Chemical nature of glass 

Common solid silica (SiO2), sodium silicate (Na2Si03) and calcium silicate solution. Other types of coaches also have solid solutions of different silicates. The glass is a super-cooled liquid in the form of acrylic solids. Therefore, there is no crystalline structure of the coat. It does not have any definite melting point. There is no definitive chemical composition or formula in the glass, O compound. The average composition of normal glass is NO2SiO3CaSiO34Si02

Glass construction

 Raw materials:

The following substances are required in the manufacture of glass.

Acidic Oxides:

 Acidic Oxides: A variety of acidic oxides are used in the manufacture of glass. The oxide choice depends on the quality of the glass. Some main acidic oxides are
(i) Silica (SiO2): This is used as modified sand.
(ii) Boron trioxide (B203): It is used to make a high coat of low quality (low) in the form of boric acid or borax. It is used to make a coherent core (such as pyrex coaches).
(iii) Phosphorus Pentoxide (P205): It is used to make opalescent glass as calcium phosphate.

Basic Oxides:

(i) Sodium oxide (Na 2O): It is inserted as soda ash (Na2CO3) or sodium sulfate and carbon.
(ii) Potassium oxide (K2O): It is inserted as potassium carbonate.
 (ii) Calcium oxide (CaO): It is inserted as limestone (CaCO3).
(iv) Verium oxide (BaO): It is inserted as barium carbonate.
 (v) Lithium oxide (Li2O): It is inserted as lithium carbonate.
 (vi) Redhead (Pb304) or Litharge (PbO).
(vii) Zinc Oxide (ZnO).

Glass and type of glass

3. Coloring materials: 

To give color to the glass, the color compounds of metals are added in small quantities. The choice of color material depends on the desired color of the glass.
     Coloring glass colors 
 Cobalt oxide      -     dark blue
Sodium chromate or form oxide selenium oxide  - green
 Ferric salts or sodium current orange-red
 Gold like chloride or Cassius    -  purple-ruby
Qpras oxide                                -    red
 Cadmium sulfide cracked       -  yellow color (lemon JAMA)
 Peacock salts                              - Peacock blue

Annealing of Glass

 The glass gradually cools down in the annealing kiln. This action is called anchorage or cooling of the cork. After cooling down, the glass becomes brittle and easily.

 Types of Glass

There are several types of glass. Some main types of glass are:

1. Soft glass: Soft glass is a simple soda-lime coat. This glass softens smoothly at about 100 ° C temperature. It is used in window glass, jars, glass glasses, and sprouts, etc. House is made in glass utensils.

2.Hard glass: Hard glass is potash - lime glass (K2SiO3CaSiO3.4SiO2). This glass is soft with difficulty at about 800 ° C. It is used for use of beaker, test tube, flask, and high heat resistance The tool is in the making.

3.Flint glass: Flint glass potash - Lead silicate glass is used by it to make lenses of a prism or optical instruments.

4. Crookes glass: Rare Earth contains crude oxides of metals. It is used to make eyeglass lenses.

5.Pyrex glass: Purex glass is a mixture of mainly Rosicilates of sodium, potassium, and aluminum. In this, the percentages of silica and boric anhydride (B2O3) are also high. It is a high thermostat hardened glass. Its proportion coefficient is very low, so it does not break with the sudden change of heart. The pyrex glass is used to make high-quality equipment for laboratory

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