Glass

Tempered glass is used for its strength and safety in a variety of applications, such as architectural glass, vehicle windows, shower and refrigerators doors, mobile phone screen protectors and others.

In the tempering process, annealed glass is placed onto a roller table and taken through a furnace that rapidly heats the glass to about 700°C and then quickly cools it with forced air drafts.

The fine crystal structure, the very high resistance to thermal shock due to its near to zero thermal expansion, the resistance to corrosion and the decades of experience in its production make Morgan’s fused silica rollers the best material for transport rollers for this application.

Our fused silica rollers are available in lengths of over 4 meters.

Versus other precision glass mould materials such as silicon, cemented tungsten carbide, nickel alloys, or glassy carbons, CVD silicon carbide is the only material that provides the combination of high hardness (for long tool life), high stiffness, and high thermal conductivity, high thermal capability, and thermal cycle resistance making it an ideal candidate for moulding aspheric glass lenses.

Also, the low thermal expansion coefficient (CTE) of CVD SiC is an excellent match for low-Tg optical glasses. This reduces the potential of glass lens breakage due to CTE mismatches between the glass and tool. CVD SiC surfaces can also be polished to a mirror-like surface finish to minimise imperfections on the moulded lens.