晶体

In polycrystal, triple junction is an important grain defect which plays an important part in the deformation behavior and fracture. However, it is still less known. In this paper, zero-tension-zero test under stress control on tricrystal which grew from pure copper of 99. 999% by the Bridgman method was carried out, and the appearance of surface slip line was also obtained.

在多晶体中，三晶交线是一种重要的晶体缺陷，对多晶体的变形行为和断裂起着重要的影响，但是人们对它的了解和重视程度又是很不够的，本文首先对由99.999％的纯铜随机生长的三晶体进行了拉-零循环加载实验，得到了表面滑移线形貌，实验中采用应力控制。

A new method for calculating the bulk modulus of inorganic crystals from structure parameters was proposed.

基于此提出一种新的由晶体结构参数计算复杂晶体体模量的理论方法。

The development history of calcium fluoride (CaF2) crystals is introduced; its basic perforanmances and properties are summarized.

简述了氟化钙(CaF2)晶体的发展历史，总结其光学特性，介绍了氟化钙晶体的生长新工艺技术和发展。

On the basis of twin-roll thin strip continuous casting experiments and solidification structure characteristic analysis of thin strip and combining with the simulation results of effects of technological parameters, the forming mechanism of solidification structure zone (especially equiaxed crystal zone) on 1Crl8Ni9Ti stainless steel twin-roll thin strip was investigated.

在双辊薄带连铸实验和薄带凝固组织特征分析的基础上，结合对薄带凝固组织区的模拟预测结果，研究了1Cr18Ni9Ti不锈钢双辊薄带凝固组织区的形成机理。结果表明：1Cr18Ni9Ti不锈钢双辊薄带凝固组织中的等轴晶区不但在凝固类型为半固态时形成，在轧制或理想型时也能形成。其形成机理为，熔池中悬浮游离晶体的沉积、聚集以及在枝晶生长前沿的长大和薄带离开二铸辊最小间隙后，薄带/空气界面换热系数骤然降低抑制了柱状枝品的生长，并促使薄带中部未凝固熔体中游离晶体的择优长大

In this paper, we used molecule dynamics simulation technique in researching dielectric property. By analyzing the information that is provided from molecule dynamics simulation, we can got some dielectric properties like dielectric constant and chargeability. Firstly, 3D model of silicon dioxide was been built and geometric optimization was been used to make the model more correctly. Then the model was been put in calculation of molecule dynamics simulation with a definitive temperature.

本文针对氮化硼晶体在极端高温下的介电性能开展研究，首先建立六方氮化硼晶体的微观结构模型，通过几何优化对其进行进一步的结构修正，然后选择合适的力场、系综、积分时间步长和压力温度控制方法，对微观结构模型进行某一温度下的分子动力学计算，动力学计算达到平衡后得到该温度下电介质材料的微观结构模型和动力学特性。

SEM images showed that the PS spheres are well ordered close-packed structures by using vertical deposition method.

通过扫描电镜对胶体晶体表面结构进行表征，得出垂直沉积法组装的胶体晶体模板有序度最高。

Because this non-template method is based on the selective transfer of a single layer of close-packed microspheres from the colloidal crystal film to the PDMS stamp surface, it is possible to realize fine control over the microstructures of colloidal crystal film using a layer-by-layer lift-up process.

这一方法摈弃了传统的模板技术，采用PDMS为印章，在每个揭起过程中选择性地把一个单层的紧密堆积的微球从胶体晶体膜层揭走，通过layer-by-layer的揭起过程，实现了对胶体晶体膜的微观结构的精确控制。

There are gaps among the crystal structures. In order the micro_object to be a continuum, a close-packed Wigner-Seitz model is put forward by the object structure principle.

针对Hamaker理论在工程实际中存在的问题，从物质结构出发分析晶体结构，发现晶体结构存在空隙，Hamaker连续介质假设不成立。

The thermal diffusion coefficient of the crystal was also measured by the l.

用激光脉冲法测量了晶体的热扩散系数，比较了晶体a轴和c轴的热扩散系数随温度的变化关系。

Because of the lower coercive force and high damage threshold, the crystal is chosen and designed for six period patterns.

由于周期极化掺杂氧化镁的铌酸锂晶体具有较低矫顽场和更高损伤阈值的优点，所以选择了该晶体并在其上设计了6个周期图案。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。