precipitation reaction 中文意思是什麼

precipitation reaction 解釋
沉澱反應
  • precipitation : n. 1. 猛然摔下，落下。2. 猛沖；急躁，輕率，魯莽。3. 【化學】沉澱（作用）；降雨（量）；（雨、雪等的）降落。
  • reaction : n 1 反作用，反應；反沖；反動力。2 【政治學】反動，倒退；復古（運動）。3 【化學】反應，【物理學】...
  1. Fe3o4 nano - particles, which can be dispersed in nano scale, were prepared by means of chemical co - precipitation method. such influencing factors as the type of precipitant, the feeding mode, the surfactants, the reaction temperature, the curing temperature were surveyed. some properties such as crystal structure, particle size, magnetic properties and iron content were characterized

    深入探討了沉澱劑的種類、加入方式、表面活性劑、反應溫度、熟化溫度等各種因素對產物的粒徑及磁性能的影響，對fe _ 3o _ 4納米粒子進行了晶體結構、粒徑、磁性能、鐵含量等性能的表徵。
  2. The paper discusses dynamical conditions of the supercritical ore - forming fluid system based on study of regional geological background and analyses of physiochemical conditions of ore - forming process and puts forth the ore - forming mechanism : upper mantle uplift - mingling of meteoric water and magmatic hydrothermal fluid separated from acidic magma under tensile or transitional tensile environment - water / rock reaction - transportation - chemical coupling ore precipitation

    在分析超臨界成礦流體系統形成的區域地質背景和研究成礦物理化學條件的基礎上，探討了超臨界成礦流體系統形成的動力學條件，提出該系統的成礦機理：與燕山晚期酸性火山侵入巖漿有關的金銅礦床是在上地慢隆起、張性或向張性過渡背景下形成的，酸性巖漿經熔體流體分離作用形成的巖漿熱液與大氣降水混合，經水巖作用等復雜的輸運和化學反應耦合過程的動力學產物。
  3. Caculation is carried through adopting mechanism function of the first order reaction, f1 : f ( ) = l -. the results have good linear relativities, a, the precipitated fractions are excellently representative, and f1 is ascertained the most probably mechanism function of " phase precipitation. the electric field reduces activation energies of " phase precipitation and average sizes of " particles both in 2090 and 1420 alloys

    採用一級反應的模型函數f1 ： f （ ） = 1 - ，計算了相析出的動力學，計算結果具有良好的線性相關性，並且具有很好的代表性，確定f1為相析出的最概然機理函數；電場固溶使2090合金和1420合金升溫時效過程的相析出激活能有一定程度的減小，並減小了相顆粒的平均尺寸。
  4. The kinetics of homogeneous precipitation was studied, the activation energy was about 100. 19kj / mol, and reaction index was 1. 42

    經穩定態假設處理后，得到沉澱反應的表觀活化能為100 . 19kj mol ，硝酸鈷的反應級數為1 . 42 。
  5. The results of the study on the processes of precipitation and the followed calcination indicated that the shape and size of the precursor influenced the product obviously. the precursors with shapes of bar or lamellar were obtained by controlling the reaction conditions, and accordingly, the product of nano - zno with different shape and size could be obtained

    對該法的沉澱反應和焙燒反應進行了研究，通過控制沉澱反應的工藝參數，可以得到不同尺寸的條狀和片狀前驅物，並對其進行了研究和分析；再經過對焙燒反應參數的調控，可以得到不同形態和尺寸的納米級氧化鋅，如球狀、網狀和棒狀。
  6. In this paper, co3o4 nano - particles were prepared by homogeneous precipitation method, technical conditions and kinetics were studied, the main contents and results are as follows : co ( no3 ) 2 6h2o was used as raw materials, and co ( nh2 ) 2 was used as precipitator, co3o4 nano - particles were prepared by homogeneous precipitation. the influences of concentration, molar ratio of reactants, reaction temperature and time, dryness temperature and time, and calcining temperature and time on particle size were investigated

    本文採用均勻沉澱法制備納米co _ 3o _ 4粉體材料，研究了制備工藝條件、沉澱反應和前驅體熱分解過程的動力學，主要研究內容及結果如下：以硝酸鈷為原料，尿素為沉澱劑，採用均勻沉澱法制備納米co _ 3o _ 4 ，考察了硝酸鈷濃度、反應物摩爾比、反應溫度和時間、乾燥溫度和時間、煅燒溫度和時間等條件對產物粒徑的影響。
  7. In order to obtain the mn - zn ferrite precursor particle which has itra - fme property, the optimum technological condition was obtained through the orthogonal experiments in this paper. in the co - precipitation procession of preparation the leading factors that affect the size of the particle are ratio of the ion concentration ( a ), ph of the reaction ( b ), temperature of reaction ( c ), and aging time ( d )

