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Abstract:The crystal structure of lithium cobalt system, lithium manganese system and lithium nickel system, together with the promising latent material of polymer and iron salt contained polyanions were reviewed. The characters of electrical properties were analyzed with the point of crystal structure. On this basis, the requirements in crystal structure for good positive electrode were suggested.

Abstract:鈾和鈾合金用涂層不同于通常的耐高溫涂層，不僅要求具有耐高溫和抗熱震，還要求涂層與基體和熔體之間具有化學穩(wěn)定性。分析了熔煉過程中的鈾和鈾合金的碳污染源和污染機理。表明爐內的CO和涂層的缺陷面積是熔體碳污染的主要來源，而熔體的碳污染對涂層缺陷面積更敏感，并指出了涂層的設計要求。不同涂層材料體系和制備方法的比較表明：單層涂層不能滿足高性能高質量鈾和鈾合金熔煉的要求；內層為阻擋層（碳化物或難熔金屬W，Nb，Mo等），外層為Y2O3的復合涂層，能夠滿足高溫鈾合金的熔煉要求，是鈾和鈾合金用涂層的發(fā)展趨勢。

Abstract:用硝酸鈀銨((NH4)2Pd(NO3)4)熱分解法制得了鈀含量為44.5%±0.1%(質量分數(shù),下同)的涂鈀硅藻土(Pd/K)。分別在293K,303K,313K下測定了不同氫鈀比的動力學曲線。結果表明,在常溫下Pd/K與氫分為初始快反應和后期長時間的慢反應2個階段。其中,快速反應階段的吸氫動力學曲線在1min內滿足以下關系式:P=P0+(P0–Pe)·exp(Kt),符合解離吸附機理。在α及β相區(qū)的吸氫速率常數(shù)隨氫鈀比增加而呈線性增加,而坪臺區(qū)與兩相區(qū)轉變點附近的速率常數(shù)呈減小趨勢。當氫鈀比為0.0015~0.0175時,活化能由2.82kJ·mol-1上升至10.45kJ·mol-1。

Abstract:The modified embedded atom method (MEAM) has been applied to parameters calculated for noble metals Cu, Ag Au, Ni, Pd, Pt, Rh, Ir. The parameters of those elements were obtained. The elastic constants, mono-vacancy formation energy, energy difference between face central cubic structure and body central cubic, binding energies of divacancy were calculated. The dilute solution heat of noble binary alloys were also calculated with the present MEAM model. The calculated results were compared with the available experimental data and the results of other theories, which the agreement is reasonable.

Abstract:利用XRD，DTA和DSC分析了機械合金化80．7W-13．2Ni-6．1Fe（at％，下同）合金的相變和熱穩(wěn)定性。結果表明：球磨20h和60h的粉末在加熱過程中發(fā)生不同的相變化。球磨60h粉末在退火過程中除了晶體缺陷和應力釋放等過程以外，有明顯的非晶晶化和NiW相析出過程。同時，機械合金化可以降低粉末的燒結溫度，同未球磨粉末相比，球磨20h和60h的80．7W-13．2Ni-6．1Fe合金液相出現(xiàn)的溫度均降低了200℃以上。

Abstract:研究了機械合金化制備的納米晶WC-10Co復合粉末的真空燒結特征，分析了孔隙度、顯微硬度與燒結時間和溫度的關系，考察了改性ZrO2納米粉體對燒結的作用。結果表明：在1325℃，15min的燒結條件下，樣品的相對密度達到了98.6％；顯微硬度隨著燒結時間的延長和燒結溫度的升高先增加后降低，在1325℃燒結15min條件下，合金的最大硬度為22950MPa；改性ZrO2納米粉體既有利于晶粒長大的控制，同時又有利于材料致密化的進行，可以顯著的提高燒結合金的性能。

