Chemical Name

& Synonyms

Soda-lime Silicate-Glass

Chemical Family

Silicate glass without free silica

Formula

SiO2

71-73%

Na2O

13-15%

MgO

3-5%

CaO

8-10%

Al2O3

0.5-2%

K2O

0.2-0.6%

Physical Properties

Boiling Point N/A

Vapour Pressure N/A

Percent Volatile by Volume Nil

Vapour Density N/A

Evaporation Rate N/A

Odour Nil

Refractive Index 1.52

Oil Absorption (ASTM) 17

Solubility in Water Not Soluble

Mohs 6

Absolute Specific Gravity(H2O=1)2.46

Knoop Load 100:515kg/mm2

Absolute Specific Gravity 1.6kg/dm3

Hardness DPH Load 50kg:540kg/mm2

Specific Heat Average 0.18kcal/mhoC

Dielectric Strength 4,500kv/cm

Dielectric Constant 7.2(1MC at 20oC)

Expansion Coefficient 8.5*10-6