Dielectric ceramics have high resistance and can withstand strong electric field without breakdown, mainly including electrical insulation ceramics and capacitor ceramics. Sensitive ceramics are a kind of functional ceramics that are sensitive to the changes of some physical quantities. According to their different functions, they can be divided into many kinds of sensitive ceramics, such as heat-sensitive, humidity-sensitive, light-sensitive and gas-sensitive, which can respond sensitively to the changes of temperature, humidity, light and gas. It is widely used in instrument manufacturing, public transportation and household appliances. Moreover, some ceramics are even developing to a more sensitive collection function, so that we can feel all kinds of changes around us in time. Think about it, if the ceramic products we watch at home can respond sensitively to light and temperature, then we can see that it changes all the time and is more ornamental.