dielectric loss

简明释义

介质损耗

英英释义

例句

1.The high frequency operation of the capacitor can lead to increased dielectric loss.

电容器的高频操作可能导致增加介质损耗。

2.In RF applications, minimizing dielectric loss is crucial for maintaining signal integrity.

在射频应用中，最小化介质损耗对于保持信号完整性至关重要。

3.Materials with low dielectric loss are preferred for high-frequency circuit boards.

对于高频电路板，优选低介质损耗的材料。

4.Testing for dielectric loss helps in assessing the quality of insulating materials.

测试介质损耗有助于评估绝缘材料的质量。

5.The dielectric loss in insulators can affect the efficiency of power transmission lines.

绝缘体中的介质损耗会影响电力传输线路的效率。

作文

Understanding the concept of dielectric loss is crucial for anyone involved in electrical engineering or materials science. Dielectric loss, which can be defined as the energy lost as heat in a dielectric material when it is subjected to an alternating electric field, plays a significant role in the performance of electronic devices. This phenomenon occurs due to the lagging of polarization in the dielectric material behind the applied electric field, leading to inefficiencies that can affect the overall functionality of capacitors, insulators, and other electronic components.To delve deeper into this topic, we first need to understand what dielectrics are. Dielectrics are insulating materials that do not conduct electricity but can support an electric field. When an alternating current (AC) voltage is applied to a dielectric, the molecules within the material attempt to align themselves with the changing electric field. However, this alignment does not happen instantaneously, resulting in a phase difference between the applied voltage and the resulting current. This phase difference is where dielectric loss comes into play, as it manifests as heat generated within the material.The amount of dielectric loss can be quantified using the loss tangent, which is the ratio of the imaginary part of the dielectric constant to the real part. A higher loss tangent indicates greater energy dissipation, which can lead to overheating and potential failure of the device. Engineers must therefore select materials with low dielectric loss for applications where efficiency and thermal management are critical, such as in high-frequency circuits or power electronics.One of the most common applications of dielectrics is in capacitors, where they serve to store electrical energy. The presence of dielectric loss can significantly impact the efficiency of capacitors, especially in AC applications. For instance, in radio frequency circuits, the dielectric loss can lead to signal degradation, which is detrimental to the performance of communication systems. Consequently, engineers often use materials with low dielectric loss to ensure that capacitors operate effectively without excessive heat generation.Moreover, the temperature dependence of dielectric loss is another critical factor to consider. As temperature increases, the dielectric loss in many materials also tends to increase, which can exacerbate heating issues in electronic devices. Therefore, understanding the thermal properties of dielectric materials is essential for predicting their performance under various operating conditions.In conclusion, dielectric loss is a fundamental concept that influences the design and performance of many electronic components. By selecting appropriate materials and understanding the implications of dielectric loss, engineers can enhance the efficiency and reliability of electronic devices. As technology continues to advance, the importance of minimizing dielectric loss will only grow, driving further research and development in materials science and electrical engineering. Thus, a thorough grasp of dielectric loss is indispensable for professionals in these fields, ensuring that they can create innovative solutions that meet the demands of modern technology.

介电损耗的概念对于任何参与电气工程或材料科学的人来说都是至关重要的。介电损耗可以定义为当介电材料受到交变电场作用时，作为热量损失的能量，这一现象在电子设备的性能中起着重要作用。由于介电材料中的极化滞后于施加的电场，从而导致效率低下，这可能影响电容器、绝缘体和其他电子元件的整体功能。要深入了解这一主题，我们首先需要了解什么是介电材料。介电材料是绝缘材料，不导电，但可以支持电场。当施加交变电压（AC电压）到介电材料时，材料内部的分子试图与变化的电场对齐。然而，这种对齐并不会瞬时发生，导致施加电压和产生的电流之间存在相位差。这一相位差就是介电损耗发挥作用的地方，因为它表现为材料内部产生的热量。介电损耗的量可以通过损耗正切来量化，损耗正切是介电常数虚部与实部的比率。较高的损耗正切表示更大的能量耗散，这可能导致过热和设备的潜在故障。因此，工程师必须为效率和热管理至关重要的应用选择具有低介电损耗的材料，例如在高频电路或电力电子设备中。介电材料最常见的应用之一是电容器，在电容器中，它们用于储存电能。介电损耗的存在可以显著影响电容器的效率，尤其是在交流应用中。例如，在射频电路中，介电损耗可能导致信号退化，这对通信系统的性能是有害的。因此，工程师通常使用具有低介电损耗的材料，以确保电容器有效运行而不会产生过多的热量。此外，介电损耗的温度依赖性也是一个关键因素。随着温度的升高，许多材料的介电损耗往往也会增加，这可能加剧电子设备中的加热问题。因此，理解介电材料的热特性对于预测其在各种操作条件下的性能至关重要。总之，介电损耗是一个基本概念，影响着许多电子元件的设计和性能。通过选择合适的材料并理解介电损耗的影响，工程师可以提高电子设备的效率和可靠性。随着技术的不断进步，最小化介电损耗的重要性只会增加，推动材料科学和电气工程领域的进一步研究和发展。因此，全面掌握介电损耗对于这些领域的专业人士来说是不可或缺的，确保他们能够创造出满足现代技术需求的创新解决方案。