The semi-finished product is used by the solar industry in absorbers for flat-plate collectors with full-surface or strip absorbers, in tube collectors as well as in air and large-surface facade collectors.

Over 20 years, the highly selective absorber band produces more than 10,000 kWh of usable energy per square metre of surface. Collectors with eta plus are a clear alternative to conventional energy generation and also help to considerably reduce CO2 emissions.

→ BlueTec eta plus is produced using an air-to-air vacuum coating process. The so-called magnetron sputtering is the method used for applying the coating to the metal substrate

→This process sets new technical standards

→The magnetron sputter process employed by BlueTec to apply the coating to the metal substrate meets even the most stringent quality requirements.

→The eta plus coating is a ceramic metal compound.

→This so-called CERMET (ceramic metal compound) is comprised of several single layers in which metal particles are embedded in a ceramic matrix. Due to scattering effects, they absorb radiation within a certain wavelength range.

→The metal content of the eta plus coating system gradually decreases towards the surface.

→ The coating applied to the surface of the substrate is a passivating metal coating. It serves as a diffusion barrier as well as a means of corrosion protection for the metal substrate.

→ The inner layers are the functional layers, in which most of the light is absorbed.

→ The top layer is a pure ceramic and also serves as an anti-reflection coating and as an extremely durable protection for the entire system.

technical properties.

→above-average aging and temperature resistance

→outstanding homogeneity of the coating over the entire material width

→absorption 95%, thermal emission 5%

→top quality and a zero-emission industrial production process.