Design Technology - Topic 4.2c

Glass

Solid made by rapidly cooling a mixture of silica, soda, and lime. Transparent, inert, and sustainable with increased thermal insulation, compressive strength, and hardness. Decreased tensile/impact strengthBo

Color of Glass

Can be modified by adding metallic oxides that vary in amount and type

Soda Glass

Commercial glass that is the most commonly used. Medium-low thermal shock

Borosilicate (Pyrex)

Soda glass that has been altered using oxides to increase thermal conductivity

Toughened

Glass that has been heated to its melting point and then blasted with cold air. Increased brittleness

Laminated

Layers of glass with plastic sheets between them. When impacted, the glass fragments are held in place, preventing cracks from growing

Fiberglass

Very long strands of glass that can be woven into mats or used to reinforce plastics

Cullet

Recycled glass that is added to new raw materials to make new glass