With the continuous development of science and technology, electromagnetic waves are more and more widely used in life. Among them, the electromagnetic wave frequency of 1 ~ 20ghz is widely used in wireless communication, high-frequency circuit components and other related fields. Due to the application of absorbing materials in EMI and RCS, absorbing materials are getting more and more attention,...
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Nano zinc oxide and nano titanium oxide are two important and widely used physical sunscreens. Their principle of shielding ultraviolet rays is to absorb and scatter ultraviolet rays. Because they are all N-type semiconductors, the band gap of rutile nano-titanium oxide is 3.0 eV, and the band gap of nano-zinc oxide is 3.2 eV. When irradiated by ultraviolet rays, electrons in the valence band can ...
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