    本文通過拉丁正交試驗，以粒徑尺寸為考察目標，將離子濃度比（ a ） ，反應ph值（ b ） ，水浴溫度（ c ）和陳化時間（ d ）作為四參量，利用每一參量為變量進行試驗確定各參量值，從而確定製備超細錳鋅鐵氧體前驅體粉末的條件。
  8. Through the competition of ionization equilibrium of zno22 - and precipitation reaction, the nucleation and growth process of znse have been adjusted, and monodispersed znse semiconductor hollow microspheres are obtained. these microspheres were found to form through aggregation of small znse nanocrystals sizes of which could be finely tuned by temperature control. a novel gas - liquid interface aggregation mechanism was proposed and this idea might be generalized in other systems

    以zno22 -陰離子提供鋅源，利用它在強堿性溶液中緩慢釋放出zn2 + ，並與se2 -之間的電荷排斥作用，成功地調節了反應動力學，獲得了尺寸和分散性都非常均勻的微米級znse空心球，並實現了空心球內部粒子尺寸的調控，提出了新穎的氣液界面團聚機理。
  9. This paper has reviewed the resources of ceo2 in our country, the markets and the condition of application. the advantages and drawbacks of the important preparation methods were reviewed. it puts emphasis on the reaction mechanism of precipitation method to nanoparticals and analyzes redox potential between ce3 + and ce4 +, puts forward a new technics named " a two - stage precipitation process " to succeed in obtaining nanocrystalline powers of cerium oxide

    本文簡要介紹了我國ceo _ 2的資源和市場以及國內外納米ceo _ 2的應用現狀：分析對比了納米ceo _ 2制備研究現狀；重點討論了沉澱法制備納米粉體的理論基礎：結合鈰（ ）離子、鈰（ ）離子的氧化?還原電位分析，提出以兩步沉澱法來制備納米二氧化鈰。
  10. Abstract : the equilibrium constant of carbonization reaction of lime white was calculated using three thermodynamics methods. the results indicate that the carbonization reaction of lim white was the neutralization reaction between acid and alkali first, and it was the transform reaction of precipitation second. the essential cognition of the carbonization reaction of lime white was deepend. it was of guiding significance for industrial production of light ( precipitation ) calcium carbonate

    文摘:用3種熱力學方法計算了石灰乳碳化反應的平衡常數，結果表明，石灰乳的碳化反應首先是酸堿的中和反應，其次才是沉澱的轉化反應，從而加深了對石灰乳碳化反應本質的認識，對輕質（沉澱）碳酸鈣的工業生產有指導意義
  11. As the fact that nanoparticles from orginal reaction solution have much wider size distribution with deviation larger than 15 %. size - selective precipitation was applied to sharpen the size distribution of those nanoparticles. a size series of qds with improved monodispersity can be achieved just from one sampling solution

    3 .由於生長原液中納米粒徑分佈的單分散度較差的現象，採用合成后尺寸選擇性沉澱工藝對納米顆粒尺寸分佈進行銳化，能夠從一個樣品中選出尺寸大小分佈，單分散性明顯改善的納米量子點。
  12. In this paper, the preparing technological parameters, formation mechanism and structures of ( lithium ) vanadium oxides ( nanocrystalline vo2, amorphous v2o5, layered li1 + xv3o8 and inverse spinel linivo4 ) are systematically studied and discussed, and some properties of the products are measured as cathode materials for lithium ion batteries. the main results are as follows : ( 1 ) nanocrystalline vo2 has been successfully synthesized by a solution chemical reaction method in normal temperature and pressure. the procedure involves v2o5 reacts with koh to form k3vo3 in water and then k3vo3 is reduced with kbh4 around ph = 4 forming vo2 precipitation in aqueous

    本文從實驗與理論分析相結合的角度對（鋰）釩氧化物（納米vo _ 2 、非晶態v _ 2o _ 5 、層狀li _ （ 1 + x ） v _ 3o _ 8及反尖晶石型linivo _ 4 ）制備過程中工藝參數、結構和形成機理等方面進行了系統深入的研究，對（鋰）釩氧化物電性能進行了初步測試，取得的主要結果如下： （ 1 ）成功的在常溫常壓下通過溶液化學反應直接制得具有納米結構的vo _ 2粉。
  13. The powder synthesized by co - precipitation has many advantages such as fine crystal grains, good homogeneity and purity, high activity, and these favor the solid phase reaction. so the magnetic properties of the samples were better than that of those prepared by conventional oxides methods

    共沉澱法制備的粉料具有晶粒細小，均勻性好，活性高，純度高等特點，這些特點有利於固相反應，能夠得到性能優良的鐵氧體材料。
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