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Crystallized Glass Specifications                         home    back

ASTM of Crystallized Glass
Test  

 Standard

 

Result 

Specific Gravity  

 ASTM

 

 2.7

 Water Absorption 

 ASTM

 

 0.02%

 Flexural Strength (dry) 

 ASTM

 

 33 Mpa

 Coefficient of Friction (dry) 

 ASTM

 

 0.9

 Behavior in Fire 

DIN 4102

 

 A1

Product Properties

Cystallized Glass compared with Granite and Marble
 Properties       UnitCrystallized Glass       Marble            Granite     
 Specific Gravity 

 g/cm3

 

 2.7

 

2.5 

 

 2.7

 Compression Strength 

 Mpa

 

 400

 

 220

 

 295

 Rupture Strength 

 Mpa

 

 35

 

 15

 

 20

 Charpy Impact Strength 

 Kj/m2

 

 3.34

 

 1.9

 

 2.5

 Mohs' Hardness 

 

 

 6-6.5

 

 3-5

 

 5.5-6

 Water Absorption 

 %

 

 0.02

 

 0.3

 

 0.35

 Diffusion Reflectivity 

 %

 

 85

 

 55

 

 66

 Acid Resistance 

1%H2 OSO4,%

 

 0.08

  

 10.2

 

 1

 Alkali Resistance 

 1% NaOH, %

 

 0.05

 

0.3

 

 0.1

 Thermal Expansion Coefficient   

 X10-7/C

 

 25-400C 60

 

 80-260

 

50-150 

 Radioactivity  

 not exist

 

exist

 

exist

 

 

 


 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MOHS SCALE of MINERAL HARDNESS

Hardness

Substance or Mineral

1

Talc

2

Gypsum

2.5 to 3

pure Gold, Silver, Aluminum

3

Calcite, Copper penny

4

Fluorite

4 to 4.5

Platinum

4 to 5

Iron

5

Apatite

6

Orthoclase

6

Titanium

6.5

Iron pyrite

6 to 7

Glass, Vitreous pure silica

7

Quartz

7 to 7.5

Garnet

7 to 8

Hardened steel

8

Topaz

9

Corundum

9 to 9.5

Carborundum

10

Diamond

>10

Ultrahard Fullerite

>10

Aggregated diamond nanorods

Hardness  ↓

Mineral  ↓

Absolute Hardness  ↓

1

Talc

(Mg3Si4O10(OH)2)

1

2

Gypsum (CaSO4·2H2O)

2

3

Calcite (CaCO3)

9

4

Fluorite (CaF2)

21

5

Apatite

(Ca5(PO4)3(OH-,Cl-,F-))

48

6

Orthoclase Feldspar (KAlSi3O8)

72

7

Quartz (SiO2)

100

8

Topaz (Al2SiO4(OH-,F-)2)

200

9

Corundum (Al2O3)

400

10

Diamond (C)

1500