*
*
*
*
*
*
|
* |
Properties
of Bomex Glass
*
Glass Code BJTY
Type Borosilicate
Color Clear
Principal Use General
Major Constituents
Approximate Weight %
Sio2 80.4
Al2O3 2.4
B2O3 13
BaO See below
CaO See below
Na2O 3.9
K2O See below
Trace Constituents max.
As2O3 + Sb2O3 0.01
PbO 0.1
MgO 0.1
ZnO 0.1
CaO 0.3
K2O 0.3
Bao 0.2 |
BJTY
Borosilicate
Clear
General
Weight %
80.4
2.4
13
See below
See below
3.9
See below
max.
0.01
0.1
0.1
0.1
0.3
0.3
0.2
|
PropertyLinear coefficient of expansion,
20 to 300 degrees C, cm/cm Cx10-7
Annealing point,
degrees C.
Softening point,
degrees C.
Density, annealed,
g/cm
Chemical durability,
Titration equivalentOf 0.01 M HC1/1g
of glass, max, ml |
*
32.0 + 1.5
560 + 10
820 + 10
2.23 + 0.02
*
*
0.1 |
*
Properties of GG17 Glass
GG17 Glass is a new special borosilicate glass of excellent chemical
and physical properties with a silica content of 80%. It is highly
stable in structure and, as a result, has marked mechanical strength and
very high resistance against chemical attacks. Furthermore, due to
its low linear coefficient of thermal expansion, this glass is capable
of withstanding high thermal shock and possesses good molding ability.
It is an excellent material for making intricate lamp-blown articles and
laboratory apparatus where external heating is necessary.
Principal Physical and Chemical
Properties
SIO2 Content
*
*
Strain Point
*
Softening Point
*
Annealing Point |
>80%
*
*
520 deg.C
*
820 deg.C
*
560 deg.C |
Linear Coefficient of Thermal Expansion
*
Acid Resistance
*
Alkali Resistance
*
Thermal Shock Resistance |
3.3 x 10-7K-1
*
*
Grade 1
*
Grade 2
*
300 deg. C |
*
*
Properties of “95” Glass
This is
a low alkali, high borosilicate content glass without calcium, magnesium,
zinc and lead elements. It possesses excellent chemical and physical
properties and is used for making various kinds of laboratory glassware.
*
Principal Physical and Chemical
Properties
SIO2 Content
*
*
Strain Point
*
Softening Point
*
Annealing Point |
>79%
*
*
520 deg.C
*
755 deg.C
*
540 deg.C |
Linear Coefficient of Thermal Expansion
*
Acid Resistance
*
Alkali Resistance
*
Thermal Shock Resistance |
3.9 x 10-6K-1
*
*
Grade 1
*
Grade 2
*
220 deg. C |
*
*
Properties of Neutral Glass
Neutral Glass is a kind
of glass with low borosilicate, sodium and calcium, which possesses excellent
chemical and physical properties and widely made for filtering flask, aspirator
and gas generators, etc.
Principal Physical and Chemical
Properties
SIO2 Content
*
*
Strain Point
*
Softening Point
*
Annealing Point |
>75.5%
*
*
520 deg.C
*
670 deg.C
*
510 deg.C |
Linear Coefficient of Thermal Expansion
*
Acid Resistance
*
Alkali Resistance
*
Thermal Shock Resistance |
7.5 x 10-6K-1
*
*
Grade 1
*
Grade 2
*
300 deg. C |
|
* |
