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Student Number 87323122
Author Chan-Nan Yu(余建男)
Author's Email Address No Public.
Statistics This thesis had been viewed 2069 times. Download 1420 times.
Department Mechanical Engineering
Year 1999
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title 由銀廢料製備電極用銀粉之實驗放大製程研究
Date of Defense 2000-07-17
Page Count 163
Keyword
  • magnify process
  • recycle
  • silver
  • wastes of silver
  • Abstract Silver recycling from silver-containing waste has been studied in this work to prepare powder for manufacturing the silver electrode used in batteries. Experimented parameters such as reaction temperature,reactant concentration,and surfactant concentration were varied to find out an optimum condition to produce silver powder in a capacity 0.6kg/h.
    The results demionstrated that : (1)the production rate of silver powder increases with increasing the reaction temperature; (2)the capacity increases with increasing the concentration of Ag(NH3)2+;(3)the yield of silver powder can be enhanced by decreasing the concentration of surfactant ; (4)it is better to mix the reactant at lower temperatures than at room temperature to assure the operation of the mixer ; (5)the waste liquid can be re-use 3 cycles , disposed with KMnO4 to follow the emission regulation ; (6)the purity of the silver powders produced from this process is 99.9%.
    It was also found that the experimented parameters influence the powder properties. The average particle size of silver powders increase with increasing the reaction temperature and Ag(NH3)2+ concentration , however,the powder densities(apparent density and tap density)are unaffected. Addition of surfactant such as caprylic acid and ethanoltriamine decreases the powder densities.In the presence of caprylic acid, the average particle size of the silver powders produced decreases with increasing the reaction temperature, thus increasing the specific surface area of the powder.
    The heat-treated silver powders(at temperature>350℃)are more suitable for use in electrode application because the shrinkage can almost be neglected in the process of electrode preparation. The discharge efficiencies for the silver electrode made of all the silver powders are higher than 70%, thus they are satisfactary in bettery application.
    Table of Content 目 錄
    頁碼
    誌謝I
    摘要(中文)II
    摘要(英文)III
    目錄V
    表目錄VII
    圖目錄IX
    壹、前言1
    貳、文獻回顧與理論說明3
    2.1銀粉的產製方法3
    2.2化學還原法產製銀粉4
    2.3氧化還原反應動力學基本原理5
    2.3.1反應速率的量測5
    2.3.2反應級數5
    2.3.3氨銀與聯胺之氧化還原反應機理7
    2.3氧化還原的電子轉移8
    2.4結晶理論11
    2.4-1成核理論11
    2.4-2成長理論16
    2.5分散與凝集原理18
    2.5-1分散原理19
    2.5-2凝集原理19
    參、實驗方法及裝置21
    3.1實驗流程21
    3.1.1流程改進探討21
    3.1.1-1提高流程容量及產率方面21
    3.1.1-2廢液測試及再使用21
    3.1.2粉末特性評估21
    3.1.3電極片試作及充放電測試21
    3.2銀粉製備22
    3.3粉末性質鑑定與測試24
    3.4銀電極製作與測試27
    肆、結果28
    4.1產製銀粉時反應溫度與反應時間之關係28
    4.2銀粉產率之關係29
    4.3銀粉密度與反應參數之關係30
    4.3.1密度(視密度與振實密度)30
    4.3.2銀粉雜質33
    4.3.3平均粒徑(P.S.)及比表面積(S.A.)34
    4.3.4銀粉粉末之SEM觀察37
    4.3.5銀粉粉末之TGA40
    4.3.6銀粉粉末之外觀及收縮率41
    4.4銀鋅電池之放電測試42
    伍、討論44
    5.1銀粉產製過程中,反應級數推定44
    5.2系統溫度與界面活性劑對銀粉產率之影響44
    5.3系統溫度與界面活性劑對銀粉性質之影響46
    5.4氨銀濃度對銀粉性質之影響50
    5.5還原劑(聯胺)濃度對銀粉性質之影響51
    5.6熱處理對銀粉性質之影響52
    5.7廢液重複使用對銀粉性質的影響53
    陸、結論及未來展望55
    參考文獻57
    附表61
    附圖71
    Reference 1. 吳俊億, "電子工業用微細銀粉之還原製備研究" ,國立中央大學機械工程研究所碩士論文(1992)

