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zr
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  zr-4
     Electrochemic Extracting of the Second Phase Zr (Fe,Cr)_2 from Zr-4 Alloy
     Zr-4合金中第二相Zr(Fe,Cr)_2的电化学分离
短句来源
     A sort of electrolyte, CH3CH2OH: HCIO4:CH3(CH2)2CH2OH=25: 3: 2 in volume,is found for extracting the second phase particles Zr(Fe, Cr)2 from Zr-4 alloy electrochemicaLly, for which the anodic polarizing behaviors of both Zr-4 and Zr(Fe, Cr)2 alloy are examined, and the anodic products are analysized by TEM and X-rays diffraction.
     通过测定Zr-4合金和Zr(Fe,Cr)2:合金在各种电解液中的阳极极化行为,和对阳极产物的电子显微镜和X射线衍射分析,得到了一种适合分离Zr-4合金中第二相Zr(Fe,Cr)2的电解液:乙醇:正丁醇:高氯酸=25:3:2;
短句来源
     Texture Hardening of Zr-4 Plate
     Zr-4板材的织构强化
短句来源
     The results show that, the deformation during cold rolling reaches 65%, after annealing at 540℃ for 2 hours the strengthening effect of the texture of Zr-4 alloy plates can be remarkably increased.
     结果表明,冷轧变形65%,经540℃/2h退火,可以显著提高Zr-4合金板的织构强化效果。
短句来源
     The annealing texture of Zr-4 alloy cold rolling plate is studied with the crystal orientation distribution function (ODF).
     用晶体取向分布函数(ODF)研究了Zr-4合金冷轧板的退火织构。
短句来源
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  zircaloy-4
     When exposured in steam at 400℃, 10.3 MPa for 168 days, the weight gain of 8 #alloy is about 80% of that of zircaloy-4. After 8 #alloy was exposed for 200 hours at 500℃,the nodules have never been observed on the surface of the alloy.
     在400℃、10.3MPa水蒸汽中腐蚀168天时,8#合金的增重为Zr-4合金的80%左右。 500℃腐蚀200h后,8#合金仍未出现疖状腐蚀。
短句来源
     The corrosion resistance at 500℃, 10. 3MPa steam has been investigated for the zircaloy-4 tubing with different surfaceconditions.
     对不同表面状态的Zr-4管材在500℃,10.3MPa下的过热蒸汽中进行了腐蚀试验。
短句来源
     NEUTRON IRRADIATION GROWTH OF ZIRCALOY-4
     Zr-4合金的中子辐照生长
短句来源
     Electron Microscopy Investigation of Oxide Films (<100 nm) Formed on Zircaloy-4
     Zr-4合金氧化膜(<100nm)的电镜研究
短句来源
     Neutron irradiation growth experiments are carried out on Zircaloy-4 in the HWR Reactor atCIAE. Growh specimens are irradiated in aluminium alloy capsule with argon- filled at tempera-ture 610K. The speciments have reached neutron fluence up to 4.2×10 ̄(24)m ̄(-2)(E>1.0 MeV).
     对由两厂分别生产的Zr-4包壳管样品在重水堆内进行中子辐照试验,辐照温度为610K,快中子注量为4.2×10 ̄(24)m ̄(-2)(E>1.0MeV)。
短句来源
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  “zr-4”译为未确定词的双语例句
     There is apower law relationship:G=A(φt) ̄n or a linear relationship:G=B+C(φt),between thegrowth strain(G)and fast neutron fluence. Where A,B,and C are constants.
     两厂生产的Zr-4包壳管的生长应变可用G=A(φt) ̄n或G=B+C(φt)表达式描述,两者的差异可能是合金元素和杂质的综合影响所致。
短句来源
     The Effect of Laser Surface Treatment on the Nodular corrosion of Zircaloy-4
     激光表面处理对Zr-4合金板材疖状腐蚀的影响
短句来源
     The secondary phase particles Zr(Fe,Cr) 2 embaded in the formed oxide scale on the surface of an oxidized zircaloy 4 were characterized by means of TEM and HREM. The Zircaloy 4 has been oxidized in superheated steam vapour at 10.3 MPa at 400℃ for 14 days forming an oxide scale of thickness around 1.9 μm.
     应用透射电子显微镜(TEM)和高分辨电子显微镜(HREM)研究了在400℃,10.3MPa过热蒸汽中形成Zr-4合金氧化膜中的Zr(Fe,Cr)2第二相粒子。
短句来源
     Several hypotheses on the corrosion transition phenomenon of zircaloy are presented. Among those, the phase transformation mechanism suggests that the oxide growth rate of zircaloy is mainly controlled by the transformation from t-ZrO2 to ZrO2 near the oxide/metal interface, and the t-m transfomation is enhanced due to stress relaxation in 400℃, 10. 3 MPa superheated steam or triggered by the interaction of OH- with oxygen vacanices in 300℃ aqueous lithium hydroxide solution.
     关于 Zr-2和 Zr-4合金的转折机理有多种假说,其中相变假说认为:锆合金的氧化速度主要受氧化物/金属界面附近 t-ZrO2向 m-ZrO2转变的控制。 在 400℃, 10.3 MPa过热蒸汽中,相变是由应力松驰引起的;
短句来源
     According to the analysis of Mechanical properties and corrosiveness Microstrcture by different welding experiments and heat treatment The welding process is obtained suitable for hafnium plate zircaloy 4 hlate used as controlling assembly in nuclear reactor
     通过不同焊接工艺和热处理试验及对焊接件的力学性能、腐蚀性能断口组织研究得出适用于控制燃料组件中Hf板-Zr-4板的焊接工艺。
短句来源
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  zr
Lead zirconium titanate (PZT) films (Zr/Ti=45:55) with a high dielectric constant are prepared successfully on the low-resistance Si substrate in sol-gel dip-coating process with PT film used as the buffer layer.
      
