RT-AA glass tube
It has the advantages of high absorption (0.8~0.92/AM1.5) and low emittance(í▄0.08/80íŠí└5íŠ), and normally it is used in the civil solar water heaters extensively. Its selective absorption layer adopts the graded AL-N cermet layer. Its film structure is ALN/AL-N/AL-N/AL/AL-N (adhesion) which can work effectively in the 200íŠ.
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