Feature:1) Structure: all glass coaxial dual tube
 
2) Material: high borosilicate glass 3.3
3) Interferential coating: copper, aluminum nitride
4）Higher Absorbance, Lower emittance, dry exposure up to 270°C
5）Higher efficiency, more heating
6) Lift time: 15 years
 
 
 Absorbance coating layout:
1--metal reflecting layer(copper)
2--absorbance layer(SS aluminum nitride metal ceramic)
3--remittance reducer layer(aluminum nitride)