波多野结衣中文无码,一区二区三区中文字幕人妻,日本福利一区二区三区四区,久久er99精品国产一区

官方微信|手機版

產(chǎn)品展廳

產(chǎn)品求購企業(yè)資訊會展

發(fā)布詢價單

化工儀器網(wǎng)>產(chǎn)品展廳>物理特性分析儀器>表面/界面性能測定儀>開爾文探針系統(tǒng)> 專業(yè)銷售 英國Uniscan Instruments SKP370 ...

分享
舉報 評價

專業(yè)銷售 英國Uniscan Instruments SKP370 掃描開爾文探針系統(tǒng)

具體成交價以合同協(xié)議為準

聯(lián)系方式:錢經(jīng)理查看聯(lián)系方式

聯(lián)系我們時請說明是化工儀器網(wǎng)上看到的信息,謝謝!


北京恒遠安諾科技有限公司,十多年來專注于儀器儀表及各種工業(yè)品進出口.

進口儀器儀表

SKP370

Scanning Kelvin Probe System

The Scanning Kelvin Probe (SKP) is a non-contact, non-destructive instrument designed to measure the surface work function difference between conducting, coated, or semi-conducting materials and a metallic probe. The technique operates using a vibrating capacitance probe, and through a swept backing potential, the work function difference is measured between the scanning probe reference tip and sample surface. The work function can be directly correlated to the surface condition. A unique aspect of the SKP is its ability to make measurements in a humid or gaseous environment.  Applications include: -

 
scanning kelvin probe 
Figure 1
  • Filiform corrosion studies
  • Transport process of hydrated ions
  • Study of fuel cell catalysts
  • Forensic detection of fingerprints
  • Charaterisation of photovoltaic materials
  • Femi-level mapping

The principle of operation of the Kelvin Probe is illustrated in Figure 1.

The figure represents three energy level diagrams depicting two metals having a constant separation, work functions and Fermi levels of (φ1, E1) and (φ2, E2), respectively.

The first diagram shows the metals with no electrical contact and differing Fermi levels. When electrical contact is made (middle diagram) the flow of charge allows the Fermi levels to equalize and gives rise to a surface charge.

 

The potential difference, VC, is related to the difference in work function:

-eVC = φ1 - φ2 (1) where e is the electron charge.

The inclusion of an external backing potential, VB (final diagram), allows for a nulling of the surface charge at a unique point where VB = - VC. This point represents the work function difference between the two materials.  Work function can then be used to determine the corrosion potential (Ecorr) at a specific point using the relationship:

Ecorr = Constant + (φ1 - φ2) (2) where (φ1 - φ2) is the measured work function between the probe and the sample. 

 
filiform corrosion 
Figure 2

The constant can be determined by measuring the corrosion potential using a conventional reference electrode in an electrolyte. Once the constant is known for a particular sample, Ecorr can be calculated directly from the SKP data without an electrolyte.

 

Figure 2 shows the Scanning Kelvin Probe Measurement of filiform corrosion on Aluminium

 
 

Figure 3

Figure 3 shows a surface map of the Scanning Kelvin Probe signal recorded over the heat affected zone of welded material.

 
 

Figure 4


 

Figure 4 shows a surface map of the Scanning Kelvin Probe signal recorded over a printed circuit board.

如果您對本品感興趣請與我公司
北京東方安諾生化科技有限公司
:    -8007


: www.annovatech.com
: caoye513



化工儀器網(wǎng)

采購商登錄
記住賬號    找回密碼
沒有賬號?免費注冊

提示

×

*您想獲取產(chǎn)品的資料:

以上可多選,勾選其他,可自行輸入要求

個人信息:

溫馨提示

該企業(yè)已關(guān)閉在線交流功能

国产精品不卡在线视频| 国产又大又长又粗又猛视频| 人之初av一区二区三区| 国产精品一区二区无久久久| 99久久精品视香蕉蕉| 成人亚洲精品一区二区| 国产综合精品久久久久成人蜜臀| 人人妻人人澡av天堂香蕉| 亚洲欧美日韩亚洲欧美| 国产乱老熟女乱老熟女视频| 亚洲精品在线观看日韩电影| 国产亚洲视频中文字幕97精品| 亚洲国产午夜精品不卡| 国产第一页久久亚洲| 99久久精品国产一区二区三区?| 日本成人免费一区二区三区| 国产精品欧美激情青草| 亚洲国产电影一区二区三区| 日本一区二区三区综合| 欧美日韩一区二区中文字幕| 四虎成人精品一区二区| 四虎国产精品成人免费久久| 国语自产拍无码精品视频在线| 亚洲一道本中文字幕一区二区| 99久久精品视香蕉蕉| 97精品国产综合久久| 91香蕉在线观看影视| 亚洲精品成人在线播放| 夜鲁夜鲁在线视频维| 欧美激情国产精品视频一区| 亚洲国产精品午夜在线| 日本阿v不卡在线观看视频| 中文字幕亚洲日韩欧美色| 亚洲精品国产第一区三区| 亚洲午夜久久久久噜噜噜| 亚洲欧美中文在线另类| 五月婷婷六月丁香免费视频| 91久久久久人妻精品专区| 99久久国产亚洲精品美女| 亚洲国产精品无码av| 欧美做爰猛烈大尺度|