spontaneous nucleation

简明释义

自发成核

英英释义

例句

1.Researchers observed that spontaneous nucleation 自发成核 significantly affects the formation of ice in clouds.

研究人员观察到，自发成核显著影响云中冰的形成。

2.The phenomenon of spontaneous nucleation 自发成核 is crucial in materials science for developing new alloys.

在材料科学中，自发成核现象对开发新合金至关重要。

3.The study aimed to understand the mechanisms behind spontaneous nucleation 自发成核 in polymer solutions.

该研究旨在了解聚合物溶液中自发成核的机制。

4.During the cooling process, spontaneous nucleation 自发成核 can lead to the rapid formation of crystals.

在冷却过程中，自发成核可以导致晶体的快速形成。

5.In the process of crystallization, spontaneous nucleation 自发成核 can occur when the solution becomes supersaturated.

在结晶过程中，当溶液过饱和时，可以发生自发成核。

作文

In the field of materials science and physical chemistry, the concept of spontaneous nucleation plays a crucial role in understanding how new phases or structures form within a material. Spontaneous nucleation refers to the process by which small clusters or nuclei of a new phase emerge without any external influence or intervention. This phenomenon is particularly important in various natural and industrial processes, such as crystallization, polymerization, and the formation of aerosols. To better understand spontaneous nucleation, we can consider the example of ice formation in supercooled water. When water is cooled below its freezing point, it can remain in a liquid state due to the absence of nucleation sites for ice crystals to form. However, when the conditions are just right, tiny ice nuclei can spontaneously form, leading to the rapid growth of ice crystals. This illustrates how spontaneous nucleation can occur under specific thermodynamic conditions, ultimately resulting in a significant change in the material's state.In industrial applications, spontaneous nucleation is essential for controlling the properties of materials. For instance, in the production of pharmaceuticals, the crystallization process must be carefully managed to ensure that the desired crystal form is achieved. If spontaneous nucleation occurs too quickly or uncontrollably, it can lead to the formation of undesirable polymorphs, which may have different solubility and bioavailability characteristics. Therefore, understanding the factors that influence spontaneous nucleation is vital for optimizing manufacturing processes and ensuring product quality.Moreover, spontaneous nucleation is not limited to solid-state transformations; it also plays a significant role in gas and liquid systems. For example, in atmospheric science, the formation of cloud droplets is influenced by spontaneous nucleation of water vapor into tiny liquid droplets. This process is critical for cloud formation and precipitation, impacting weather patterns and climate.Theoretical models and simulations have been developed to predict and analyze spontaneous nucleation. These models take into account various factors, including temperature, pressure, and the presence of impurities, which can either promote or inhibit the nucleation process. By studying these parameters, scientists can gain insights into the kinetics of spontaneous nucleation and its implications for material behavior.In conclusion, spontaneous nucleation is a fundamental concept that underpins many natural and industrial processes. Its understanding is essential for advancing materials science and engineering, as well as for addressing challenges in various fields such as pharmaceuticals, environmental science, and nanotechnology. As research continues to evolve, the insights gained from studying spontaneous nucleation will undoubtedly lead to innovative solutions and improved technologies that harness the power of this intriguing phenomenon.

在材料科学和物理化学领域，自发成核的概念在理解材料内部新相或结构的形成中起着至关重要的作用。自发成核是指在没有任何外部影响或干预的情况下，新相的小簇或核的出现。这种现象在各种自然和工业过程中尤为重要，例如结晶、聚合和气溶胶的形成。为了更好地理解自发成核，我们可以考虑超冷水中冰形成的例子。当水被冷却到其冰点以下时，由于缺乏冰晶形成的成核位点，它可以保持液态。然而，当条件恰到好处时，微小的冰核可以自发形成，导致冰晶的快速生长。这说明了在特定热力学条件下，自发成核如何发生，最终导致材料状态的显著变化。在工业应用中，自发成核对控制材料的性质至关重要。例如，在制药生产中，结晶过程必须得到仔细管理，以确保达到所需的晶体形式。如果自发成核发生得过快或不受控制，可能会导致不希望的多晶型的形成，这些多晶型可能具有不同的溶解度和生物利用度特性。因此，理解影响自发成核的因素对于优化制造过程和确保产品质量至关重要。此外，自发成核不仅限于固态转变；它在气体和液体系统中也发挥着重要作用。例如，在大气科学中，云滴的形成受到水蒸气自发成核成微小液滴的影响。这个过程对云的形成和降水至关重要，影响天气模式和气候。已经开发出理论模型和模拟来预测和分析自发成核。这些模型考虑了各种因素，包括温度、压力和杂质的存在，这些因素可以促进或抑制成核过程。通过研究这些参数，科学家可以深入了解自发成核的动力学及其对材料行为的影响。总之，自发成核是一个基础概念，支撑着许多自然和工业过程。理解这一点对于推动材料科学和工程的发展以及应对制药、环境科学和纳米技术等各个领域的挑战至关重要。随着研究的不断发展，从研究自发成核中获得的见解无疑将导致创新解决方案和改善技术，利用这一引人入胜的现象。