DC 欄位 | 值 | 語言 |
dc.contributor.author | 林招松 | zh_TW |
dc.creator | 林招松 | - |
dc.date | 2005 | zh_TW |
dc.date.accessioned | 2006-07-25T10:43:29Z | - |
dc.date.accessioned | 2018-06-28T22:04:35Z | - |
dc.date.available | 2006-07-25T10:43:29Z | - |
dc.date.available | 2018-06-28T22:04:35Z | - |
dc.date.issued | 2005 | - |
dc.identifier | 932216E002020 | zh_TW |
dc.identifier.uri | http://ntur.lib.ntu.edu.tw//handle/246246/12493 | - |
dc.description.abstract | 本研究於鹽酸溶液中探討電源波形及硫酸根對低壓陽極鋁箔交流電蝕之孔蝕行為的影響。利用動態循環伏安法(GVP)量測試片
表面反應電壓對應電流和週期數的關係,以掃描式電子顯微鏡(SEM)觀察鋁箔表面形貌和橫截面蝕孔蝕孔形狀,並加以統計線密度、穿蝕深度。使用穿透式電子顯微鏡(TEM) 觀察橫截面試片,分析蝕孔內部微結構,進ㄧ步使用化學能譜儀(XPS)分析表面鍵結狀況。
研究結果顯示方波為電蝕較有效率之波形,電蝕後穿蝕深度最深、表面蝕孔較大、溶蝕量較多、表面腐蝕生成物較厚等特點。
由電化學量測可得知其單一電量和累積電量比三角波和正弦波多。鹽酸電解液中添加適量硫酸根導致蝕孔穿蝕深度變小,使蝕孔細緻均勻,減少表層未具蝕孔鋁掉落的機率,且由XPS 結果發現增加硫酸根造成的表層吸附硫酸根的量增加,使得氯離子因競爭吸附而導致蝕孔大小及穿蝕模式改變。對此結果歸納整理並提出合理機制。 | zh_TW |
dc.description.abstract | The effects of current waveforms and
sulfate ions on pitting behavior of aluminum
foils for low-voltage electrolytic capacitor were
investigated during etching in hydrochloric acid.
During the course of etching, the
galvanodynamic polarization curve was
recorded, in which the breakdown potential was
measured. A scanning electron microscope
was employed for characterizing the surface
morphology and cross section of the foil,
including the average depth and linear density
of the pits. Cross-sectional transmission
electron microscope specimens were prepared
from the as-etched foil to reveal the detailed pit
morphology and etch film structure. Finally,
X-ray photoelectron spectra of the surface film
on the as-etched foil were measured using an
ESCA250 (VG Science Inc., UK) spectrometer
with monochromatic Mg K radiation.
Experimental results indicate that
compared with the triangular and sinusoidal
waveforms, etching with the square current
waveform resulted in larger and deeper pits,
thicker etch films, and more weight lost during
etching. This is due to the more charge
imposed in each anodic half-cycle associated
with the square waveform. The presence of
sulfate ions in hydrochloric acid led to the
formation of finer, uniformly-distributed and
shallower pits; thereby, reducing the loss of
aluminum due to undermining by the cubic pits.
The effect of sulfate ions on the pitting
behavior was presumably due to competitive
adsorption of sulfate ions with chloride ions, as
shown by XPS analysis. | en |
dc.format | application/pdf | zh_TW |
dc.format.extent | 475432 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language | zh-TW | zh_TW |
dc.language.iso | zh_TW | - |
dc.publisher | 臺北市:國立臺灣大學材料科學與工程學系暨研究所 | zh_TW |
dc.rights | 國立臺灣大學材料科學與工程學系暨研究所 | zh_TW |
dc.subject | 動態循環伏安法 | zh_TW |
dc.subject | 化學能譜儀 | zh_TW |
dc.subject | 競爭吸附 | zh_TW |
dc.subject | 低壓陽極鋁箔 | zh_TW |
dc.subject | galvanodynamic polarization curve | en |
dc.subject | X-ray photoelectron spectra | en |
dc.subject | competitive adsorption | en |
dc.subject | aluminum foils for low-voltage electrolytic capacitor | en |
dc.title | 改善鋁箔蝕孔密度與均勻性之電源波形設計 | zh_TW |
dc.type | report | en |
dc.identifier.uri.fulltext | http://ntur.lib.ntu.edu.tw/bitstream/246246/12493/1/932216E002020.pdf | - |
dc.coverage | 計畫年度:93;起迄日期:2004-08-01/2005-07-31 | zh_TW |
item.languageiso639-1 | zh_TW | - |
item.cerifentitytype | Publications | - |
item.fulltext | with fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_93fc | - |
item.openairetype | report | - |
item.grantfulltext | open | - |
crisitem.author.dept | Materials Science and Engineering | - |
crisitem.author.parentorg | College of Engineering | - |
顯示於: | 材料科學與工程學系
|