solid diffusion 中文意思是什麼
solid diffusion
解釋
固體擴散-
The effects of the fabrication conditions on the crystal structure, grain size, micromorphology and electrochemical performance of these materials have been studied in depth. the reaction mechanism of the low - heating solid - state reaction method has also been investigated. in addition, a novel electrochemical method ( rpg method ) based on the concept of " ratio of potentio - galvano - charge capacity " has been for the first time developed to determine the diffusion coefficient of lithium - ion within insertion - host materials on the basis of the spherical diffusion model
本論文較系統地考察了低熱固相反應法合成鋰離子電池正極材料的可行性問題，研究了工藝條件對材料的晶體結構、晶粒尺寸、微觀形貌及電化學性能等的影響，探討了低熱固相反應的機理，並通過引進「恆壓-恆流充電容量比」的概念，給出了一種測定鋰離子嵌入脫出固相擴散系數的新方法。 -
At the initial stage of planar technique, b was employed as ideal diffusion impurity in base - region of npn si planar devices because of the match of its solid - solubility and diffusion coefficient in si with those of p in emission - region, and the good shield effect of sio2 film to b. but because of the relatively large solubility ( 5 1020 / cm3 at 1000 ) and the small diffusion coefficient, the linear slowly - changed distribution of acceptor b in pn junction can not be formed, which could not cater to the requirement of high - reversal - voltage devics. thereafter b - a1 paste - layer diffusion technology and close - tube ga - diffusion technology had been developed, while the former can lead to relatively large the base - region deviation and abruptly varied region in si, which caused severe decentralization of current amplification parameter, bad thermal stability and high tr ; the latter needed the relatively difficult pack technique, with poor repeatability, high rejection ratio, and poor diffusion quality and productio n efficiency
在平面工藝初期，由於b在硅中的固溶度、擴散系數與n型發射區的磷相匹配， sio _ 2對其又有良好的掩蔽作用，早被選為npn硅平面器件的理想基區擴散源，但b在硅中的固溶度大（ 1000時達到5 10 ~ （ 20 ） ，擴散系數小， b在硅中的雜質分佈不易形成pn結中雜質的線性緩變分佈，導致器件不能滿足高反壓的要求，隨之又出現了硼鋁塗層擴散工藝和閉管擴鎵工藝，前者會引起較大的基區偏差，雜質在硅內存在突變區域，導致放大系數分散嚴重，下降時間t _ f值較高，熱穩定性差；後者需要難度較大的真空封管技術，工藝重復性差，報廢率高，在擴散質量、生產效率諸方面均不能令人滿意。 -
Abstract : a new simulating method is established for the calcul ation of the hardness profile of high - carbon - concentration deep - carburization, on the basis of analyzing this process and taking into account the influence o f carbide solution and dissolution, carbon - concentration and temperature on the diffusion behavior, and the influence of the environment factor on carbon trans fer through the gas - solid interface
文摘:在對高濃度深層滲碳的特點進行分析的基礎上，考慮到碳化物的析出與溶解、溫度及碳濃度對擴散行為的影響，氣氛環境對相界面碳傳遞過程的影響，淬火烈度對滲碳層冷卻效果的影響，提出了一種新的模擬高濃度深層滲碳滲層硬度分佈的方法。 -
According to the characters of transformations in solids, the ma process can be divided into three stages : physical fragment izing stage, diffusion and solid solution stage, and carbide forming stage
根據相變特點將fe - cr - c三元合金的機械合金化過程分為三個階段：物理粉碎階段、擴散固溶階段和碳化物析出階段。 -
Based on the analysis of gas - solid multiphase catalytic reaction, the chemical reaction model is established. when the reaction is controlled by the chemical dynamic, the reaction rate is introduced by consideration of the adsorption and desorption effects. when the reaction is controlled by mass transfer, the diffusion coefficient is established which can present the flow rate increases in small reynolds domain ; for the internal diffusion, the internal diffusion coefficient is derived, and then the internal diffusion is coupled with chemical reaction to represent the phenomenon that the diffusion and the chemical reaction occur cocurrently
本文在考慮催化轉化器載體內發生的傳熱傳質現象的基礎上，建立了催化轉化器的一維單孔道和三維多孔道傳熱傳質模型;在分析載體內以氣-固多相催化反應為特點的工作機理的基礎上，建立了催化轉化器的化學反應模型:當催化轉化處于化學動力學控制區時，引入了考慮吸附、表面反應和脫附的表面化學反應速率公式，當催化轉化處于質量輸運控制區時，引入了決定外擴散能力的擴散系數公式和和決定內擴散速率的內擴散系數公式，並與化學反應速率相耦合，得出由擴散過程決定的化學反應速率公式。 -
