理想晶体

迄今为止的超精密加工模拟研究中，都假定材料为内部没有任何缺陷的理想晶体，这与实际情况差别较大。

Today , materials used in the simulation are all been assumed as ideal crystal without any defects which is differentiated with the reality .

通过对理想晶体模型的计算，本研究找出了晶体纯净度在定义上的不足并提出了一种可能的解决方案。

It is found by calculation about ideal crystal model that the existing definition of crystal clarity has some shortcomings , and a feasible solution is put forward .

纳米薄膜的断裂接近脆性断裂，断裂强度符合Griffith理想晶体脆断理论；纳米镍丝在断裂过程中表现出微弱塑性。

The rupture of nano film is more like brittle fracture and accords with Griffith theory of rupture , but that of nano wire is more like tough fracture with plastic flow .

本文根据晶界结构单元模型选择理想晶体及短周期晶界为参考结构推广了Read-Shockley方程到高角晶界。

The Read-Shockley equation has been extended to high angle boundary regime by defining the perfect crystal or short period boundaries as reference structures in terms of the grain boundary structural unit model .

在测量所得的加工误差下，考虑由于束流宽束给衍射性能造成的影响，计算了实际晶体相对于理想晶体的理论衍射效率。

Based on the position error and the effect of the width of the beam , the efficiency of the real crystal relative to the academic crystal was calculated .

理想晶体（包括蓝宝石）的颜色与占据其晶格的微量过渡金属元素的种类及含量有直接的关系。

There is a direct relation between the color of ideal crystals ( including sapphire ) and the varieties and contents of the trace transition metal ions occupying their lattice .

加入少许的点缺陷后，晶体内部的应力和能量相对完整晶体变化并不显著，从而说明在考虑系统的状态方程时将带有少量点缺陷的晶体近似为理想晶体的做法是可行的。

That is to say the method which looks crystal with a few point defects as perfect one is viable when we study state function of the system , but point defects affect much radial distribution functions .

单层石墨是理想二维晶体，不仅可以十分稳定的存在于通常环境下，而且还表现出很多优异的性质。

Graphene is an ideal two-dimensional crystal ; it not only exists very stable in the normally environment , but also show a lot of excellent properties .

介绍了理想二维等离子体光子晶体的结构和理论。

The structure and theory of ideal two-dimensional plasma photonic crystals are introduced .

这种周期极化晶体，可以应用晶体最大的非线性系数，避免三波的走离效应，理论上可以应用晶体的整个通光范围，是目前理想的非线性光学晶体。

This crystal is an ideal nonlinear crystal , which can apply the maximum nonlinear coefficient , avoid the walk-off effect and apply the whole transmission range of the crystal .

结果显示，多元有机酸类转晶剂作用效果最显著，可以获得长径比近1：1的理想短柱状晶体。

The results showed that multiple organic acids crystal modifier had the most significant effect and could prepare out of ideal short prismatic crystal of α - hemihydrate gypsum with aspect ratio closed to 1:1 .