The solid acids were prepared by mounting H2SO4 on TiO2 · nH2O and Zr(OH)4, respectively, followed by calcining at 823K.
      
To deal with this contradictory situation, insolvable zirconium tricarboxybutylphosphonate (Zr(PBTC)) powder was employed to make a composite with SPEEK polymer in an attempt to improve temperature tolerance of the membranes.
      
SPEEK/Zr(PBTC) composite membranes were obtained by casting a homogeneous mixture of Zr(PBTC) and SPEEK in N,N-dimethylacetamide on a glass plate and then evaporating the solvent at 60°C.
      
Results showed significant improvement not only in temperature tolerance, but also in methanol resistance of the SPEEK/Zr(PBTC) composite membranes.
      
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Ortho nitrobenzene sulfinic acid precipitates zirconium quantitatively from hydrochloric acid solutions not stronger than 0.6N. Sixty ml of a warm 2% solution of the reagent is slowly added to 40 ml of the zirconium solution containing 40 millimoles of hydrochloric acid heated to about 70℃. After keeping at 60-70℃ for one half hour and cooling, the precipitate is filtered out and washed with 0.1 N hydrochloric acid. It has the composition of Zr (C6H4NO2SO2)2 after drying at 110-120℃ for two hours. The...

Ortho nitrobenzene sulfinic acid precipitates zirconium quantitatively from hydrochloric acid solutions not stronger than 0.6N. Sixty ml of a warm 2% solution of the reagent is slowly added to 40 ml of the zirconium solution containing 40 millimoles of hydrochloric acid heated to about 70℃. After keeping at 60-70℃ for one half hour and cooling, the precipitate is filtered out and washed with 0.1 N hydrochloric acid. It has the composition of Zr (C6H4NO2SO2)2 after drying at 110-120℃ for two hours. The precipitate can be weighed as such or as zirconium oxide after ignition.O-nitrobenzene sulfinic acid surpasses its mother compound benzene sulfinic acid in reaction selectivity. Under the conditions mentioned above, quadrivalent titanium and tin which form precipitates with benzene sulfinic acid, are not precipitated by the orth nitro compound. The increase in selectivity apparently attributed to steric effect; the corresponding para nitro derivative behaves like benzene sulfinic acid itself. Small amounts of titanium and tin do not interfere the determination of zirconium, but they coprecipitate with the zirconium compound when present in appreciable amounts; in such cases double precipitation is necessary. Good results are obtained for the direct determination of zirconium in the presence of ferric, uranyl, aluminum, cerous and manganous ions. Thorium is the only metallic element studied that is also precipitated by the reagent and seriously interferes the determination of zirconium. Satisfactory results can be obtained after precipitation of thorium with oxalic acid and oxidizing the excess of the latter with potassium permanganate. Sulfate, oxalate, tartrate, citrate, fluoride and large amounts of acetate hinder the complete precipitation of zirconium.

1.邻-硝基苯亚磺酸在0.4N盐酸溶液中与锆离子生成淡黄色絮状沉淀。沉淀不溶于水或0.1N的盐酸,具有恒定的组成ZrO(C_6H_4NO_2SO_2)_2。在110—120℃烘干后可直接 称重,也可以灼烧成ZrO_2后称重。 2.在实验条件下,除锆外只有钍离子与试剂生成沉淀,四价钛、锡离子含量低(<5毫克)时不干扰,含量大时有共沉淀现象。 3.有钍存在时,可以先用草酸分离钍,用高锰酸钾破坏滤液中的草酸,再用邻-硝基苯亚磺酸测定锆。 4.与苯亚磺酸一样,Fe~(+3)、Ce~(+3)、Mn~(+2)、UO_2~(+2)、Al_(+3)等存在无干扰。 5.邻-硝基苯亚磺酸的分析性能比苯亚磺酸好,邻位硝基的存在起了决定性的作用。

Monazite sand is digested with H_2SO_4. The acid extract is successfully treated by sodium pyrophosphate process and sodium fluoride process, when the acidity of the solution during the fluoride precipitation of thorium is above 2N. Thorium fluoride, spectral free from Ti, Zr, Hf, Fe, P and rare earth metals, can be obtained. Ce is also detected by chemical method and the result is negative. The recorery of thorium is about 95%.

将硫酸分解独居石的提取液连续用焦磷酸钠法与氟化钠法处理。当用氟化纳沉淀钍时,溶液的酸度在2N以上,可制得钛,锆,铪,铁,磷及希土元素光谱纯的氟化钍,钍的回收率约95%。

~~Ln_2O_3+2ZrO_2, Ln—Ce Pr_2Zr_2O_7 Pr_2O_3-ZrO_2.Pr_2Zr_2O_7 Fd3m-O_h~7 Z=8. Ce_2Zr_O_7.

本文借助于综合热分析及X-射线结构分析研究了氢氧化锆在加热时的特性,发现有氧化锆新的介安的立方变体存在。 随后研究了组成为Ln_2O_3+2ZrO_2的稀土元素和锆的共同沉淀氢氧化合物在加热时的特性,这里Ln指Ce和Pr,发现了在Pr_2O_3—ZrO_2系统中的新化合物Pr_2Zr_2O_7。锆酸鐠Pr_2Zr_2O_7具有黄绿石型的立方结构。空间羣:Fd3m-O_h~7,2=8。此外,证实了有黄绿石型结构的化合物Ce_2Zr_2O_7存在。 文中列举了有关锆酸铈及锆酸镨的某些物理—化学性质的资料。

 
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