Form 4 Chemistry

FORM 4: CHEMISTRY GLASS AND CERAMIC

GLASS • Consists of slilicates • Most glass are tansparent, chemically inert,brittle and impermeable

Fused glass  Is

the simplest glass  It is mainly silica  It is highly heat-resistant glass.  Example: Laboratory apparatus.

So dium l ime g la ss  It is made by heating sand by lime stone  It can be melt at low temperature  It is easy to be shaped and has a good chemical probability  It is also has a high thermal coefficient

Borrosilicate glass • It was formed by adding boron side and soda-lime glass • It has lower thermal expension coefficient. • Three times more ressistant to chemical attacks

Lead crystal glass

Normally called crystal or lead glass It is optically transparent and contains much more lead

CERAMICS



Very hard,brittle,have a very high melting point, chemically inert and do not corrodes

Ceramics

 

They are made by from clay. They are good insulators of electricity and heat

THE END 

CREATED BY:NOR AMIRA JASMEN CLASS 4A SMKTMR 2009