Feem ntau, high-frequency nruab nrab cua sov yog nqa tawm nyob rau hauv hluav taws xob teb ntawm ob daim hlau

Feem ntau, high-frequency nruab nrab cua sov yog nqa tawm nyob rau hauv hluav taws xob teb ntawm ob daim hlau

Thaum lub dielectric muab tso rau hauv ib qho kev hloov hluav taws xob, nws yuav rov qab polarized (ib qho tshwm sim uas qhov sib npaug ntawm qhov sib npaug ntawm cov nqi hluav taws xob tshwm sim ntawm qhov chaw lossis sab hauv ntawm dielectric nyob rau hauv qhov kev txiav txim ntawm hluav taws xob teb), yog li hloov hluav taws xob hluav taws xob. nyob rau hauv hluav taws xob teb rau hauv thermal zog.

Qhov hluav taws xob teb zaus siv rau nruab nrab cua sov yog siab heev. Nyob rau hauv nruab nrab, luv luv, thiab ultra luv yoj bands, zaus ntawm ob peb puas kHz mus rau 300 MHz yog hu ua high-frequency nruab nrab cua sov. Yog hais tias qhov zaus tshaj 300 MHz thiab ncav cuag lub microwave band, nws yog hu ua microwave nruab nrab cua sov. Feem ntau, high-frequency nruab nrab cua sov yog nqa tawm nyob rau hauv hluav taws xob teb ntawm ob daim hlau; Microwave nruab nrab cua sov yog nqa tawm nyob rau hauv cov hluav taws xob teb ntawm waveguides, resonant kab noj hniav, los yog microwave antennas.

Thaum lub dielectric yog rhuab nyob rau hauv ib tug high-frequency hluav taws xob teb, lub zog hluav taws xob absorbed ib chav tsev ntim yog P=0.566fE ε rtg δ × 10 (watts/centimeter)

Yog hais tias qhia nyob rau hauv lub tshav kub, nws yog:

H=1.33fE ε rtg δ × 10 (cal/s · cm)

Cov nplaim hluav taws xob ntawm cov phaj hom infrared hluav taws xob qhov chaw yog ib qho chaw tiaj tus uas muaj cov phaj tsis sib haum. Lub pem hauv ntej ntawm lub phaj tiv thaiv yog coated nrog cov ntaub ntawv uas muaj siab reflection coefficients, thiab lub nraub qaum yog coated nrog cov ntaub ntawv uas tsis tshua muaj reflection coefficients, yog li feem ntau ntawm cov tshav kub lub zog yog radiated los ntawm pem hauv ntej. Qhov kub ua hauj lwm ntawm lub phaj tuaj yeem ncav cuag tshaj 1000 degree thiab tuaj yeem siv rau kev sib tsoo ntawm cov khoom siv hlau, cov kav dej loj, thiab cov ntim khoom. Lub raj ntawm lub raj hom infrared hluav taws xob qhov chaw yog ua los ntawm quartz iav nrog tungsten hlau nyob rau hauv nruab nrab, yog li nws tseem hu ua quartz raj hom infrared radiator. Lub wavelength ntawm infrared emissions los ntawm lub teeb thiab tube hom yog li ntawm 0.7 mus rau 3 microns, thiab lawv ua hauj lwm kub kuj yog tsawg. Lawv feem ntau yog siv rau cua sov, ci, ziab, thiab infrared kho nyob rau hauv lub teeb thiab textile industries, raws li zoo raws li nyob rau hauv daim ntawv thov kev kho mob.

www.superbheater.com