Abstract:采用SEM和金相儀器對添加不同Y量的納米粉90W-7Ni-3Fe合金試樣斷口進行形貌觀察和W晶粒測試：并對燒結態(tài)試樣的相對密度、抗拉強度、延伸率等性能進行測定與分析。結果表明：當Y量在0．2％～0．6％（質量百分數(shù)，下同）時，試樣相對密度為99.2％～99．6％，抗拉強度為1000MPa-1100MPa，延伸率為16％-19．5％：添加0．4％Y后，W晶粒從原來的20μm～25μm減小到12μm，W晶粒形狀由不加稀土時的球形變?yōu)榻蛐位蚨噙呅?。添?．4％Y后，在界面上形成了W13．07Ni2.96Fe1.52Y23．65Ox（摩爾數(shù)比）的中間相，其阻止了W原子在粘結相中的擴散，阻止了W晶粒長大，細化了W晶粒，提高了合金的性能。

Abstract:用磁控濺射法在玻璃基片上制備了具有等原子比組成的不同厚度的CoPt薄膜及不同Ag底層厚度的CoPt／Ag薄膜。真空退火后的結果表明，膜厚對CoPt薄膜的微觀結構和磁性能有著重要的影響，膜厚較薄時（δ≤15nm）有利于易磁化軸（c軸）垂直于膜面取向，從而具有高的垂直磁各向異性；Ag底層可以誘導L10-CoPt相的形成并使c軸垂直擇優(yōu)取向，且Ag底層越厚其誘導效應越強。

Abstract:Well-dispersed Silver colloids are prepared from AgNO3 and KBH4 under the protection of polyvinylpyrrolidone (PVP) in the ultrasonic field. The main factors influencing on stability of silver colloids, such as the concentration of PVP and KBH4, ultrasonic time and power, are discussed. The silver colloids are characterized by TEM, SAED and Spectrophotometer. The result indicates that the stable silver nanoparticles are prepared with PVP/ AgNO3 mass ratio of 1:1. Selected area electron diffraction pattern reveals that the silver nanoparticle is of face-centered cubic structure. Spherical-like silver nanoparticles with about 20 nm size are synthesized with AgNO3/ KBH4 molar ratio of 1:2. The dispersion and stability of the silver colloid will be improved after ultrasonic wave treatment. The diameters of silver nanoparticles decrease and the particle size distribution becomes narrow with the ultrasonic power increase. Silver particles with 10~20 nm size and spherical shape have been prepared after 50 min of ultrasonic wave treatment.

Abstract:The effect of alloying elements on the quasi-solid mechanical properties and on the solidification behavior of alloy Al-4.5Cu have been studied in the present paper. The results indicated that Si, Ce, La, Ti and Zr elements can effectively narrow the gap of crystallization range and reduce the hot cracking tendency of Al-4.5Cu, and the addition of La can increase hot crack resistance properties of Al-4.5Cu alloy. A new type of casting Al-4.5Cu alloy has been successfully developed based on the results of the study, which has been used in some areas for its good comprehensive properties at both ambient and elevated temperatures.

Abstract:采用普通凝固技術在高鎂、低鋅和低釔合金中制備出鎂合金穩(wěn)定態(tài)準晶相，為制備準晶增強自生復合材料的可行性開辟途徑。通過光學顯微鏡、X—ray衍射、掃描和透射電鏡顯微分析技術，確定了準晶的組織、相成分及結構。分析了由于合金成分小同，特別是稀土元素Y摩爾分數(shù)的不同導致準晶的分布、數(shù)量等差異。結果表明：Mg-Zn-Y三元合金在室溫冷卻過程中，準品相直接從液相形核、長大；伴隨Y摩爾分數(shù)的增加，準晶相的晶粒度、圓整度和分布均勻化程度均有提高。

Abstract:The role of oxygen in the heat treatment process of SrTiO3 varistor ceramics has been investigated. It is found that the varistor voltage of SrTiO3 ceramics independent of the sample thickness, and it increases with the heat treatment temperatures increase, that the dielectric property is mainly governed by a highly resistive surface layer. The XPS results of Mn 2p and O 1s suggest that the surface layer was formed by oxygen diffusion and surface chemisorption at grain boundaries during the heat treatment in air. The chemisorption of oxygen in grain boundaries, which leads to the highly resistive surface layer, is the origin of the varistor behavior of SrTiO3 ceramics.

