臺灣博碩士論文加值系統

中文摘要
本實驗以無電鍍鎳法製備鎳密封鍍層光纖。實驗製程條件包含改變鍍液的次磷酸鈉含量、起始pH值、析鍍溫度和析鍍時間等，並以光學顯微鏡、掃描式電子顯微鏡與原子力顯微鏡，分別觀察鎳鍍層光纖的表面狀態、鍍層的膜厚及表面粗度。由光學顯微鏡觀察得知當次磷酸鈉含量為20g/L、起始pH值為4.0與析鍍溫度為80℃時，析鍍的鎳密封鍍層光纖有較平整的表面。於此製程條件下更改析鍍時間，分別製備出膜厚為35 nm、65 nm、119 nm、218 nm、308 nm、419 nm、565 nm的鎳鍍層光纖。經由原子力顯微鏡的量測得知，當膜厚為65 nm時，有最低的表面粗度，其平均粗度Ra為0.551 nm。將鎳鍍層光纖浸入液態氮一天後，經由光學顯微鏡觀察應力誘發的裂縫，發現膜厚為65 nm、119 nm及218 nm的試片表面有較少的應力誘發裂縫。光纖的拉伸強度我們可藉由拉伸試驗獲得，膜厚為65 nm、119 nm及218 nm時有最大的拉伸強度。

Abstract
In this experiment, hermetically nickel-coated optical fibers were prepared by electroless plating method. The experimental process includes changing the sodium hypophosphite concentration, initial pH value, plating time, and plating temperature. The surface appearance, film thickness and surface roughness of nickel coatings were investigated using the optical microscope (OM), scanning electron microscope (SEM) and atomic force microscope (AFM) , respectively. The OM observation shows that if the concentration of sodium hypophosphite is 20g/L, the plating temperature is 80℃, and the initial pH value is 4.0, the nickel-coated optical fiber has the best smooth surface. Using the above experimental conditions, the nickel coatings were uniformly deposited on the glass fiber surface by controlling the plating time, and the coating thicknesses of 35, 65, 119, 218, 308, 419 and 565 nm were obtained. The AFM measurement reveals that if the Ni film thickness is 65 nm, the surface roughness of nickel coating has the lowest value, and its surface roughness is 0.551 nm. After nickel-coated optical fibers immersed in the liquid nitrogen for one day, the stress induced voids on the surface of nickel coatings were observed using the optical microscope. It is found that if coating thicknesses are 65 nm, 119nm and 218 nm, minimum number of stress voids was induced in the nickel coatings. Finally, the tensile strengths of nickel-coated optical fibers were measured by tensile test. The result shows that if the thicknesses are 65 nm, 119 nm and 218 nm, nickel-coated optical fibers have maximum tensile strengths.

Keywords: electroless plating method, hermetically coatings, optical fiber, nickel.

總目錄
誌謝 I
中文摘要 II
Abstract III
總目錄 V
圖目錄 VII
表目錄 VIII
第一章 緒論 1
第二章 無電鍍鎳簡介 10
2-1 無電鍍鎳反應機構 11
2-2 無電鍍鎳組成 12
2-3 無電鍍鎳鍍層的內應力 18
2-4 無電鍍鎳鍍層結構與特性 19
2-5 無電鍍鎳的應用 21
2-6 無電鍍鎳複合鍍層簡介 23
第三章 實驗步驟 24
3-1 試片準備 25
3-2 玻璃光纖前處理 25
3-3 鎳鍍層光纖製備 27
3-3-1 製程條件(一) ：改變鍍液中次磷酸鈉含量 28
3-3-2 製程條件(二) ：改變析鍍溫度 29
3-3-3 製程條件(三) ：改變鍍液起始pH值 29
3-3-4 製程條件(四) ：改變鍍層厚度 29
3-4 EDS、XRD 30
3-5 SEM、OM 30
3-6 低溫測試 31
3-7 拉伸試驗 32
3-8 AFM 33

第四章 結果與討論 35
4-1 次磷酸鈉對鍍層成分、微結構及表面型態的影響 35
4-2 析鍍溫度對鍍層表面型態之影響 41
4-3 鍍液pH值對鍍層表面型態之影響 45
4-4 鍍層厚度對鍍層表面型態之影響 50
4-5 鍍層厚度對表面粗度之影響 56
4-6 鍍層厚度對拉伸強度之影響 62
4-7 低溫環境試驗 64
第五章 結論 68
參考文獻 70

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