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Glass
Glass
8.2
Glass
Main Component
Silica or silicon dioxide.
Main Characteristics of Glass
Brittle
Chemically inert
Hard
Transparent
Heat insulator
Does not conduct electricity
Not permeable to gas and liquid
Type of Glass
Fused Silica Glass
Composition:
Silica
Properties:
High melting point
Does not expand or contract easily
Example:
Lens of telescope
Soda-Lime Glass
Composition:
Silica
Sodium carbonate
Calcium carbonate
Properties:
Low melting point
Easily shaped
Cannot withstand high temperature
Example:
Glass container
Borosilicate Glass
Composition:
Silica
Sodium carbonate
Calcium carbonate
Boron oxide
Aluminium oxide
Properties:
High melting point
Expands and contracts very little when there is temperature change
Can withstand high temperature and chemical reactions
Example:
Laboratory glassware
Lead Glass
Composition:
Silica
Sodium carbonate
Lead(II) oxide
Properties:
High refractive index
High density
Shiny
Example:
Prism
Glass
8.2
Glass
Main Component
Silica or silicon dioxide.
Main Characteristics of Glass
Brittle
Chemically inert
Hard
Transparent
Heat insulator
Does not conduct electricity
Not permeable to gas and liquid
Type of Glass
Fused Silica Glass
Composition:
Silica
Properties:
High melting point
Does not expand or contract easily
Example:
Lens of telescope
Soda-Lime Glass
Composition:
Silica
Sodium carbonate
Calcium carbonate
Properties:
Low melting point
Easily shaped
Cannot withstand high temperature
Example:
Glass container
Borosilicate Glass
Composition:
Silica
Sodium carbonate
Calcium carbonate
Boron oxide
Aluminium oxide
Properties:
High melting point
Expands and contracts very little when there is temperature change
Can withstand high temperature and chemical reactions
Example:
Laboratory glassware
Lead Glass
Composition:
Silica
Sodium carbonate
Lead(II) oxide
Properties:
High refractive index
High density
Shiny
Example:
Prism
Chapter : Manufactured Substances in Industry
Topic : Glass
Form 4
Chemistry
View all notes for Chemistry Form 4
Related notes
Ceramics
Composite Materials
Development in Chemistry Field
Scientific Investigation in Chemistry
Usage, Management and Handling of Apparatus and Materials
Basic Concept of Matter
The Development of the Atomic Model
Structure of the Atom
Isotopes and Their Uses
Relative Atomic Mass and Relative Molecular Mass
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