查询词典 grain crystal

This invention discloses a preparation method for anti-corrosion rare earth magnet material characterizing that it takes the optimized grain-boundary phase design as the starting point on the basis of a dual alloy method to select Nd base alloy with high crystal forming ability as the assist alloy and reduces the temperature of the press mold blank in a quartz container to room temperature from over grain-boundary phase melting point with the water extraction way to get enough cooling rate and guarantee the non-grain-boundary phase, compared with the material of the same composition prepared by ordinary method, the weightlessness of this invented material reduces over 30% after testing the weightlessness of the material by laying it for 96 hours under 121deg.C, 2 atmosphere and 100% humid environment to show the advanced performance of anti-corrosion.

本发明公开了一种耐腐蚀稀土永磁材料的制备方法，其特征是它在双合金法制备工艺的基础上，以优化晶界相设计为出发点，选取具有较高非晶形成能力的Nd基合金为辅合金，并在烧结回火时将置于耐高温石英容器中的压型坯件，从晶界相熔点以上以水淬冷却的方式降温至室温，以达到足够的冷却速率，确保得到非晶晶界相，根据本发明制得的耐腐蚀稀土永磁材料，通过测量在121℃、2个大气压以及100％湿度环境下放置96小时后材料的失重情况，结果显示本发明得到的材料与常规方法制备的相同成分的稀土永磁材料相比失重减少了30％以上，充分证明其具备了更优越的耐腐蚀性能。可广泛应用于电子、汽车、计算机、电力、机械、能源、环保、国防、医疗器械等领域。

The results show that, after treated with microwave radiation, the surface free energy of the powder is enhanced from 39.6mJm^(-2) to 41.8mJm^(-2), This is mainly caused by the rearrangement of electric charges on the grain crystal surface, and this phenomenon is coincident with the theory of electron transition caused by energy band splitting of the grain crystal surface.

测定结果显示微波辐射后硫酸钙粉末的表面自由能得到提高，从39.6mJm^(-2)增加到41.8mJm^(-2)，其主要原因是使硫酸钙表面能的极性成分得到了较大的提高。这一结果归于微波幅射引起晶粒表面的电荷重排，与晶粒表面能带分裂引起的电子跃迁理论是相吻合的。

Under the high frequency vibrating action, the crystal grain formed on the surface of the crystal nucleus eradiation equipment would be broken and peeled off, thereby ejected to zinc molten pool continuously and served as crystal nucleus source of equiaxed grain during solidification.

结果表明，当一种带有冷却结构且进行高频振动的晶核发射器插入锌液内时，锌液在晶核发射器表面迅速形核且长大，在高频振动作用下表面形成的晶粒将被折断剥离，从而连续不断地弹射到锌液中，成为凝固过程中形成大量等轴晶的晶核来源；采用带有水冷和气冷结构的晶核发射器对锌液进行振动激发形核处理后，锌凝固组织中的等轴晶率可分别提高到65%和80%。

The results show that the electrochemical window is 3.40V, the crystal grain of new deposit aluminum is ideal, and the boundary of crystal grain is perfect. The main element is aluminum and trace element is oxygen on the surface of cathode.

研究结果表明：铝基离子液体Br-AlCl3的电化学窗口为3.40V；扫描电镜分析表明，阴极新生态的铝晶粒生长完整、晶界完善；X射线能谱分析阴极表面新生态铝的结果显示主元素为铝，微量元素为氧。

The results show that the orientation of crystal grain is changed and crystal grain is refined by magnetic field. The optimal properties of welded joint appears when magnetic field frequency is 20 Hz.

结果表明，外加纵向磁场通过电磁搅拌作用改变晶粒的结晶方向、细化晶粒，在磁场频率为20 Hz时，焊接接头的力学性能达到最佳。

The results show that Sb addition can diminish the crystal grain, but the content of segregative phase at crystal boundary increases, and the current efficiency of material is low. Compared with Sb addition, Sn addition can also diminish the crystal grain, the current efficiency increases, the content of segregative phase at crystal boundary reduces, but diffusional corrosion of the anode surface is not uniform. The cooperation of Sb and Sn can prevent Si from segregating effectively and enhance the current efficiency obviously. At the same time, anode materials have preferable surface dissolution characteristics.

结果表明： Sb具有细化晶粒的作用，但晶界存在较多偏析相，电流效率偏低；与Sb相比较， Sn也具有细化晶粒的作用，电流效率有所提高，晶界偏析相较少，但阳极的表面腐蚀溶解不均匀； Sn和Sb的协同作用在于能有效地抑制Si的偏析，显著提高阳极的电流效率，使得阳极表面具有良好的腐蚀溶解性。

In annealing course the size change of crystal grain is unapparent. With annealing temperature go up the size of crystal grain of each phase has an increase tendency, the increase tendency will decelerate when reaching the determinate size of crystal grain.

退火过程中晶粒尺寸变化不大，颗粒中各组成相随着退火温度的升高晶粒尺寸有增大的趋势，在达到一定晶粒尺寸时晶粒长大的趋势变缓。

By mineralogical analysis of Jidong magnetite concentrates what can be found is that: It is mainly composed of magnetite, concentrate grain is medium-coarse granular crystal texture, the most is subidiomorphic or xenomorphic, is chevron and granulated, surface of the concentrate is smooth, minority of concentrate has inclusion or intergrowth, grain inch normally is 0.05~0.16mm, there is incompletely cleavage in concentrate grain.

矿相分析表明：冀东磁铁精矿粉以磁铁矿为主，矿粉颗粒为中粗粒变晶结构，多为半自形或他形，呈尖棱碎粒状，其表面光洁平滑，少数有包裹体或连生体，粒径一般为0.05～0.16mm，矿粒存在不完全解理。

Accounting by Scherrer equation, it is showed that the grain size of TiN in (111) and (200) crystal face is less than 20nm at large and the size in (220) crystal face is mostly less than 10nm, forming nanocrystal grain, consequently coming into being surperhard result by grain refinement.

采用Scherrer公式计算出TiN相的(111)和(200)晶面的晶粒尺寸普遍0nm，(220)等晶面对应的晶粒尺寸普遍0nm，形成了TiN纳米晶，从而产生晶粒细化致硬的效果。

Sodium chloride is generally marketed as coarse salt, fine-grain salt, crystal salt, or table salt.

氯化钠一般被销售作为粗盐、 fine-grain 盐、水晶盐或食用盐。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。