Abstract:采取溶膠凝膠法在活性炭表面原位合成RuO2·xH2O,經150℃熱處理后制成的碳釕復合材料首次應用于堿性電化學電容器中。經電化學測試表明,碳釕電極在堿液中具有良好的容量性質和高功率放電特性,當電流密度為1.0A/g,釕含量為15%(質量分數(shù),下同)的復合材料作為堿性電容的正極,其單電極比容量可達274F/g,是空白活性炭材料的1.22倍,并可較好地抑制電容自放電;該復合材料作為堿性電容的負極,相同電流條件下雖然也具有較高的單電極比容量(278F/g),但電容的自放電現(xiàn)象較為嚴重。

Abstract:研究了用放電等離子燒結技術將WO3和炭黑的混合粉快速原位合成為致密的超細WC塊體過程中試樣的物相、密度和顯微組織的變化，分析了合成過程。結果表明：隨著合成溫度的升高，碳能快速地將WO3還原成WO2.72，WO2及W，接著發(fā)生碳化反應，生成W2C，WC，合成的各階段相互重疊；當合成溫度低于1118℃時，試樣的物相發(fā)生變化，密度變化不顯著，溫度繼續(xù)升高試樣發(fā)生燒結，且剩余的微量雜相W2C消失，得到致密的WC塊體；在合成過程中，試樣的顯微組織因物相不同而有很大不同，WO3，WO2，W，W2C和WC均呈顆粒狀，WO2．72呈棒狀，隨著溫度升高，顆粒由0．2μm長大到0．5μm；WO3還原的前期放出CO2氣體，后期放出CO氣體，還原反應不經過WO2.9這一中間氧化物階段。

Abstract:The SnO2:Sb films was prepared on glass substrates by rf magnetron sputtering method. The effect of different doping content and annealing on structure of the thin films were investigated. Result show that the prepared samples are polycrystalline thin films with rutile structure of pure SnO2 and have orientation of (110) direction. The crystallization of the samples changes with the different doping content and annealing conditions. The photoluminescence of the samples was measured at room temperature. For the first time, a UV-violet luminescence peak near 392 nm was observed, and the luminescence mechanism was also tentatively investigated.

Abstract:用工業(yè)型脈沖直流等離子體增強化學氣相沉積技術，在高速鋼（W18Cr4V）表面沉積了Ti-Si-N復合薄膜，研究了Ti-Si-N復合薄膜的微觀組織和力學性能。結果顯示，薄膜相結構為納米晶TiN和納米晶或非晶TiSi2以及非晶相Si3N4。在Si含量為5．0at％-28．0at％范圍內，薄膜的晶粒尺寸逐漸變大；Ti-Si-N薄膜的顯微硬度相對于TiN有明顯增加，最高硬度可達40GPa：高溫退火后，Ti-Si-N納米復合薄膜的顯微硬度與晶粒尺寸在800℃高溫下仍然保持穩(wěn)定。

Abstract:A sort of new-style dieless drawing process titanium pipe shaped and the method of manufacture technology were introduced. The law of drawing speed was analyzed according to the deformation mechanism of titanium pipe dieless drawing. The mathematical model ofdieless drawing for titanium pipe has been set up, using calculus theory and titanium pipe geometry figure during dieless drawing and so on. It has been proved to true that the mathematical model is very simple, accurate, reliable, and practical through of experiment.

