2.5

Fluoride Glasses

2.5.1

Fluorozirconate Glasses

Fluorozirconate Glass Compositions

Composition (mol %)

Glass

ZrF4

BaF2

GdF3

LaF3

YF3

AlF3

ThF4

LiF

NaF

ZBL

62

33

–

5

–

–

–

–

–

ZBG

63

33

4

–

–

–

–

–

–

ZBGA

61

32

4

–

–

3

–

–

–

ZBT

60

33

–

–

–

–

7

–

–

ZTL

60

7

–

23

–

–

ZBAN

58

15

6

21

ZBLA

57

34

–

5

–

4

–

–

–

ZBGA

60

32

4

–

–

4

–

–

–

ZBLAL

52

20

–

5

–

3

–

20

–

ZBLYAL

49

22

–

3

3

3

–

20

–

ZBLAN

56

14

–

6

–

4

–

–

20

Glass

Transmission

Refractive

Abbe

dn/dT (10−6/K)

type

range (µm)

index nD

number νd

435.8 nm

1060 nm

ZBL

0.25–7.0

1.523

–

–

–

ZBT

0.32–6.8

1.53

–

–

–

ZBLA

0.29–7.0

1.521

62

–

–

ZBLAN

0.25–6.9

1.480

64

−14.5 (633 nm)

–

Glass

Density

Young’s

Poisson’s

Hardness

Stress-optical

type

(g/cm3)

modulus E

ratio µ

(Knoop)

coeff. K (TPa) −1

ZBL

4.78

60

0.31

228

–

ZBT

4.8

60

0.28

250

–

ZBLA

4.61

60.2

0.25

235

–

ZBLAN

4.52

60

0.31

225

–

Thermal

Thermal

Specific

Transformation

Softening

Glass

expansion

conductivity

heat

temperature

temperature

type

( 10−6/K)

(W/m K)

( J/g K)

(K)

(K)

ZBL

18.8

–

0.538

580

–

ZBT

4.3

–

0.511

568

723

ZBLA

18.7

–

0.534

588

–

ZBLAN

17.5

0.4

0.520

543

–

Glass

HfF4

BaF2

LaF3

AlF3

ThF4

HBL

62

33

5

–

–

HBT

60

33

–

–

7

HBLA

58

33

5

4

–

Glass

Transmission

Refractive

Abbe

dn/dT (10−6/K)

type

range (µm)

index nD

number νd

435.8 nm

1060 nm

HBL

0.25–7.3

1.498

–

–

–

HBT

0.22–7.7

1.53

–

–

–

HBLA

0.29–7.3

1.504

–

–

–

Glass

Density

Young’s

Poisson’s

Hardness

Stress-optical

type

(g/cm3)

modulus E

ratio µ

(Knoop)

coeff. K (TPa) −1

HBL

5.78

55

0.3

228

–

HBT

6.2

55

0.3

250

–

HBLA

5.88

56

0.3

240

–

Glass

Thermal

Thermal

Specific

Transformation

Softening

expansion

conductivity

heat

temperature

temperature

type

(10−6/K)

(W/m K)

( J/g K)

(K)

(K)

HBL

18.3

–

0.413

605

–

HBT

6.0

–

0.428

593

–

HBLA

17.3

–

0.414

580

–

Composition (mol %)

Glass

BeF2

MgF2

CaF2

BaF2

AlF3

LiF

KF

BF

100

–

–

–

–

–

–

BLK

60

–

–

–

–

20

20

BACK

49

–

14

–

10

–

27

BAMCBa

35

19

10

14

22

–

–

Density

Refractive

Nonlinear

Abbe

Hardness

Glass

(g/cm3)

index nD

index (m2/W)

number

(kg/mm2)

BF

2.122

1.275

0.75

105

300

BACK

2.621

1.3459

1.03

96

215

BAMCBa

3.247

1.3538

1.14 (calc.)

~95

315

Composition (mol %)

Glass

BaF3

InF3

GaF3

ZnF2

YbF3

ThF4

ZrF4

BIZnYbT

30

30

–

20

10

10

–

BlG

30

18

12

20

10

6

4

Composition (mol %)

AlF3

BaF2

CaF2

YF3

SrF2

MgF2

CdF2

LiF

NaF

ZrF4

PbF2

YABC

40

20

20

20

–

–

–

–

–

–

–

CLAP

30.6

–

–

–

–

–

26.1

10

–

–

33.3

ABC

30.2

9.9

19.2

8.3

12.4

3.5

–

–

3.8

10.2

2.5