After finished the cyclic voltammetry experiments, the results showed that iron steel grid can act as good current collector in the aqueous electrolyte. while the scan rate was fall in the range of 0. 5 - 4. 0mv / s, electrochemical reaction of the lithium insertion / extraction in the solid phase was kinetically limited by the diffusion of lithium ions. after 40 cycles in aqueous electrolyte the discharge capacities of sample of s13 reached 77mah / g, and showed good cycle performance
在水溶液中不銹鋼網可以作為電極的集流體，在0 . 5 - 4 . 0mv / s的掃描速度范圍內，鋰離子在尖晶石鋰錳氧化物的嵌入和脫嵌的電化學反應在動力學上是受鋰離子在固相中的擴散所控制，充放電實驗顯示樣品s13在水電解液中經過40個循環后達到77mah / g的放電容量，具有很好的循環穩定性。 -
Abstract : in the course of deeply processing of nonmetal mineral, because of the compact structure of mineral, most liquid - solid phase reactions conform to shrinking core model, including unstable diffusion with boundary - moving
文摘:在非金屬礦的深加工過程中，由於礦石結構緻密，大多數液固相反應符合縮芯模型，其中包含有邊界移動的不穩定擴散。 -
For the exist of al2o3 particles in the front of the interface between solid phase and liquid phase changing the thermal diffusion conditions, the evolution of ultimate microstructure of the composites was like as the solidification of single - phase alloy
5 .熔液溫度較低時，以單向凝固為主，熔液溫度較高時，以等軸凝固為主。最終凝固組織的演變類似單相合金的凝固組織演變。 -
A new type of structure of the solid - stale displacement reactions which named spiral - mtergrowth - aggregate structure was discovered in the mo2c - si diffusion couple and was considered as the result of spinodal - decomposition continuous phase - transformation
昆明理工大學博士學位論文2002 . 5摘要6 .初步發現了一種新的固態置換反應形貌結構:螺旋共生束集型結構。 -
In recent years, by use of the characters including high - penetration ability of ga in sio2, small diffusion stress in si, large diffusion efficiency and large solid - solubility, open - tube ga - diffusion technology in sio2 / si system was realized
近年來，巧妙地利用ga具有強穿透sio _ 2的能力，在si中具有擴散應力小、擴散系數大、固溶度較大等特點，實現了開管sio _ 2 si系下的擴散。 -
Moreover, reaction path analysis was accomplished on the fundamental base of the theoretical calculation for mojsi / t phase - interface in the diffusion couple mo2c - si at 1200c. 5. interface stability analysis of solid - state displacement reaction shows that the layered structure of solid - state displacement reaction between mo2c and si ( fig. 6. 8 ) is not stable
利用模型進行的1200 ， mo _ 2c - si擴散偶mo _ 4si _ 3 / t相界面的分析計算，為反應路徑的細致分析奠定了堅實基礎，這也是該理論模型應用於實際束集型結構分析的引人注目之處。 -
It is indicated that mechanical milling dramatically enhances the activity of the powder and thus making the solid state diffusion between the two elements much easier. on the other hand, green samples made of deep milled powders are hard to sinter to their densification
實驗結果表明，機械研磨由於顯著提高粉體活性而促進ni ， ti元素間的擴散相變，研磨程度越深，對固態反應相變的促進作用越大。 -
6. the melting of the grain boundary is the reason of the semi - solid grain globalization, and its control factors were the atomic diffusion velocity and the liquid - solid interface curvature
6 、半固態晶粒球狀化的基本原因是晶界熔化，其控制因素是因液界面處原子擴散遷移的速度和界面曲率。 -
It is found that, the sintering process of w - ni - fe - cu alloy was a typical liquid - phase process, which including particle rearrangement stage, dissolving - precipitation stage and solid - phase sintering stage. cu plays an important role in the particle rearrangement stage, while fe can promote the densification by forming ni - fe - w bonding - phase. ni can not only form the bonding - phase, but also enhance the diffusion between the w grains
研究表明， w - ni - fe - cu合金的液相燒結緻密化經歷了顆粒重排、溶解-析出和固相燒結等三個階段， cu僅在顆粒重排階段起主導作用； fe主要在溶解-析出階段通過形成ni - fe - w三元粘結相來促進w合金的燒結緻密； ni不僅參與形成ni - fe - w三元粘結相，並且在w晶界上通過與w的互擴散促進了固相w晶粒的粘合。
分享友人