Abstract:以陰陽離子復合摻雜為基礎，采用超聲共沉淀法、Pechini法和高溫固相法合成尖晶石型摻雜錳酸鋰前驅體，使用3段熱處理方式，即650℃預燒、780℃燒結、550℃回火制備得到摻雜尖晶石LiCo0．05Ni0．05Mn1.9O3．9F0.1。通過化學容量分析測定Mn含量和平均價態(tài)，用粒度分布、電鏡掃描（SEM）、X射線衍射（XRD）、電化學性能測試對產物進行表征。結果表明產物的Mn含量和平均價態(tài)與理論值吻合。3種合成方法相比，超聲共沉淀法產物的粒徑最窄，比表面積最?。?4919cm^2／cm^3），晶型完整，衍射強度最大，結晶性能最佳，晶格常數(shù)為0．821nm，晶粒尺寸為57．48nm：經裝配電池電化學性能測定，超聲共沉淀法產物的比容量更高，循環(huán)性能更穩(wěn)定，經30次循環(huán)后容量衰減僅7．2％。

Abstract:The present work was to determine the optimum sintering system and properties of the nanometer tetragonal polyerystallihe zirconia green body by the aqueous gel tape casting process. The results show that the microstrueture of the green body is even, the calcining process is accomplished with organic burning out, the separated preheating procedure is diminished. Therefore, the efficiency was remarkably improving and the resources was saved. On the basis of DTA-TG analysis, the proper calcining system was obtained. The green body ofzirconia turned into the high performance films, consisting oftetragonal polycry, stalline zirconia after sintering for 6 h at the temperature of 1773 K.

Abstract:利用彎曲應力松弛方法研究了魏氏組織Ti-6Al-4V合金200℃．400℃和600℃時的應力松弛行為，并利用TEM研究了應力松弛前后微觀組織變化：宏觀熱力學參數(shù)結合微觀組織觀察初步探討應力松弛機理。研究表明：應力松弛開始時應力下降較快．隨時間延長．應力下降速率降低．最后趨于應力松弛極限。TEM微觀組織觀察結果結合表現(xiàn)應力指數(shù)分析表明：200℃和400℃應力松弛變形機制為位錯蠕變，a型位錯滑移：而600℃變形機制則為回復蠕變和原子擴散的共同作用機制．a型和a＋c型或c型均開動．產生滑移和攀移。

Abstract:研究了熱處理對超輕Mg-10．02Li-3．86Zn-2．54Al-1．76Cu合金力學性能的影響。研究表明，隨淬火溫度升高（150℃～350℃），Mg及Al在口相中固溶程度增加，合金淬火硬度增加；350℃，1h淬火后的時效過程中未發(fā)現(xiàn)時效硬化現(xiàn)象，而α相及AlLi相從β相中析出將導致合金軟化，且時效溫度越高，軟化速度越快。同時，淬火溫度升高至250℃，固溶程度增加導致合金強度增加；淬火溫度進一步提高至350℃，一方面由于晶粒長大，另一方面可能淬火后Mg在β相中過飽和度增加，α相易沿β晶界連續(xù)析出，導致合金強度及塑性大幅度下降。

Abstract:采用電化學線性極化、交流阻抗譜技術研究了不同基片偏壓上陰極電弧沉積TiN/Ti鍍層在50×10-6g/gCl-溶液中的腐蝕行為,并對鍍層腐蝕的機理進行了探討。結果表明:基片偏壓–400V時,鍍層耐蝕性能好;鍍層表面的針孔是誘發(fā)鍍層和基材體系發(fā)生點蝕、電偶腐蝕的主要缺陷。

Abstract:用脈沖直流等離子體增強化學氣相沉積（PCVD）方法在高速鋼（HSS）基體上制備了Ti—Si-N薄膜，重點從不同溫度退火后薄膜相結構、晶粒尺寸和顯微硬度的變化等方面，探討了不同Si含量的Ti-Si-N薄膜的高溫熱穩(wěn)定性。結果表明：Ti-Si-N薄膜在900℃以內退火處理后，晶粒尺寸和顯微硬度并無明顯突變，尤其是Si含量較低時，在800℃，晶粒尺寸和顯微硬度幾乎沒有變化，表明Ti-Si-N薄膜具有非常良好的高溫熱穩(wěn)定性，這可能與薄膜相形成在高溫下仍為調幅分解有關。

