nucleation time

简明释义

成核时间

英英释义

例句

1.The effectiveness of the catalyst was evaluated by its impact on the nucleation time of the reaction.

催化剂的有效性通过其对反应成核时间的影响来评估。

2.The nucleation time refers to the duration required for new phase formation in a material.

成核时间是指材料中新相形成所需的持续时间。

3.A shorter nucleation time can lead to more uniform particle sizes in manufacturing.

更短的成核时间可以导致制造过程中颗粒尺寸更加均匀。

4.In crystal growth studies, understanding the nucleation time is crucial for optimizing production processes.

在晶体生长研究中，理解成核时间对于优化生产过程至关重要。

5.Researchers measured the nucleation time of ice crystals in various temperatures.

研究人员测量了不同温度下冰晶的成核时间。

作文

Nucleation is a fundamental process in various fields, including physics, chemistry, and materials science. It refers to the initial step in the phase transition where a new phase begins to form. One critical aspect of nucleation is the concept of nucleation time, which is the duration required for the formation of stable nuclei that can grow into larger structures. Understanding nucleation time is essential for scientists and engineers as it influences the properties and performance of materials, such as crystals, polymers, and metals.In the context of crystallization, nucleation time plays a vital role in determining the size and quality of the crystals formed. When a substance transitions from a liquid to a solid state, the molecules must first come together to form small clusters or nuclei. The nucleation time is the period during which these clusters are created before they can grow into larger crystals. If the nucleation time is short, many nuclei can form quickly, leading to smaller crystals with a high surface area. Conversely, a longer nucleation time may result in fewer nuclei, allowing larger crystals to form, which can have different physical properties.In industrial applications, controlling nucleation time is crucial for optimizing production processes. For example, in the manufacture of pharmaceuticals, the crystallization process must be carefully controlled to ensure that the desired crystal form is achieved. If the nucleation time is not properly managed, it can lead to polymorphism, where different crystal forms of the same compound are produced, potentially affecting the drug's efficacy and stability.Moreover, nucleation time also has implications in the field of material design. Engineers often strive to create materials with specific properties by manipulating the nucleation time. For instance, in metallurgy, controlling the nucleation time during the cooling of molten metals can influence the microstructure of the final product. A rapid nucleation time can lead to fine-grained structures, enhancing strength and toughness, while a slower nucleation time may produce coarser grains, which could reduce mechanical properties.Understanding the factors that affect nucleation time is also essential for predicting and controlling phase transitions. Various parameters, such as temperature, pressure, and the presence of impurities, can significantly influence nucleation time. For instance, increasing the temperature may decrease the nucleation time by providing the necessary energy for molecules to overcome the energy barrier for nucleation. Similarly, the addition of certain additives can either accelerate or decelerate nucleation time, depending on their nature and concentration.In conclusion, nucleation time is a critical parameter in the study of phase transitions and material properties. Its understanding allows researchers and engineers to manipulate the formation of new phases, leading to improved materials and processes across various industries. By exploring the intricacies of nucleation time, we can unlock new possibilities in material science and enhance our ability to design and produce advanced materials for future applications.

成核是物理、化学和材料科学等多个领域中的一个基本过程。它指的是相变中的初始步骤，在这一过程中，新的相开始形成。成核的一个关键方面是成核时间的概念，即形成可以成长为更大结构的稳定核所需的持续时间。理解成核时间对科学家和工程师至关重要，因为它影响材料的性质和性能，例如晶体、高分子和金属。在结晶的背景下，成核时间在决定形成的晶体的大小和质量方面起着至关重要的作用。当物质从液态转变为固态时，分子必须首先聚集在一起形成小簇或核。成核时间是这些簇被创建的期间，直到它们可以长成更大的晶体。如果成核时间很短，可以迅速形成许多核，从而导致较小的晶体，具有高表面积。相反，较长的成核时间可能导致较少的核形成，使得较大的晶体能够形成，这可能具有不同的物理性质。在工业应用中，控制成核时间对于优化生产过程至关重要。例如，在制药的制造过程中，结晶过程必须仔细控制，以确保实现所需的晶体形态。如果成核时间未得到适当管理，可能会导致多晶型现象，即同一化合物产生不同的晶体形态，可能影响药物的有效性和稳定性。此外，成核时间在材料设计领域也具有重要意义。工程师们常常努力通过操控成核时间来创造具有特定性质的材料。例如，在冶金学中，控制熔融金属冷却过程中的成核时间可以影响最终产品的微观结构。快速的成核时间可以导致细晶结构，增强强度和韧性，而较慢的成核时间可能产生粗晶，这可能降低机械性能。理解影响成核时间的因素对于预测和控制相变也至关重要。各种参数，如温度、压力和杂质的存在，都可以显著影响成核时间。例如，增加温度可能通过提供必要的能量使分子克服成核的能量障碍，从而减少成核时间。类似地，某些添加剂的加入可以加速或减缓成核时间，具体取决于它们的性质和浓度。总之，成核时间是相变和材料性质研究中的一个关键参数。其理解使研究人员和工程师能够操控新相的形成，从而在各个行业中改善材料和工艺。通过探索成核时间的复杂性，我们可以解锁材料科学的新可能性，并增强我们设计和生产先进材料以满足未来需求的能力。