borosilicate glass 3.3

1). Mechanical Performance

Density p

2.23+-0.02g/cm3

2). Thermodynamic Performance

Thermal expansion coefficient

(0-300) 3.3+-0.1x10-6K-1

Softening point

820+-10

Strain point

516+-10

Caloricity

(20-100) 0.82KJ x (kgxK)-1

Thermal coefficient

1.2WxmxK-1

Thermal shock resistance

180K

Strengthening type

300K

Identical temperature difference

100K

Strengthening type

300 K

Maximum working temperature Short time(<10h):

500

Long time(>10h):

450

3). Chemical Performance

Water resistance

ISO719/DIN12111 HGB1/ISO720 HGA1

Acid resistance

ISO1776/DIN12116 1

Alkali resistance

ISO695/DIN52322 A2

4). Optical Property

Refractive index Nd:

1.47384

Transmittance spectrum curve

5). Electrical Property

Specific resistance lgp

8.0xcm at 250

Dielectric dissipation fraction tan  (1 megacycle at 20):

38x10-4

Dielectric constant

4.7