Materiaalkunde 1 on OCW Delft lesson 2In this lesson I learned more on the properties of materials. One specific property that stood out for me was Dielectric strength. Other topics were the classification of materials in families and counting with logarithms.
Material propertiesAs mentioned dielectric strength stood out for me as it is a property to which I don't have an intuitive grasp. The guy in the lecture defined it as follows:
"The dielectric strength of a material is a measure of how much a material will interact with electromagnetic waves"And he had this picture on. But what does it mean?! So the radar sphere has a low dielectric response and the ships beam has a high response thereby making it visible on the radar? I think so, so basically high dielectric response indicates that a material will interact with electro magenetic waves, like the definition said... right
|σ/(ωε’)||Current conduction||Field propagation|
|≪ 1||low-conductivity material|
|≈ 1||lossy conducting material||lossy propagation medium|
|≫ 1||high-conductivity material|
This is already very helpfull in my day to day work. Getting a more intuitive grasp of dielectrics also gave me a better grasp of capacitance. A dieelectric is an intergral part of a capacitor. As a dielectric material increases the capacitance rating of a conductor.