Abstract:通過對Au—Ag—Cu—Pt高含金量齒科鑄造合金的研究，分析此合金的時效硬化行為，為其臨床實際應用提供理論基礎。試樣經800℃，30min固溶處理后在350℃，500℃進行等溫時效，通過金相組織觀察、顯微硬度測試、X射線衍射（XRD）和掃描電子顯微（SEM）分析，研究了此齒科合金時效后的顯微結構與性能。結果表明，該合金是典型的時效硬化型合金。長時間時效使面心立方基體α0相發(fā)生分解，最終轉變?yōu)槊嫘牧⒎礁汇yα2無序相和富Cu的面心正方AuCuⅠ有序相。兩相以片狀存在。晶界周圍的片層厚，晶內的片層很薄，兩者的分解方式不同。350℃短時間時效析出的AuCuⅠ有序相與基體保持共格，使基體中產生應力場，有效地提高了合金的硬度。

Abstract:利用化學共沉淀、高能球磨技術及熱壓燒結等方法制備出納米摻雜Ag（SnFe）O2觸頭合金，通過X射線衍射（XRD）、透射電鏡（TEM）和冷場發(fā)射掃描電鏡（FESEM）等對合金觸頭及其燃弧性能進行了分析。結果發(fā)現(xiàn)：Fe元素的加入，使Sn02納米顆粒在550℃以下焙燒制粉和750℃以下塊體燒結成型時都未明顯長大，保持在20nm左右，制備的觸頭合金呈現(xiàn)納米第二相彌散均勻分布在Ag基體中。在模擬電弧侵蝕試驗中，該合金電弧陰極斑點鋪展在較大區(qū)域，形成多點燃弧形貌，有效降低燃弧時間和電弧電流，分散電弧能量，使陰極斑點沒有明顯的液體噴濺、Ag的蒸發(fā)和第二相的分解，同時非晶的納米第二相與Ag的潤濕性更好，可進一步增加熔體粘度，提高耐電弧侵蝕性能。

Abstract:在C／C復合材料表面采用熔漿法制備Mo—Si系涂層的燒結過程中通入氮氣，開發(fā)了Si3N4．MoSi2／Si—SiC（Mo-Si-N系）多層抗氧化涂層，并初步考察了涂層的抗氧化性能。結果表明，多層涂層的致密性主要受制于起始氮化溫度。只有在Si熔點以上通入氮氣，才能獲得致密無缺陷的涂層。多層涂層的底層為SiC，外層為Si3N4，中間層為MoSi2／Si。這種多層涂層的抗氧化性能與涂層中MoSi2的含量有關；MoSi2含量為30％（體積分數(shù)，下同）和40％時，與真空中合成的Mo-Si涂層相比，高溫抗氧化性能顯著改善，抗氧化溫度提高到1400℃～1450℃。

Abstract:采用水熱電化學法成功制備了HA/ZrO2復合涂層,對涂層的組分結構、表面形貌、熱穩(wěn)定性進行了研究,并探討了ZrO2的復合對涂層結合強度和生物活性的影響.結果表明當溫度小于200℃時,得到缺鈣磷灰石Ca10-x(HPO4)x(PO4)6-x(OH)2-x(calcium deficient hydroxyapatite,簡稱CDHA,0≤x≤1)和ZrO2的復合涂層,溫度在200℃時,得到HA/ZrO2復合涂層;經焙燒處理后,涂層中四方晶相ZrO2(t-ZrO2)與單斜晶相ZrO2(m-ZrO2)之間發(fā)生馬氏體相變;800℃焙燒后,HA部分分解為β-Ca3(PO4)2(β-TCP);當涂層中ZrO2小于35.22%(質量分數(shù),下同)時,HA/ZrO2復合涂層的結合強度明顯高于純HA涂層;復合涂層在模擬體液中浸泡7 d后,表面即形成一層碳磷灰石層,ZrO2的復合沒有降低涂層的生物活性.

