本文關(guān)鍵詞： 化學還原鍍法 Cu@Ag Al@Ag 導電性能 抗氧化性能 柔性電熱膜　出處：《華東師范大學》2017年碩士論文　論文類型：學位論文

【摘要】：銀由于具有良好的電熱性能可以被應用于許多領(lǐng)域,但其因價格昂貴,無法得到廣泛使用。銅、鋁等材料因具有與銀相似的導電導熱性能且價格便宜而應用廣泛,但是銅、鋁化學性質(zhì)較活潑,暴露在空氣中易被氧化而影響導電能力。因此,提出在銅、鋁表面包裹一層銀,制備成銀包銅(Cu@Ag)和銀包鋁(Al@Ag)核殼顆粒,既降低了成本,又實現(xiàn)了良好的導電性。本論文采用化學還原鍍法成功制備了 Cu@Ag和Al@Ag核殼顆粒,并利用掃描電子顯微鏡(SEM)、X射線衍射譜(XRD)、透射電子顯微鏡(TEM)、熱重分析(TG)、四探針等測試手段對產(chǎn)物的形貌、結(jié)構(gòu)及電性能進行了表征,獲得了銀包裹層可控、高導電、熱穩(wěn)定性良好且適合于導電漿料的雙金屬填充材料。通過乙二醇還原法制備的Cu@Ag樣品包覆均勻,導電性能良好,壓實電阻僅為1.6Ω/□,長期放置在空氣中后表現(xiàn)出良好的抗氧化性能;一步還原法制備的銅銀復合顆粒,阻值僅為0.74Ω/□,具有良好的抗氧化性能和熱穩(wěn)定性�？焖龠�原法制備的Al@Ag核殼顆粒,克服了微納級鋁粉在空氣中放置不導電的問題,實現(xiàn)了阻值為30Ω/□的導電性能。納米銀漿因良好的電熱性能被廣泛應用于柔性電阻加熱膜中。實驗中用Cu@Ag核殼顆粒摻雜銀漿制備的加熱膜,在低壓5V驅(qū)動的條件下實現(xiàn)了較好的膜加熱功能。實驗結(jié)果表明,縱向排布的電極加熱均勻性更佳。所制電熱膜在低溫0℃環(huán)境下,實現(xiàn)了平均30℃以上的載體溫升,為納米雙金屬復合顆粒在柔性印刷電子領(lǐng)域的應用奠定了基礎(chǔ)。
[Abstract]:Silver can be used in many fields because of its good electrothermal properties, but it can not be widely used because of its high price. Aluminum and other materials have been widely used because of their similar conductivity and thermal conductivity as silver, but copper and aluminum are more active in chemistry and easily oxidized in air. Therefore, copper is proposed in copper. The core-shell particles were prepared by coating a layer of silver on the surface of aluminum and preparing the core-shell particles of silver coated copper (Cu@ Ag) and silver-clad aluminum (Albd), which reduced the cost. In this thesis, Cu@Ag and Al@Ag core-shell particles were successfully prepared by electroless reduction plating and SEM). The morphology, structure and electrical properties of the products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and four-probe. Bimetallic filler materials with controllable silver coating, high conductivity, good thermal stability and suitable for conductive paste were obtained. The Cu@Ag samples prepared by ethylene glycol reduction method were coated uniformly and had good conductivity. The compaction resistance is only 1.6 惟 / -, which shows good oxidation resistance after being placed in air for a long time. The copper-silver composite particles prepared by one-step reduction method, with a resistance of 0.74 惟 / -, have good oxidation resistance and thermal stability. The Al@Ag core-shell particles prepared by rapid reduction method have good oxidation resistance and thermal stability. It overcomes the problem that micro-nano grade aluminum powder is placed in air without conducting electricity. The nano-silver paste was widely used in the flexible resistance heating film because of its good electrothermal properties. In the experiment, the Cu@Ag core-shell particle doped silver paste was used to prepare the heating film. The film heating function is realized under the condition of low voltage 5V drive. The experimental results show that the electrode with longitudinal arrangement has better heating uniformity, and the electrothermal film is prepared at 0 鈩，

本文編號：1445079