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掺杂

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The results show that in the sintering process of clinker more La and Ce are distributed in the silicate phase, which form into solid solution with it ; The dopping effects of La and Ce induce the aberrance of stress field of diffusive medium, which decrease the activation energy of particles diffusing, and accelerate particles diffusing during the solid state reaction.

结果表明,稀土元素La和Y在熟料煅烧过程中更多地分布在硅酸盐相中形成固溶体;稀土离子的掺杂作用,导致扩散介质中应力场的畸变,降低了质点的扩散活化能,从而对固相反应中的质点扩散起促进作用。

Oxygen vacancies in 〓 occured nearby the Eu, Pb atom as Eu dopping BaPbO〓.

且在〓中,随着Eu的掺杂,铅、铕原子周围均出现氧空位。

Arrange. The conductor band botton of the substrate material is modulated periodically by alternately dopping, leading to shape similar to sine-squared potential.

由于交替掺杂,衬底材料的导带受到周期调制形成一个个十分类似于正弦平方形式的量子阱。

At 800 and 900℃, Ti-45al-10Cr alloy formed a similar layered scale with Tial, consisting of an outer layer of TiO2, an intermediate al2O3 barrier and an inner layer of a mixture of al2O3 and TiO2, exhibited larger weight gains than Ti-50al due to the dopping effect of Cr.

结果表明,Ti-45Al-10Cr合金在800和900℃形成的氧化膜具有与TiAl合金同样的分层结构,外层为Ti02,内层为Ti02和al2O3的混合氧化物,在内外氧化层中间有一富Al2O3的中间层,但内氧化层中有大量Cr掺杂、其氧化增重比Ti-50al的大。

The effects of adding SnO2 or Nb2O5 on the high-permeability MnZn ferrites were studied on the basis of microstructure analysis.

从分析材料微观结构入手,研究了SnO2和Nb2O5掺杂对高磁导率MnZn铁氧体材料性能的影响。

Work on mesoscopic superconducting films has demonstrated interesting new features associated with the interplay between fluxions and artifacts.

在超导材料方面,生长出具有国际一流水平的氧化物高温超导单晶;在铁基高温超导材料方面,获得最高的超导转变温度;在超导机理的研究方面,建立了一些行之有效的手段,如低温比热、隧道谱、角分辨光电子谱、红外光电导谱等等,利用这些重要手段获得了一些重要结果,如从比热角度提出欠掺杂氧化物超导体应该具有一个费米弧基态,利用高精度角分辨光电子谱测量第一次观察到115meV和150meV两个新的高能量精细结构。

In the folk literary genealogy, myth and narrative poems can not be clearly separated or irrelevant, but mixed with many elements-religion, history, wars and life, etc.

在裕固族的民间文学谱系中,神话、叙事诗的内容和意味并非泾渭分明、各不相关,而是相互包含和掺杂着宗教、历史、战争、生活等多种元素。

Moreover,py- rochlore phase formes in BaTiO_3 ceramics when the amounts of rare-earth element exceed its solid solubility.

小离子半径的 Yb~(3+)掺杂有利于提高居里温度,改善容量温度特性,使瓷料满足 EIA X8R 规范要求。

Simultaneously, the exports of ionization rate and nonionzed concentration are set up as a powerful tool for studying thoroughly the freeze-out effect. dN〓/dp and dN〓/dn are neglected in the linearized equation system of the iteration methods of Newton and Gummel, due to having lower 15 orders or more than dN〓/dn and dN〓/dp, thus the computing effort is cut down with no effect on precision. A new cut-off technique is adopted to accelerate the convergence speed, about twice reduced for Newton iteration method and six times or so for Gummel iteration method. The approximate formulae of Fermi-Dirac statistics are also put forward with simpler form and higher precision. 3. A term dependent on time is added to the electron and hole current succession equations respectively. It is only this model that conservation of charge in transient analysis and alternating small-signal analysis at low temperature can be kept by. 4. The performance of SE-PISCES is explained by the simulation example of PISCES-2B, diode.

研究了低温半导体器件模拟的数值方法:对载流子浓度进行了新的归一化;编制了不考虑掺杂所引进的内建电场时的电离率计算程序;由于低温杂质电离率随偏压状态而变化,为此编制了每次求解迭代时的电离浓度计算程序,并将其插入到求解迭代程序中;同时,设置了杂质电离率和未电离杂质浓度的出口点,为更深入地研究冻析效应提供了有力工具;在Newton迭代法和Gummel迭代法的线性化方程组中忽略了dN〓/dp、dN〓/dn,是因为它们比dN〓/dn、dN〓/dp低15个数量级以上,这样减小了计算量又不影响模拟精度;对Newton迭代法和Gummel迭代法采取了新的截断技术,提高了收敛速度,Newton法迭代法和两次左右,Gummel法减少六次左右;给出了表达式更简单而精度更高的Fermi-Dirac积分近似计算公式。

Tb-doped WO3 nanopowders was synthesized from fresh-made H2WO4 and Tb(NO3)3 by using H2C2O4 as dispersant and precipitator.

用Na2WO4和盐酸反应新生成的H2WO4与Tb(NO3)3,H2C2O4作起始原料,制备了稀土离子Tb(上标 3+)掺杂的WO3纳米粉体。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。