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At the same time we produce high purity magnesium oxide powder, activate magnesium oxide powder, high purity fused magneisum oxide powder, Strontium Titanate powder, and supply Yttrium Oxide powder, magnesium oxide hydroxide powder.

同时又生产国内领先的高纯度氧化粉、高纯度活性氧化粉、高纯度电熔陶瓷氧化粉、钛酸锶粉等粉体材料,并还能提供高纯度二氧化钛粉和氧化钇粉以及高纯度氢氧化等原料。

The Mg-rich volcanic rocks consist of high-Mg decite and high-Mg basalt which are the products of congenetic magma,in Ashele are, Xinjiang. In comparison with tholeiite, their εNd are obviously low, implying that they are contaminated by the oceanic sediments during their forming process.

阿舍勒富火山岩由高英安和高玄武岩组成它们可能是同源岩浆的产物,与共生的拉斑玄武岩相比,富火山岩钕同位素明显富集,反映在其形成过程中受到了大洋沉积物的混染。

In this paper the author overviews mass magnesia concrete dam thchnical origin, the present status here and abroad, and available primal problems; descripts theexpansive character of magnesia concrete, fundamental force performances and long-term lasting quality, derivates all the equations of temperature field and temperature stress field, analysises the existing canonic calculating autogenous volume deformation model of the micro-expansive concrete, at last select the expansion model of dynamics for calculating.

本文综述了大体积混凝土氧化筑坝技术的由来、国内外研究现状、优势及存在的主要问题;叙述了掺氧化微膨胀混凝土的膨胀特点、基本力学性能及长期耐久性能;推导了计算温度场及温度应力场的全部公式。对现有计算氧化混凝土自生体积变形的几个典型模型进行了深入的研究和分析,阐述了它们各自的优缺点,最终选定动力学模型作为计算氧化混凝土自生体积变形的数学模型。

The phase constitutions of Magnesia-based dry vibratable materials is designed by the analysis of phase equilibrium digrams, in which the periclase is host crystalline phase, the Spinel, Forsterite and Monticellite et al are the bonding phase in matrix.

本文通过相图分析设计了质干式振动料的物相组成,其主晶相为方石,基质为橄榄石、尖晶石及少量的钙橄榄石等。

The influence of nanocrystalline particles and catalysts on the hydriding and dehydrogenating properties of magnesium-based hydrogen storage materials are summarized in this paper.

总结了纳米晶、催化剂改性等对基储氢材料吸放氢性能的影响,介绍了不同基储氢复合材料的吸放氢性能以及基于密度泛函理论的第一原理计算方法在基储氢材料吸放氢性能方面所做的一些基础理论研究,指出随着量子化学、凝聚态物理等学科以及计算机技术的发展,理论计算方法在研究基储氢材料吸放氢性能方面的作用将越来越重要。

By the combination of experimental results with theory of crystal growth, some growth models and growth mechanisms were proposed. Research results confirmed that pillar-shaped TaC whisker with spherical droplet at the end grew via a vapor-liquid-solid mechanism, pillar-shaped whisker with pyramid-like end was formed via a vapor-solid mechanism, awl-shaped TaC whisker with zigzag end formed via a liquid-solid mechanism, awl-shaped TaC whisker with growth step at the end has a growth mechanism of screw dislocation mechanism. The growth mechanism of dumbbell-shaped MgO nanowhisker and NaCl particle-decorated MgO nanowhisker is VS; C and MgO powder-yielded MgO nanowhisker was formed via a VLS mechanism, Mg powder-yielded MgO microwhisker and MgO microsized or nanosized crystal sheet grew via a VS mechanism. In the Si and SiO〓 nanostructures, Si nanowires formed in higher-temperature zone grew via oxide-assistant mechanism, while Si nanowires or nanorods formed in lower-temperature zone have a growth mechanism of VLS, and the growth mechanism of SiO〓 nanowires is VS.

