SOLAR

CONTROL

GLASS

Francesco Tritta

Guardian Luxguard I

History** Beginning 1960 Float glass

** During the 1960’s Body tinted glass

** Beginning of 1970 Pyrolitic coated glass

** End of 1970 ‘s Vacuum coated glass

** Beginning of the 1980’s Magnetron coating produced in Luxguard

** 1984 Low-e coating produced in Luxguard I

** End of the 1980’s Hifh performance coating produced in Luxguard I

** 2003 Biggest magnetron coater worldwide operating in Luxguard I

Properties of Glass Light

Light reflection

Light transmission

Properties of Glass Energy

Body tinted glass

Production Like float glass by changing raw materials

Colours Green, Blue, Bronze, Grey, Pink………

Use Automotiv / Decoration / Architectural

Properties

Light transmission :

90 % for clear

72 % for green

Solar factor :

85 % for clear

57 % for green

Solar absorption :

11 % for clear

52 % for green

Pyrolitic coated glassProcess

Spray process

600 °C

Producers Glaverbel Stopsol

VeglaAntelio

Pyrolitic coated glassProperties

Hard coating

One coating composed of metal oxide.

Not neutral

Limited performance

1 2 3 4

Position of coatingMost part of the time on position 1 coating exposed to external 1 = Outsideconditions 4 = Inside

Vacuum ProcessDiode Process

Gas

Cathode with target withoutpermanent magnet

Vacuum pump system

Metal atom

No permanent magnetNo homogeneous diffusing

Vacuum ProcessMagnetron Process

Argon

Cathode

Permanent magnet

Magnetic fields

Vacuum pumpsystem

Anode

Vacuum Process

Magnetron Process

Principle

The glass surface is coated by sputtering in vacuum where the targetmaterial on the cathode is diffused.

Diffusing is through positive loaded Argon ions.

Argon ions are produced in the plasma through the gas discharge.

Permanent magnets maintain the necessary density of the plasma.

Vacuum ProcessMagnetron Process

Cathode with target

Vacuum pumpsystem

Gas

Anode

Argon ion Metal particle Argon atom Argon electron Electron

Vacuum ProcessMagnetron Process

Magnetron solar control coatings

* Hard coating

• Coating applied on :• Clear float glass • Tempered or heat strengthened glass

* Possible to apply the coating in laminated glass against the PVB layer

Metal oxideMetal

Metal oxideMetalMetal oxide

Metal oxideMetalMetal oxide

Metal oxideMetalMetal oxide

Metal oxideMetalMetal oxide

Silver Pewter Bronze Blue Green CS CP CB CR CM

Magnetron solar control coatings

Vision

In the unit coating always in position #2.

Can be used in all traditional curtain wall systems , as well for structuralglazing systems, without stripping off the coating.

To improve the U-value in an unit with C-coating , a Low-e layer is necessary on surface #3.

Can be used as vertical and inclinated position.

1 2 3 4

Magnetron Low-e coating

Use Mainly in residential areas

In the unit coating always in position #2 or #3

Properties Thermal insulationReflexion of IR back inside

I.G. Unit clear I.G. Unit with Low-e coating

1 2 3 4

Magnetron Low-e coatingFunction of the different layers

Layer "1" : Metal oxideAdhesion of the next coming layerReduction of the light reflex ionGuarantee high light transmissionNeutral color

Layer "2" : SilverFunction layer (reflexion of the infrared radiation)Because of the pure silver the emissivity of the glass is decreased to lower than E=0,10 . This meansimprovement of the U-value. Non coated float glass has an emissivity of E=0,89.

Layer "3" : MetalProtection of the silver layer.

Layer "4" : Metal oxideReduction of the light reflexionProtection layer

Glass

12

34

High Performance Coating

PerformancesHigh light transmission

Low solar factor or shading coefficient

Low U-value

PropertiesCoating on surface #2 in the i.g. unit.

Neutral or colored.

1 2 3 4

High Performance Coating Coating Composition

Metal oxideMetalSilverMetal oxide

Blue 59 Silver 43 Natural 62 Neutral Plus 54 Silver 50 Neutral 52 Superneutral 63

Metal oxideMetalSilverMetal oxideMetalSilverMetal oxide