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Place of Origin: China (Mainland)
Brand Name: M/N
Model Number: M/N glass
Material: glass
Size: customer request
color: clear

Specifications

Borosilicate Clear Glass

Physical data sheet


No.

Physics performance

Numerical Value

Unit

1

coefficient of mean linear thermal expansion(20oC;300 oC)

3.3±0.1

10-6 K-1

2

Transformation Temperature

525±15

oC

3

Softening point

820±10

oC

4

Working point

1260±20

oC

5

Density at 20oC

2.23±0.2

g/cm2

6

Mean thermal conductivity(20oC-100oC)

1.2

W/m.K

7

Refractive Index

0.92

l

Chemical Composition in approximate weight %( main components)


Item .

SiO2

B2O3

AL2O3

Na2O +K2O

%

81

13

2

3.08

                                                                           
Chemical Data:
Hydrolytic resistance at 98oC          ISO719-HGB 1
Hydrolytic resistance at 121oC         ISO720-HGB 1
water resistance                       Grade 1              Test method: ISO1776
Acid resistant Class                   Grade 1              Test method: ISO1776