PROPERTIES OF GLASS
Laboratory
glassware from our company are manufactured of different special glass of high
quality according to different requirements of the various items. The general
characteristics as well as the principal physical and chemical properties of
these glass are described as follows:
I.GG17 GLASS (Boro
3.3 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 cable of withstanding high thermal shock and possesses
good moulding 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
|
>80%
|
Linear Coefficient of Thermal Expansion
|
3.3x10-6K-1
|
Strain Point
|
520℃
|
Acid Resistance
|
Grade 1
|
Softening Point
|
820℃
|
Alkali Resistance
|
Grade 2
|
Annealing Point
|
560℃
|
Thermal Shock Resistance
|
300℃ |
II NEUTRAL
GLASS(Including Amber Glass)
Neutral Glass is a
kind of glass with low borosilicate, Sodium calcium, which possesses excellent
chemical and physical properties widely made for filtering flask, aspirator and
gas generator volumetric glasswares, Desiccators, bell jars, reagent bottles,
specimen jars etc.
SiO2
|
75
|
Softening Point
|
740℃
|
Density
|
2.40g/cm3
|
Resistance to Water
|
HGB1
|
Strain Point
|
510℃
|
Linear Coefficient of Expansion α
|
8.0x10-6K-1
|
Annealing Point
|
550℃
|
|