Abstract:采用CoCrPtNb四元合金作磁記錄介質，并采用多層膜結構（CoCrPt）100-Nbx/CrTi／C／Glass制備玻璃盤基硬盤。實驗結果表明：采用適宜厚度的籽晶層與合適組分的底層和磁性層的多層膜結構，即使在室溫下濺射，此種薄膜磁記錄介質也可得到高達260kA／m的矯頑力；在550℃高溫下，經過30min真空退火后，其矯頑力有較大幅度提高，并在Nb含量為2．4％（原子分數(shù)）時達到極大值386kA／m，適用于高密度磁記錄。同時，也詳細分析了磁性層和底層組分、籽晶層厚度以及真空退火對磁記錄介質磁性能和微結構的影響。

Abstract:The erosion of tungsten electrode in GTA (Tungsten-inert-Gas Arc) welding under the protection of argon with a little of oxygen contamination have been investigated. Results show that the erosion of tungsten increases greatly if a little of oxygen is add in argon gas because tungsten on the surface of electrode reacts with oxygen to form tungsten oxide. Melting and evaporation of thoria were the major reasons for the erosion of thoria in electrode. To ensure the purity grade and flow rate of shielding inert gas, to use tungsten electrode activated with nanosized thoria are two better ways to decrease the erosion rate of electrode.

Abstract:Platinum was deposited onto molybdenum grid by ion beam assisted deposition (IBAD). Electron emission behavior from molybdenum grids with and without Platinum contaminated by active electron emission substances (Ba, BaO) of the cathode were measured using analogous diode method. The characteristics on molybdenum grid coated with platinum film were analyzed by X-ray diffraction (XRD), energy dispersive X-ray (EDX) and X-ray photoelectron spectroscopy (XPS). The results show that the electron emission from the grid coated with platinum film is less than that without Platinum film, and the mechanism for suppression of the electron emission of molybdenum grid coated with Platinum film was discussed.

Abstract:La0.5Sr0.5MnO3 nano crystalline was synthesized by sol-gel auto-combustion method using citric acid as the chelating agents. Some analysis methods, which consisted of FT-IR, XRD, DSC-TG, wave-guide, were used to character the gel and the products after calcining. It was shown that metal ions and carboxyl were coordinated by the orientated manner. The phenomenon of melt, combustion and forming crystal for gel were observed in the process of thermo-decomposition, the nano crystalline had a dielectric loss in the frequency range of measurement. With the increasing of thickness, the reflectivity of perovskite-type nano crystalline increased and absorption peak shifted from high frequency to low frequency.

Abstract:采用TiB2-Al2O3-Al還原體系，通過燃燒還原技術制備了TiB2-Al2O3陶瓷復合粉體。利用XRD，XPS和SEM技術對合成粉體的相組成、化學組成及宏觀組織結構進行了分析。復合粉的顯微結構由TEM和HREM進行表征。結果表明，用燃燒合成法在420℃～700℃之間可制得TiB2-Al2O3陶瓷復合粉體。該粉體僅由TiB2和Al2O3兩相組成，顆粒分布較均勻。由于TiB2與Al2O3間形成了結合良好的界面，顆粒間彼此能有效地抑制晶粒長大，從而使TlB2-Al2O3陶瓷復合粉的粒徑減小，顆粒平均粒度在3μm～5μm之間。

Abstract:The mechanical properties of molybdenum with 3wt% niobium single crystal materials (Mo-3Nb single crystal material) were tested by miniature disk testing method. It is found that the yield stress, the fracture strength and the micro-hardness of Mo-3Nb single crystal materials by Russian supplying were higher than those of the home-made ones, while the elongations of the former material were lower than the later material. However, according to the TEM morphologies, Nb component in Russian supplying materials was a little more than that in the home-made single crystal materials, and some bar-type strengthening phases were observed in Russian supplying materials. Therefore, the difference of the microstructures and the component may cause the mechanical properties difference of the two materials.