    2. 王文鑽, "還原法產製銀粉之研究" ,國立中央大學機械工程研究所碩士論文(1993)

    3. 鄧永寶, "化學還原共沉法製備微細銀鈀合金粉末" ,國立中央大學機械工程研究所碩士論文(1994)

    4. 陳能開, "含Pd5-30%之Ag-Pd共沉粉末製備研究" ,國立中央大學機械工程研究所碩士論文(1995)

    5. 林景崎、吳俊億、李勝隆, "可控制表面積之微細銀粉還原新製程",美國專利權號數第5413617號。
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    10. 楊健明,"銀鋅電池之銀極廢料回收-製備銀粉之可行性研究", 國立中央大學機械工程研究所碩士論文(1998)

    11. 張惠芳,1993,"銀鋅電池的概況與特質分析",科儀新知第十四卷第五期
    12. 伍祖璁、黃錦鐘,1994,"粉末冶金",高立圖書有限公司
    13. Short,O.A.;Metechem Silver Powder and Method for Producting Same.U.S. Pat.2752237,1956.
    14. Montino,F.;Monferrato,C.;Colombo,L.A.Process for Preparation of Silver Powder.U.S. Pat.4039317,1977.
    15. Jost,E.M.;Mass,P.Method of Making Fine Silver Powder.U.S.Pat.4456473,1984a.
    16. Jost,E.M.;Mass,P.Method of Making Fine Silver Powder.U.S.Pat.4456474,1984b.
    17. R.A.Marcus,"On the Theory of Oxidation-Reduction Reations Involving Electron Transfer",The Journal of Chemical Physics Vol,24,(1956)966-978.
    18. R.D.Cannon,"Electron Transfer Reactions",Butter Worth and Co Ltd(1980)34-181.
    19. Evgenii V.Khamskii,"Crystallization From Solutions",Consultants Bureau,New York(1969)3-36.
    20. J.Heicklen,"Collid Formation and Growth",Academic Press,New York(1976)57-97.
    21. Jaroslav Nyvlt,Otakar Sohnel,Marie Matuchova,Miroslav Broul,The Kinetic of Industrial Crystallization",Elsevier Science Publishers,New York(1985)35-213.
    22. Gordon R.Youngguist,editor,"Advances in Crystallization from solution",American Institute of Chemical Engineers,New York(1984)45-50.
    23. R.E.Reed-Hill & R.Abbaschian,"Physical Metallurgy Principles",3rd Edition(1992)487-489.
    1. 趙承琛,"界面科學基礎",復文書局(1993)163-183,212-214.
    1. 趙承琛,"界面科學基礎",復文書局(1993)163-183,212-214.
    26. W.D.Kingery,"Powder Preparation",in"Ceramic Powders:Preparation,Consolidation and Sitering",Materials Science Mongaphs 16,ed.P.Vincezini,Amsterdam-Oxford-New York(1983)3-18.
    26. W.D.Kingery,"Powder Preparation",in"Ceramic Powders:Preparation,Consolidation and Sitering",Materials Science Mongaphs 16,ed.P.Vincezini,Amsterdam-Oxford-New York(1983)3-18.
    28. "Standard Test Method for Apparent Density of Powder of Refractory Metal and Compounds by the Scott Volumeter",ASTM B 329-85
    29. "Standard Test Method for Tap Density of Powder of Refractory Metal and Compounds by Tap-Pak Volumeter",ASTM B 527-85
    30. "水質分析",李俊福博士.
    31. S.Lowell,Joan E.Shields,"Powder Surface Area and Porosity",PRENTICE-HALL,Inc.(1984).
    31. S.Lowell,Joan E.Shields,"Powder Surface Area and Porosity",PRENTICE-HALL,Inc.(1984).
    33. J.O'M. Bockris & D.M.Drazic, "Electro-chemical Science",Barnes Noble books,(1972).
    Advisor
  • Jing-Chie Lin(林景崎)
  • Files
  • 87323122.pdf
  • approve immediately
    Date of Submission 2000-07-17

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