颗粒边界逐渐消失,烧结30 min后银粉完全烧结,形成交错联结的空间网络结构。高结晶单分散银粉的制备为HJT电池开发提供技术支撑。
关键词:
银粉;液相还原;粒度;低温烧结;高结晶
Abstract:
Liquid phase reduction method is used to alter nano-silver crystal concentration and fabricate near spherical silver powder of different particle diameters.SEM,specific surface area instrument,and laser particle analyzer are used to characterize the physical properties of the silver powder.Besides,low-temperature(200 ℃) sintering activity analysis is carried out.The results show that the silver powder particle is highly crystallized and on a good monodisperse state,and the silver powder particle diameter regularly decreases with increasing added nano-silver crystal concentration;sample 4 has the smallest particle diameter and gradually lost silver powder particle boundary after low-temperature sintering.After 30 min,the silver powder is fully sintered,forming an interconnected spatial grid structure.The fabrication of highly crystallized monodisperse silver powder provides technical support for the development of the HJT battery.
Keywords:
silver powder;liquid phase reduction;particle size;low-temperature sintering;highly crystallized
[1]SHARMAJR,DASG,ROYAB,etal.DesignanalysisofheterojunctionsolarcellswithalignedAZOnanorodsembeddedinp-typeSiwafer[J].Silicon,2020,12(2):305-316.
[2]赵怀志.银的主要应用领域和发展现状[J].云南冶金,2002,31(3):118-122,127.
[3]李军,王勤,徐茂.化学还原制备晶硅太阳能电池背电极用银微粉[J].云南冶金,2022,51(4):104-108.
[4]孙宝,游立,常意川,等.高浓度体系下银粉形貌和结构的还原剂与分散剂影响研究[J].船电技术,2021,41(4):61-64.
[5]樊新.纳米银粉的制备及其电化学性能研究[D].长沙:中南大学,2007.
[6]姜曌,张丽奇.化学还原法制备纳米银粉的研究[J].山东工业技术,2015(22):295.
[7]李雪嵩,高健宝,尹超.晶种法制备微米级球形银粉的超声诱导空化处理[J].黄金,2021,42(10):4-7.
[8]YIZ,ZHANGJB,HEH,etal.Convenientsynthesisofsilvernanoplateswithadjustablesizethroughseedmediatedgrowthapproach[J].Tran-sactionsofNonferrousMetalsSocietyofChina,2012,22(4):865-872.
[9]晏璐,郑威猛,王家炜,等.纳米银的超声微波辅助化学还原法合成及表征[J].广东化工,2022,49(4):23-26.
[10]李照枝.高分散性微纳米银粉的可控制备工艺研究[D].成都:电子科技大学,2021.
[11]李向果,姚国佳,马勇,等.表面活性剂对微米银粉的粒径与形貌的影响研究[J].电镀与精饰,2022,44(5):50-56.