contact now
download
e-brochure
PHYSICAL PROPERTIES
CHEMICAL PROPERTIES

Physical Properties:


Characteristic

Unit

Muscovite

Phlogopite

Colour   Ruby / Green Amber / Yellow
Density gm/cm3 2.6 - 3.2 2.6 - 3.2
lb/ln3 0.095-0.116 0.095-0.116
Specific Heat   0.21 0.21
Hardness Moh Scale 2.8 - 3.2 2.3 - 3.0
Shore Test 80 - 105 70 - 100
Optic Axial Angle   55 - 75 5 - 25
Tensile Strength kgf/cm2 about 1750 about 1000
lbf/in2 about 25000 about 15000
Shear Strength kgf/cm2 2200 - 2700 1000 - 1300
lbf/in2 31000 - 38000 14000 - 19000
Compression Strength kgf/cm2 1900 - 2850 ---
lbf/in2 27000 - 32000 ---
Modulus of Elasticity kgf/cm2 x 10-3 1400 - 2100 1400 - 2100
lbf/in2 X 10-6 20 - 30 20 -30
Coefficient of expansion per °C perpendicular to cleavage plane 9 X 10-6 - 36 X 10-6 30 X 10-6 - 60 X 10-6
Calcining Temperature ° C 700 - 800 900 - 1000
° F 1290 - 1470 1650 -1830
Maximum operating temperature ° C 500 - 600 800 - 900
° F 930 - 1110 1470 -1650

Thermal conductivity

     
Perpendicular to cleavage planes Gm.cal/sec/cm2/ °C/cm about 0.0013 about 0.0001
BTU/hr/ft2/°F/ft about 0.31 about 0.24
Parallel to cleavage planes Gm.cal/sec/cm2/ °C/cm   about 0.012
BTU/hr/ft2/°F/ft   about 3.0
Percentage of water constitution   4.5 3.0
Moisture absorption   Very low Very low
Apparent electric strength 0.001" to 0.003" KV/mm 120 - 200 ---
Thick Volts per 0.001" 3000 - 5000 ---
R.M.S. at 15° C (60° F) 0.01" to 0.05" KV/mm 40 - 80 30 -60
thick Volts per 0.001" 1000 - 2000 750 -1500
Permittivity at 15 °C (60 °F)   6-7 5-6
Power Factor (loss tangent) @ 15 °C (60 °F) 0.0001 - 0.0004 0.001 - 0.005
Volume Resistivity 25 °C (77 °F) ohm cm 40 x 1013 - 2 x 1017 1 x 1012 - 1 x 1012
Acid reaction   Affected by Hydrofluoric Acid Affected by Sulphuric Acid

Chemical Properties:


Silica (SiO2) 45.57%
Alumina (Al2O3) 33.10%
Potassium Oxide (K2O) 9.87%
Ferric Oxide (Fe2O3) 2.48%
Sodium Oxide (Na2O) 0.62%
Titanium Oxide (TiO2) Traces
Calcium Oxide (CaO) 0.21%
Magnesia (MgO) 0.38%
Moisture at 100°C 0.25%
Phosphorus (P) 0.03%
Sulphur (S) 0.01%
Graphite Carbon (C) 0.44%
Loss on Ignition (H2O) 2.74%
ball pens Manufacturer India,gel pens Manufacturer India,direct fill pens Manufacturer India,pen refills Manufacturer India,sketch pens Manufacturer India ball pens Manufacturer India gel pens Manufacturer India direct fill pens Manufacturer India pen refills Manufacturer India sketch pens Manufacturer India