研究确定呈平直柱状且头部带有球形颗粒的TaC晶须是通过气-液-固机制生长;头部呈之字型的锥状TaC晶须则通过液-固机制生长;晶须头部为四棱锥状的粗长TaC晶须的生长机制是VS机制;顶端呈锥状且有生长台阶的TaC晶须通过螺位错机制生长;哑铃状氧化晶须和氯化钠颗粒修饰的氧化纳米晶须的生长机制是气-固机制:当采用C+MgO粉提Mg源时形成的氧化纳米晶须的生长机制是VLS,而采用直接热蒸发Mg粉时得到的氧化微米晶须的生长机制为VS,纳米和微米晶片的生长机制均为VS机制;在高温区,硅纳米线的生长机制是助氧化机制,在低温区硅纳米线和纳米棒的生长机制是VLS机制,而氧化硅纳米线的生长中VS机制占主导地位。

The results show that the CNTs are dispersed effectively by bell jar immersing precast block casting. The maximal tensile strength and the elongation of the AZ31/CNTs composites are enhanced by 41.3% and 119.4%, respectively, and the elastic modulus and micro-hardness are also raised by 67.8% and 66.9%, respectively, when compared with those of the as-cast AZ31 Mg alloys. The CNTs can greatly refine the grains of the composites, playing a good role in reinforcing the matrixes of AZ31 Mg alloy. The fracture sections of the composites mainly consist of dimples and prisms, which demonstrates quasicleavage fracture modes.

结果表明:钟罩压块法可以有效地将碳纳米管分散到合金熔体中;CNTs对AZ31合金的力学性能有较强的增强效果,与本研究中的铸造AZ31合金相比,AZ31/CNTs复合材料的最大抗拉强度和伸长率分别提高41.3%和119.4%,弹性模量和显微硬度分别提高67.8%和66.9%;CNTs对AZ31合金基体晶粒的细化作用显著,与基体界面结合较好;复合材料试样断口形貌由韧窝和撕裂棱组成,呈现准解理断裂特征。

The results show that the CNTs are dispersed effectively by bell jar immersing precast block casting. The maximal tensile strength and the elongation of the AZ31/CNTs composites are enhanced by 41.3% and 119.4%, respectively, and the elastic modulus and micro-hardness are also raised by 67.8% and 66.9%, respectively, when compared with those of the as-cast AZ31 Mg alloys. The CNTs can greatly refine the grains of the composites, playing a good role in reinforcing the matrixes of AZ31 Mg alloy. The fracture sections of the composites mainly consist of dimples and prisms, which demonstrates quasi- cleavage fracture modes.

结果表明:钟罩压块法可以有效地将碳纳米管分散到合金熔体中;CNTs对AZ31合金的力学性能有较强的增强效果,与本研究中的铸造AZ31合金相比,AZ31/CNTs复合材料的最大抗拉强度和伸长率分别提高41.3%和119.4%,弹性模量和显微硬度分别提高67.8%和66.9%;CNTs对AZ31合金基体晶粒的细化作用显著,与基体界面结合较好;复合材料试样断口形貌由韧窝和撕裂棱组成,呈现准解理断裂特征。

Imagnesite Chrome Brick:Diect-bonded Magnesite Chrome Brick ,Electro-fused Re-bonded Magnesite Chrome Brick.

铬砖、直接结合铬砖、电熔再结合铬砖。铬砖:是以烧结砂和氧化铬为原料经同压成型、高温烧成制得。

Magnesium monoperoxyphtbalate is composed using benzoic anhydride,magnesium oxide and hydrogen peroxide .

以苯酐、氧化和双氧水为原料,研究了均匀设计在单过氧邻苯二甲酸合成中的应用,考察了苯酐与氧化的摩尔比、反应温度和反应时间对单过氧邻苯二甲酸合成的影响,确定了最佳反应条件。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

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