Abstract:合成了N-正丁基異辛酰胺(BiOA),并對其從鹽酸介質中萃取Pt(IV)進行了研究。結果表明:待萃液Pt(IV)濃度為1.000g·L-1,HCl濃度為5mol·L-1時,用2.0mol·L-1N-正丁基異辛酰胺-5%TBP-正辛烷按相比(O/A)1:1混合萃取Pt(IV),經過5min的萃取振蕩,萃取率可達99.5%。此萃取體系中TBP對Pt(IV)無協(xié)萃效應;水是載Pt(IV)有機相的有效反萃劑,反萃率可以達到90.3%。N-正丁基異辛酰胺萃取Pt(IV)的反應是放熱反應,反應熱為–10.52kJ·mol-1。紅外光譜分析表明,在1mol·L-1~5mol·L-1的HCl范圍內,N-正丁基異辛酰胺萃取鉑的反應為酸性離子締合萃取。萃取反應為:PtCl62-+2BiOA(0)+2H+→[(BiOAH+)2·PtCl62-](0)。

Abstract:利用微弧氧化技術，通過增加涂層致密性的方法及選擇合適的放電電壓，在鈦合金表面制備出致密的、與基體結合優(yōu)良的微弧氧化膜。微弧氧化膜分為3層：過渡層、致密層和疏松層。XRD分析表明，微弧氧化膜主要由Al2TiO5和Al2SiO5組成。在700℃循環(huán)氧化100h后，經微弧氧化處理的鈦合金的氧化增重量為2．08mg／cm^2，低于未經微弧氧化處理的鈦合金的增重量（20mg／cm^2），因而微弧氧化能有效地提高鈦合金的抗高溫氧化性能。

Abstract:采用浸漬還原法(I-R法)在Nafion離子膜上鍍覆納米Ag,并就AgNO3濃度對SPE電極鍍覆納米銀的影響作了研究.研究表明采用I-R法可制得細致Ag鍍層,有效增加Ag的分散度及電極的真實面積.在還原劑濃度為0.1mol·L-1,浸漬還原溫度均為50℃及浸漬還原時間分別為40 min,60 min的條件下,調節(jié)浸漬液AgNO3濃度至3.5 mmol·L-1時,可獲得致密、均勻的納米級Ag/SPE電極.同時驗證砂紙糙化的預處理有利于增加Ag的負載和附著力,有利于提高Ag催化層的有效面積.

Abstract:對在納米壓入儀上進行懸臂梁法測量彈性模量的主要影響因素進行了綜合分析,主要包括加載系統(tǒng)懸置彈簧剛度、壓頭壓入、梁沿截面寬度方向撓曲、梁支座附加撓曲等影響。在考慮這些因素的基礎上,得到了懸臂梁的有效撓度,利用有效撓度與載荷之間的關系,評價懸臂梁材料的彈性模量。對單晶硅(100)懸臂梁試樣進行了實驗,得到其彈性模量為155GPa±9.5%GPa,與參考文獻值符合較好。表明在納米壓入儀上進行懸臂梁法測量,只有綜合這些影響因素后,才能獲得有效、準確的彈性模量測量結果。

Abstract:在1.0 mol·L-1～2.0 mol·L-1的H2SO4介質中,Ce(Ⅳ)與DBC-偶氮氯膦反應產生褪色反應,測定鈰表觀摩爾吸光系數(shù)為ε530nm=4.89×104L·mol-1·crm-1,Ce(IV)濃度范圍在0.020μg·mL-1～0.88μg·mL-1范圍內遵守比耳定律.考察了24種共存離子對測定鈰的影響.本方法已滿意地用于測定分子篩中的鈰.