本文關(guān)鍵詞：粒徑可控的微納米銀粉制備及在導(dǎo)電油墨中的應(yīng)用　出處：《電子科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 納米銀 微米銀 粒徑可控 導(dǎo)電油墨

【摘要】：近年來,以微納研究為基礎(chǔ)的科技動(dòng)力,正催化著工業(yè)領(lǐng)域發(fā)生革命性變化。微納材料作為一種新型的功能性材料,以其優(yōu)良的電學(xué)性能、化學(xué)性能、光學(xué)性能受到人們的廣泛關(guān)注。研究表明,微納銀粉的優(yōu)異性能及應(yīng)用受到其晶體結(jié)構(gòu)、形貌、粒徑、粒度分布、分散性等一系列物理參數(shù)影響。因此,實(shí)現(xiàn)微納銀粉的可控制備具有重大的理論和現(xiàn)實(shí)意義。銀粉的形貌可控的工藝漸臻成熟,在一定程度上實(shí)現(xiàn)了銀粉性質(zhì)的調(diào)控。本文采用化學(xué)還原法在水相中分別制備出粒徑各異的微納銀粉。實(shí)現(xiàn)對(duì)銀粉粒徑的可控制備,進(jìn)一步對(duì)其性質(zhì)實(shí)現(xiàn)可控、優(yōu)化。本論文,在納米銀粒徑可控制備中,建立以銀鹽用量、晶種大小和用量為參變量的可控制備模型。以抗壞血酸為還原劑,PVP為分散劑,通過氫氧化鈉用量調(diào)整還原劑還原動(dòng)力,對(duì)氯化銀膠體進(jìn)行還原制備粒徑不同的晶種;并將自制晶種添加到亞微米銀粉反應(yīng)體系中,人為分配新生銀原子在核化過程和生長過程中的吸附量,實(shí)現(xiàn)亞微米級(jí)銀粉粒徑可控制備。掃描電鏡結(jié)果分析表明:通過調(diào)節(jié)氫氧化鈉用量可實(shí)現(xiàn)粒徑20-100 nm納米粉體的可控制備;通過調(diào)節(jié)銀鹽用量、晶種大小和用量可實(shí)現(xiàn)粒徑145-315 nm亞微米級(jí)粉體的可控制備。在微米銀粒徑可控制備中,建立以銀鹽用量、體系酸堿度和分散劑用量為參變量的可控制備模型。以抗壞血酸為還原劑、PVP為分散劑,在40°C水浴中,還原硝酸銀。通過調(diào)節(jié)各工藝參數(shù),探究其對(duì)粒徑的影響規(guī)律,并利用此規(guī)律,得到粒徑可控的銀粉。掃描電鏡結(jié)果分析表明:粉體粒徑隨著硝酸銀濃度、分散劑用量的增大而增大;以pH=4為等電位點(diǎn),粉體粒徑隨體系酸堿度與等電位點(diǎn)的差值增大而減小。最后,本文用自制的銀粉制備導(dǎo)電油墨,對(duì)其進(jìn)行了初步研究,結(jié)果表明:以自制銀粉制備導(dǎo)電油墨,其導(dǎo)電性基本滿足油墨應(yīng)用條件,在印刷電路技術(shù)上有著一定的應(yīng)用前景。
[Abstract]:In recent years, the scientific and technological power based on micro-nano research is catalyzing revolutionary changes in the industrial field. As a new functional material, micro-nano materials have excellent electrical and chemical properties. The study shows that the excellent properties and applications of nanocrystalline silver powder are affected by a series of physical parameters such as crystal structure, morphology, particle size, particle size distribution, dispersion and so on. It is of great theoretical and practical significance to realize the controllable preparation of nanocrystalline silver powder, and the process of controlling the morphology of silver powder is becoming more and more mature. To a certain extent, the properties of silver powder were regulated. In this paper, the micronano silver powder with different particle size was prepared in water phase by chemical reduction method. The controlled preparation of silver powder particle size was realized, and the properties of silver powder were further controlled. Optimization. In this thesis, a controllable preparation model was established in which the amount of silver salt, the size and amount of seed were used as parameters, and ascorbic acid as reducing agent PVP was used as dispersant in the controlled preparation of silver nanoparticles. Through the amount of sodium hydroxide to adjust the reducing power of reducing agent, the silver chloride colloid was reduced to prepare the seed with different particle size. The self-made seeds were added to the sub-micron silver powder reaction system, and the adsorption amount of the new silver atoms in the nucleation and growth process was artificially distributed. The results of scanning electron microscopy showed that the controlled preparation of 20 ~ 100 nm nano-powders could be achieved by adjusting the amount of sodium hydroxide. By adjusting the amount of silver salt, the size and amount of crystal seed can be controlled preparation of 145-315 nm submicron powder. In the controlled preparation of micron silver particle size, the amount of silver salt can be established. The controlled preparation model of the system with pH and dispersant dosage as parameters. Using ascorbic acid as reducing agent PVP as dispersant, silver nitrate was reduced in water bath of 40 擄C. various technological parameters were adjusted. The effect of silver powder on the particle size was studied and the controlled size silver powder was obtained. The results of SEM showed that the particle size increased with the increase of the concentration of silver nitrate and the amount of dispersant. With pH=4 as the equipotential point, the particle size decreases with the increase of the difference between the pH and the equipotential point of the system. Finally, the conductive ink is prepared with self-made silver powder and studied preliminarily. The results show that the electric conductivity of conductive ink prepared from self-made silver powder basically meets the requirements of ink application and has a certain application prospect in printing circuit technology.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB383.1;TS802.3

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相關(guān)期刊論文 前1條

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本文編號(hào)：1395578