Some Important Chemical Compounds

SOME IMPORTANT CHEMICAL COMPOUNDS


Custom Search




TYPES OF GLASS



       We know that glass is used for making many articles, but we cannot use same type of glass for making everything. This means that we need different types of glass for different purposes. These types of glass can be made by changing the chemical composition of ordinary glass.

       Now we will study different types of glass, their chemical composition and there uses.

1. Soda Glass or Soft Glass or Ordinary Glass

       Soda glass is the cheapest and most commonly used glass. It is made by fusing a mixture of sodium carbonate, calcium carbonate and silica. It is called soda glass because it is prepared from soda ash or sodium carbonate. It is called soft glass because it becomes soft after heating.

Uses:- Soda glass is used for making glass tumblers, mirrors, window panes, electric bulbs, bottles, and dishes etc.

soda glass is prepared from soda ash or sodium carbonate


2. Potash Glass or Hard Glass

       It is prepared by fusing a mixture of potassium carbonate, calcium carbonate and silica. As its name indicates it is very hard and have high melting point. It is also more resistant to action of acids.

Uses:- Hard glass is used for making hard glass laboratory apparatus.

Potash Glass or Hard Glass


3. Optical Glass

       It is prepared by fusing potassium carbonate, lead oxide and silica.

Uses:- It is used for making lenses which are used in spectacles, cameras, microscopes, telescopes and other optical instruments. It is also used for making glass prisms.

Optical Glass


4. Pyrex Glass or Borosilicate Glass

       It is made by fusing a mixture of sodium carbonate, potassium carbonate, calcium carbonate, silica, borax and aluminium oxide.

Uses:- It is used for making laboratory apparatus such as flasks, and beakers because it can withstand high temperature while heating without breaking. It is also used for making ampoules which are used for storing the medicines for injections. In our homes the utensils which are used in microwave ovens are made up of Pyrex glass.

Pyrex Glass or Borosilicate Glass


5. Safety Glass

       It is prepared by sandwiching a thin sheet of plastic between two layers of glass by applying suitable adhesive on both the sides. These three layers are then joined together by the action of pressure and heat to form a single sheet of safety glass. This glass is very strong. It cannot be broken into small pieces by hitting with heavy objects. That is why it is called safety glass.

Uses:- It is used mainly for making the windscreens of automobiles, trains and aeroplanes. It is also used for making bullet-proof jackets.

Safety Glass


6. Photo Chromatic Glass

       This glass has a unique property of becoming dark coloured when exposed to bright sunlight and coming back to original state when bright sunlight is removed. This happens due to the presence of a layer of silver bromide over it.

Uses:- This glass is used for making spectacles, cameras and goggles.

Photo Chromatic Glass


7. Lead Crystal Glass

       It is made by fusing a mixture of potassium carbonate, lead oxide and silica.

Uses:- This glass has the property of shining so it is used for making expensive glass products.

Lead Crystal Glass


8. Coloured Glass

       Coloured glass is made by mixing small amount of colouring materials such as certain metal oxides during the preparation of glass. For example

S No. Name of the metal oxide Colour imparted to the glass
1. Iron oxide Brown
2. Cobalt oxide Blue
3. Copper oxide Red


Coloured Glass



Glass Fibers

       Glass fibers are fibers which are used in various applications in industries. These are obtained by forcing molten glass through very fine holes under high pressure. It is used in two forms:

  1. Glass wool

  2. Optical fibers


1. Glass wool

       Glass wool is a mass of loose glass fibers. Glass wool is an excellent insulator that is why it is used as an insulation material in refrigerators, electric ovens etc. Glass wool is also used for making fire proofing clothing.

Glass wool is a mass of loose glass fibers

2. Optical Fibers

       The optical fibers are thin and long glass fibers which transmit signals in the form of light through the process of total internal reflection. These days’ optical fibers are being used extensively in examining the internal parts of human body by a technique called as ‘endoscopy’. These also help in conducting surgical operations. Optical fibers are also being used in telecommunication like telephones.

The optical fibers are thin and long glass fibers which transmit signals in the form of light through the process of total internal reflectionThe optical fibers are thin and long glass fibers which transmit signals in the form of light through the process of total internal reflection




Test Your Understanding and Answer These Questions:






Developers of Fun Science
Rajan Gupta Rajan Gupta
M.Sc, B.Ed. & LL.B.
Teacher, Author & Innovator
Rahul Jindal
B.Tech
Entrepreneur & Innovator
Rahul Jindal

Share your comments / feedback here.
Fun Science