crystallite

简明释义

英[ˈkrɪstəlaɪt]美[ˈkrɪstəˌlaɪt]

n. 微晶；皱晶

英英释义

单词用法

同义词

反义词

例句

1.The effects of lanthanum salt-doping on the photocatalytic degradation of methylene blue in solution, phase structure and crystallite size of the TiO2 films were investigated.

研究了镧盐掺杂对样品相结构、晶粒尺寸和光催化降解亚甲基蓝活性的影响。

2.The results show that the basic influencing factor on coke property is the structure of crystallite, as the basic unit of pore wall of coke.

结果表明：焦炭气孔壁最基本单元——微晶结构是影响焦炭宏观性能的最本质因素。

3.The results show that with the increase of milling time, particle size and crystallite size are reduced.

结果表明，随着球磨时间的增加，粉末的颗粒度及晶粒度均不断减小。

4.The branch shape crystallite is mainly composed of iron oxides, i. e. magnetite.

树枝状晶体主要是由铁的氧化物——磁铁矿组成。

5.Shorter chain starch is favorable to form A-type crystallite; while longer chains starch is favorable to form B-type crystallite.

短链淀粉有利于形成A型结构，而长链淀粉倾向于形成B型结构。

6.This paper introduces the overall design of the crosscut machine on crystallite glass line and design of the ultrahigh - pressure cutting.

本文介绍了微晶玻璃生产线上横切机的总体设计及超高压水切割系统的设计。

7.Fiber absorption volume altered according to the change of weight loss, consistent with the changing rule of crystallinity and crystallite size, all supporting the raised hypothesis.

纤维的吸附体积发生了改变，改变规律与结晶度和晶粒尺寸的变化规律以及扫描电镜观察结果相符，都支持文中提出的观点。

8.The results show that amorphization of crystallite is the main form of microstructural evolution during thermal stabilization of PAN fibers.

结果表明，晶区的非晶化转变是原丝在预氧化过程中组织结构演变的主要形式；

9.The composites were similar to natural bone to some extent in crystallite phase composition, crystallite size of hydroxyapatite and micro-structure of collagen fibril.

复合材料的晶相组成，羟基磷灰石晶体大小、胶原纤维的结构等都与天然骨相似。

10.Researchers are studying how crystallites grow during the solidification process.

研究人员正在研究晶粒在固化过程中的生长方式。

11.The crystallite structure can influence the optical properties of the material.

晶粒结构可以影响材料的光学性质。

12.In this experiment, we observed the formation of crystallites in the cooling solution.

在这个实验中，我们观察到冷却溶液中形成了晶粒。

13.A smaller crystallite size typically leads to higher strength in metals.

较小的晶粒尺寸通常会导致金属的强度更高。

14.The size of the crystallite affects the material's mechanical properties.

晶粒的大小影响材料的机械性能。

作文

In the fascinating world of materials science, one term that often arises is crystallite, which refers to a small, ordered region within a polycrystalline material. These crystallites can be thought of as tiny crystals that form during the solidification process of a material. Understanding crystallites is essential for comprehending the properties and behaviors of various materials, including metals, ceramics, and semiconductors.When a material cools from a liquid state, it does not always solidify into a single crystal. Instead, it may form many small crystals, or crystallites, that are randomly oriented in space. Each crystallite has a specific arrangement of atoms, which contributes to the overall structure of the material. The size and distribution of these crystallites can significantly influence the physical properties of the material, such as its strength, ductility, and thermal conductivity.For instance, in metallurgy, the size of crystallites can determine the hardness and tensile strength of metals. Smaller crystallites typically result in stronger materials due to the increased number of grain boundaries, which impede the movement of dislocations – defects in the crystal structure that can lead to deformation. This phenomenon is known as the Hall-Petch relationship, which states that as the size of crystallites decreases, the strength of the material increases.Conversely, if crystallites are too small, they can lead to brittleness, making the material more susceptible to fracture under stress. Therefore, finding the optimal size of crystallites is crucial in material design and engineering. Techniques such as annealing, where materials are heated and then slowly cooled, can be employed to control the growth of crystallites and improve the material's properties.In ceramics, the presence of crystallites plays a vital role in determining the material's performance at high temperatures. For example, certain ceramics are designed with specific crystallite sizes to enhance their thermal stability and resistance to thermal shock. The manipulation of crystallites through various processing techniques allows engineers to tailor materials for specific applications, such as in aerospace or electronic components.Moreover, in the field of nanotechnology, crystallites can be engineered at the nanoscale to create materials with unique properties. Nanocrystalline materials, which consist of crystallites that are less than 100 nanometers in size, exhibit remarkable characteristics, such as increased strength and improved electrical conductivity. This has led to their use in a wide range of applications, from batteries to catalysts.In summary, the concept of crystallite is fundamental in understanding the microstructure of materials and their macroscopic properties. By studying crystallites, scientists and engineers can develop innovative materials that meet the demands of modern technology. Whether in metals, ceramics, or nanomaterials, the careful control and manipulation of crystallites are crucial for advancing material science and engineering. As we continue to explore the potential of materials, the significance of crystallites will undoubtedly remain at the forefront of research and development, paving the way for new discoveries and advancements in various fields.

在材料科学的迷人世界中，一个经常出现的术语是结晶粒，它指的是多晶材料中的小有序区域。这些结晶粒可以被认为是在材料固化过程中形成的微小晶体。理解结晶粒对于理解各种材料的特性和行为至关重要，包括金属、陶瓷和半导体。当材料从液态冷却时，它并不总是固化成单个晶体。相反，它可能形成许多小晶体或结晶粒，这些结晶粒在空间中随机取向。每个结晶粒都有特定的原子排列，这对材料的整体结构有贡献。这些结晶粒的大小和分布会显著影响材料的物理特性，如强度、延展性和热导率。例如，在冶金学中，结晶粒的大小可以决定金属的硬度和抗拉强度。较小的结晶粒通常会导致材料更强，因为增加的晶界数量阻碍了位错的运动——晶体结构中的缺陷，可能导致变形。这种现象被称为霍尔-佩奇关系，它表明随着结晶粒大小的减小，材料的强度增加。相反，如果结晶粒过小，它们可能导致脆性，使材料在应力下更容易断裂。因此，找到结晶粒的最佳大小对于材料设计和工程至关重要。可以采用退火等技术，通过加热材料然后缓慢冷却，来控制结晶粒的生长并改善材料的性质。在陶瓷中，结晶粒的存在在决定材料在高温下的性能方面起着至关重要的作用。例如，某些陶瓷的设计具有特定的结晶粒大小，以增强其热稳定性和抗热冲击能力。通过各种加工技术操控结晶粒，使工程师能够为特定应用量身定制材料，例如在航空航天或电子元件中。此外，在纳米技术领域，可以在纳米尺度上设计结晶粒以创建具有独特特性的材料。纳米晶材料由小于100纳米的结晶粒组成，表现出显著的特性，如增强的强度和改善的电导率。这使它们在电池、催化剂等广泛应用中得到了使用。总之，结晶粒的概念在理解材料的微观结构及其宏观性质方面是基础的。通过研究结晶粒，科学家和工程师可以开发出满足现代技术需求的创新材料。无论是在金属、陶瓷还是纳米材料中，仔细控制和操纵结晶粒对于推动材料科学和工程的发展至关重要。随着我们继续探索材料的潜力，结晶粒的重要性无疑将始终处于研究和发展的前沿，为各个领域的新发现和进步铺平道路。