Coating Technology

Absorption layer

Coatings that influence the optical characteristics of the substrate in a targeted manner by absorbing part of the range. The absorbed energy is converted into heat.

Agitator bead mill

A grinding system that consists of a static cylindrical casing and an agitator that sets grinding balls in motion which then grind the ground material through impact. Usually used for grinding liquid systems. The ground material suspension is fed continuously through the grinding chamber using a pump. Screens are usually used to separate the suspension and balls.

Antimicrobial coating

Coating that generates an antimicrobial effect on the glass surface with the help of silver compounds.

Antistatic coating

Coating with electrical conductivity that prevents electrostatic charging of the surface.

AR coating

Abbreviation for “anti-reflective coating”: method based on the interference of light to reduce reflection on glass surfaces. The remaining reflection level at the glass surface is less than 1%.

Borofloat

Colour-neutral borosilicate glass with high temperature and chemical stability produced in a floating process.

Ceramic pigment

Functional, non-metallic pigment, usually based on minerals, which is characterised by high thermal and mechanical resistance (e.g. aluminium oxide, spinels, carbides).

Clear glass

Float glass with low iron oxide content to avoid a "green tint" of the glass.

Conversion filter

Colour filters which can be used to modify the colour temperature of the light towards blue (colder) or red (warmer) or to carry out colour corrections (e.g. for product lighting).

CVD

Abbreviation for Chemical Vapour Deposition: Coating method where the layer-forming components form an oxide layer on the hot substrate directly from the gas phase.

Development of coating systems/ order development

Calculation and sample production of coating solutions and systems in the laboratory with the goal of meeting new customer-specific requirements.

Dichroic glass/ dichroic filter

Translucent glass with mineral-coated surface that causes interference of light. Certain wavelengths (colours) of light pass through and the remaining part of the range is reflected, i.e. not converted into heat through absorption. The definable colour effect of dichroic filter layers varies with the wave angle and the viewing angle of the observer.

Dip coating

Sol-gel coating method where the substrate is drawn out of the coating solution under constant conditions. Due to the effect of the air humidity, the sol becomes a gel, which is then transformed into a metal oxide via a tempering process.

The principle of dip-coating:

Dispersing technique

Technology for producing dispersions (heterogeneous mix of at least two insoluble substances where the dispersed phase is finely distributed in the dispersion medium).

Electrically conductive coating

Coating with a higher electrical conductivity, e.g. tin oxide or ITO, used for presenting an electrical panel heater on glass.

EMI shielding

Shielding of electromagnetic radiation due to electrically conductive coatings.

Float glass

High-quality, transparent flat glass manufactured using the so-called "floating process".

Flooding

Coating method where the coating solution runs over the substrate and creates a closed layer due to gravity.

Interference

Interaction of two light beams, where - depending on the relation between them - amplification or annihilation occurs.

Interference layer technology

Transparent thin layers with certain thickness and optical features are applied in a special sequence on a glass substrate. The reflected light fractions of the individual layers interfere with each other which leads to amplification or reduction of certain wavelength ranges - depending on the layer system design.

IR radiation

Abbreviation for infrared radiation (thermal radiation): the invisible radiation that heats up absorbing materials.

Planetary mill

Grinding system with closed grinding chamber in which the ground material is ground due to the high-energy impact of grinding balls. The grinding balls are located in a rotating container.

Powder technology

Synthesis and preparation of powders for the respective application technology.

Quartz glass / Silica glass

It consists of pure SiO2 and is characterised by a very low thermal expansion coefficient as well as high thermal and chemical resistance.

Resistance heater

Heat generation where an electrical current heats up the substrate evenly when flowing through an electrically conductive coating. (Application as panel heaters or on glass reactors).

Sol-gel dip coating

Method for producing thin layers on glass substrates. The glass is dipped into different solutions of organic metal compounds and drawn out at a defined speed. The film on the glass surface is transformed into adhesive metal oxide layers in the subsequent thermal process. By varying the materials, the number of layers and the layer thickness (depending on the drawing speed), it is possible to adjust the optical effects of the layer systems.

Spray pyrolysis

Coating method where a usually metal-organic coating solution is evaporated with a nozzle and then comes into contact with a hot surface as an aerosol. (Method for the deposition of closed oxide layers).

UV filter edge

Characteristic wavelength for the crossover from the exclusion range (ultraviolet) to the transmission range (longer wavelength) of the filter where the transmission is 50%.

UV, VIS and NIR range

Abbreviation for Ultra Violet range: 200-380 nm; VISible range VIS: 380-780 nm; Near (short wave) InfraRed NIR: 780-3000 nm.