electron diffusion 中文意思是什麼
electron diffusion
解釋
電子擴散-
The diffusion welding behavior of single - crystalline cu to single - crystalline - aio with a nb film interlayer and the joint microstructure properties were studied by tem, sem / eds analyses and four - point bend testing. the nb film interlayer deposited by electron beam evaporation on the ceramic side prior to diffusion welding was found to be olycrytalline and fiber - textured after diffusion bonding, with the close - packed plane ( 110 ) being parallel to the ( 0001 ) basal plane of - aio
擴散連接技術是一門邊緣科學，涉及材料、擴散、相變、界面反應、接頭應力應變等各種行為，工藝參數多，雖然已經進行了大量的試驗研究，但卻對各種材料的連接機理尚未有明確的認識，為此人們試圖藉助于計算技術，對接頭行為進行數值模擬，以便找到共同規律，對擴散連接過程及質量進行預測與實時控制。 -
Research interest : surface science ; kikuchi electron holography ; electron multiple - scattering techinques ; molecular dynamical simulations ; ab initio total energy calculations ; self - diffusion on metal surfaces ; dissociative adsorption of h2 on metal surfaces
研究興趣:表面科學，電子全像術，電子多重散射分析理論技術，分子動力學模擬，第一原則總能量計算，表面原子動態學，氫分子的解離吸附。 -
Based on the energy band characteristics of ordinary negative electron affinity emitter gaas, the design of lengthening the diffusion lengths of negative electron affinity emitter gaas was presented, and the special negative electron affinity emitter gaas was designed
摘要根據通常負電子親和勢二次電子發射材料砷化鎵的能級特點，提出延長負電子親和勢二次電子發射材料砷化鎵的逸出深度的理論設計，設計出了特殊的負電子親和勢二次電子發射材料砷化鎵。 -
Oxygen diffusion transport and electrochemical reaction in the oxygen cathode of alkaline fuel cell ( afc ) and pemfc have been expressed with the tffa model, including oxygen transferring in gas channel of gas diffusion layer and reaction layer, oxygen dissolution and diffusion in thin - film of reaction layer, oxygen reaction and diffusion in flooded - agglomerate of reaction layer and the conduction of electron and ion. numeric algorithm of the model equations is also obtained
本文將tffa模型應用於堿性燃料電池（ afc ）和質子交換膜燃料電池（ pemfc ）陰極，推導出陰極各種傳遞和反應過程的描述方程，包括氧氣在氣體擴散層和反應層氣體通道中的擴散，氧氣在反應層薄膜中的溶解和擴散，氧在反應層浸漬聚集體中的反應和擴散以及電子和離子的傳導，並給出方程的數值解法。 -
The investigation presents a new method of dipping sic kiln furniture into 2 saturable solution or into the saturable solution of ca3 ( po4 ) 2 and a1po4 in order to beneficial to its crystalline structure change and its properties, to make it packed and decrease its porosity. it can also hinder the diffusion of oxygen so as to decrease the oxidation rate and lengthen the useful life. the mechanism of dipping two kinds of phosphate saturable solution were studied and proved by the results of scanning electron microscope
本研究首次採用sic窯具材料浸漬ca _ 3 （ po _ 4 ） _ 2飽和溶液和浸漬ca _ 3 （ po _ 4 ） _ 2與alpo _ 4混合飽和溶液的方法，目的在於有利於窯具材料晶相結構的轉化和性能的優化；能堵塞材料的氣孔，降低透氣率，阻礙o _ 2擴散，降低氧化速度，延長窯具材料的使用壽命。 -
This research has studied the microstructure of cathode materials systematically by the means of high resolution transmission electron microscopy and scanning electron microscopy, surveyed the electron emission performance of la2o3, - mo, la2o3 - y2o3 - mo, la2o3 - sc2c > 3 - mo cathode with the self - designed electron emission surveyor and analyzed the elements changing of the surface of mo - la2o3 - sc2c > 3 cathode in - situ. while it was heated to different temperature. at last, the relationship of the microstructure of cathode, diffusion of active matter and electron emission performances has been discussed
本研究採用高分辨掃描電鏡、透射電鏡對稀土鉬鎢陰極材料的顯微結構進行了系統研究；利用本課題研究組設計研製的電子發射測量儀對la2o3 - mo ， la2o3 - sc2o3 - mo ， la2o3 ? y2o3 - mo三種陰極（以下稱鑭?鉬陰極、鑭鈧?鉬陰極、鑭釔?鉬陰極）的發射性能進行了測量；利用經改造后的俄歇電子能譜儀「原位」分析了發射性能較好的鑭鈧鉬陰極在不同溫度下表面活性元素的變化情況。 -
There are distinct changes about shifts or intensity in bulk plasmon, surface plasmon, and interband electron transitions losses as a result of oxidation of specimens, and adsorption and oxidation processes can be studied through these changes. at room temperature, the formation of oxide layers on uranium and uranium - niobium alloys were found to occur rapidly upon exposure to oxygen, and the resultant oxide in each case was near - stoichiometric uo2. due to formation of niobium oxide in uranium - niobium alloys, the diffusion of o ~ ( - ) ( o ~ ( 2 - ) ) and u ~ ( 4 + ) in the interface region was prevented, and the corrosion resistance of uranium - niobium alloys to oxygen is greatly enhanced by alloying with niobium
研究結果表明：清潔表面鈮和鈾的體等離子體振蕩所造成的電子能量損失的實驗值與理論計算值較為符合；隨著氧化程度的加劇，表面等離子體（ sp ） 、體等離子體（ bp ）以及價帶電子躍遷所造成電子能量損失的譜峰發生了明顯的連續偏移或強度的變化，這些變化可以用來分析鈾及鈾鈮合金的初始氧化過程；室溫下，鈾及鈾鈮合金很容易與氧作用，最終結果，鈾僅氧化為二氧化鈾，另外，在鈾鈮合金氧化過程中，因為有鈮的氧化物存在，不利於氧和鈾在界面擴散，增強了鈾鈮合金抗氧化性能； eels能獲得樣品表面的信息比aes更為表面，更為靈敏，但由於eels的譜線過于集中，主要在幾十ev以內，也有不容易區別和解譜的不足。 -
We have also calculated the resolution of the lclv according to the electrical field and the electron diffusion theory. it shows that the limiting resolution of 501p / mm can be obtained in our lclv
對液晶光閥的解析度的分析，主要計算了光閥厚度、電場以及電荷擴散對光閥解析度的影響，從理論上得到制備的液晶光閥解析度應大於501p / mm的極限解析度。 -
The properties of these doped powders, the microstructure and composition of these rare - earth co - doped tungsten matrices and cathodes have been investigated by size analysis, xrd, sem and edax. the electronic emission performances of these cathodes are measured in uhv electron emission surveyor. aes is adopted to analyze the atom composition and diffusion behavior of active elements on cathode surfaces
通過粒度分析、 xrd 、 sem 、 edax研究了摻雜粉末的特性、燒結基體和陰極的微觀結構和成分;用動態真空電子發射測試儀對上述陰極進行了電子發射水平的測試;採用aes對陰極表面原子組成和活性物質的擴散行為進行了研究，分析了陰極發射水平與表面原子組成的關系。
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