Agc - As Aw Aq Glass Characteristics

Comparison of Glass Characteristics

Asahi Glass Company AS

AW

AQ

Soda Lime

White Crown

Synthetic Quartz 100

Chemical

SiO2

wt(%)

72.5

70.0

Composition

R2O3

wt(%)

2.0

0.5

RO

wt(%)

12.0

13.5

R2O

wt(%)

13.5

16.0

[10-7](50～200℃)

81

92

6 1,600

Thermal

Thermal Expansion Coefficient

Properties

Softening Point

(℃)

740

710

Transformation Point

(℃)

562

520

Strain Point

(℃)

511

505

1,000

nD

1.52

1.52

1.46

JIS R-3502

0.35

0.3-0.44

Optical Properties Refractive Index Chemical

Water Resistance

Properties

Acid Resistance

(mg/㎝2)

0

0

0.000

Alkali Resistance

(mg/㎝2)

0.04

0.06

0.03

Mechanical

Density

(g/cm3)

2.49

2.55

2.20

Properties

Young's Modulus

(kg/㎝2)

7,300

7,200

7,340

Knoop Microhardness

(kg/㎝2)

540

530

650

log(Ω･㎝) at 200℃

7.7

9.6

12.5

at 1MH,R.T.

7.5

7.1

4.0

Electrical

Bulk Resistivity

Properties

Dielectric Constant