Vacuum TubeCharacteristics：Vacuum tubes assimilate the advanced 12 layers of spattering deposition of trivalent technology, high borosilicate glass, gradual change of ALN/AIN-SS/CU selective complex absorptive coating.Ang these make vacuum tubes have high performance of absorption and low reflection ratio. Through the interlayer, vacuum has a unique effect of thermo, with its temperature up to 380℃ of idle sunning, performing a strong heating ability.Technical Parameters:Tube structureAll-glass double deck co-axial structureGlass materialHigh Borosilicate 3.3 glassOuter tube diameter and glass thicknessφ47±0.7mm; Glass thickness 1.6±0.15mmφ58±0.7mm; Glass thickness 1.6±0.15mmφ70±0.7mm; Glass thickness 1.6±0.15mmInner tube diameter and glass thicknessφ37±0.7mm; Glass thickness 1.6±0.15mmφ47±0.7mm; Glass thickness 1.6±0.15mmφ58±0.7mm; Glass thickness 1.6±0.15mmTube length800mm, 1200mm, 1500mm, 1600mm, 1800mm, 1900mm, 2000mm, 2100mm, etcAbsorption coating propertyCoating materialCU/SS-ALN(H)/SS-ALN(L)/ALNSediment methodThree target magnetron spattering plationAbsorptive ratioa=0.92-0.96(AM1.5)Emission ratioe=0.04-0.06 (80℃±5℃)Vacuum degreeP≤5.0x10-3 （PA）Stagnation temperature (temperature inside of empty evacuated tubes260-350℃Average heat lossULT0.4-0.6W/（㎡*℃）Hail resistanceφ30mmPressure-endure1Mpa
