Hf - Gelest Inc.

Gelest, Inc.
Melting
points of
refractory
materials
HAFNIUM
Hf
Atomic number
72
Atomic weight
178.49
CAS number
7440-58-6
Boiling point
4602°C
Melting point
2227°C
Specific gravity (20°C)
13.31
H 3 C
H 3 C
Cl Hf
H 3 C
H 3 C
(CH 3 ) 3 Si Cl
N Hf
(CH 3 ) 3 Si Cl
CH 3
CH 3
CH 3
Cl
CH 3
CH 3
CH 3
Si(CH 3 ) 3
N
Si(CH 3 ) 3
nC 4 H 9 O OnC 4 H 9
Hf
nC 4 H 9 O OnC 4 H 9
nC 4 H 9 O OnC 4 H 9
Hf
nC 4 H 9 O OnC 4 H 9
tC 4 H 9 O OtC 4 H 9
Hf
tC 4 H 9 O OtC 4 H 9
N(CH 2 CH 3 ) 2
(CH 3 CH 2 ) 2 N Hf N(CH 2 CH 3 ) 2
N(CH 2 CH 3 ) 2
name MW bp/mm (mp) D 4
20
n D
20
COMPOUNDS
Electrical resistivity (0°C)
29.6µΩ • cm
Enthalpy of melting
25.9kJ/mol
Enthalpy of vaporization
571kJ/mol
Ionization potential
(spectral)
7.0eV (I)
14.9eV (II)
(aqueous) 1.70V (+4)
Oxidation states
0, 4
Electronegativity, Pauling
1.3
Specific heat (25°C)
0.035 cal/g K
Thermal conductivity (25°C)
23.0w/m K
OMHF016
BIS(PENTAMETHYLCYCLOPENTADIENYL)- 519.86 (>300°)mp
HAFNIUM DICHLORIDE
C 20 H 30 Cl 2 Hf
HYDROLYTIC SENSITIVITY: 4 no reaction with water under neutral conditions
[85959-83-7] HMIS: 3-1-1-X 2.5g/$82.00 10g/$266.00
OMHF066
HAFNIUM BIS(HEXAMETHYLDISILAZIDE)- 570.17
DICHLORIDE
C 12 H 36 Cl 2 N 2 Si 4 Hf
employed in ALD of hafnium silicate 1 .
1. W. Nam et al, Electrochem. and Solid-State Lett., 7, C55, 2004
HYDROLYTIC SENSITIVITY: 8 reacts rapidly with moisture, water, protic solvents
[70969-29-8] HMIS: 3-2-1-X 10g/$120.00
AKH325
HAFNIUM n-BUTOXIDE, 95% 470.95 280-5°/0.01 1.32
C 16 H 36 O 4 Hf
contains

Gelest, Inc.
name MW bp/mm (mp) D 4
20
n D
20
CH 3
HC
CH 3
C
C
O
O
2
Hf
OnC 4 H 9
OnC 4 H 9
AKH328
HAFNIUM DI-n-BUTOXIDE (BIS-2,4- 522.58 1.07 1.4850 25
PENTANEDIONATE), 50% in toluene/n-butanol miscible: isopropanol
C 18 H 32 O 6 Hf
contains 2.5-3.0% hafnium tri n-butoxidepentanedionate analog
HYDROLYTIC SENSITIVITY: 7 reacts slowly with moisture/water
HMIS: 2-3-1-X
100g/$52.00
(CH 3 ) 2 N N(CH 3 ) 2
Hf
(CH 3 ) 2 N N(CH 3 ) 2
CH 3 CH 2 O OCH 2 CH 3
Hf
CH 3 CH 2 O OCH 2 CH 3
OMHF080
HAFNIUM DIMETHYLAMIDE 354.80 60-2°/0.1 1.40
C 8 H 24 N 4 Hf
(20°)mp
pale yellow solid
HYDROLYTIC SENSITIVITY: 8 reacts rapidly with moisture, water, protic solvents
[19962-11-9] HMIS: 3-3-1-X 5.0g/$146.00
AKH330
HAFNIUM ETHOXIDE 358.73 180-200°/13
C 8 H 20 O 4 Hf
(178-80°)mp
employed in preparation of refractory hafnia coatings 1 .
1. S. Sim et al in “Ultrastructure Processing of Advanced Ceramics, McKenzie, Wiley,
1988, p995.
HYDROLYTIC SENSITIVITY: 7 reacts slowly with water/moisture
[13428-80-3] HMIS: 2-2-1-X 5.0g/$44.00 25g/$176.00
C 2 H 5 C 2 H 5
C 4 H 9 CHCH 2 O OCH 2 CHC 4 H 9
Hf
C 4 H 9 CHCH 2 O OCH 2 CHC 4 H 9
H 3 C O H 2 C
C 2 H 5
H 3 C
H 3 C
C
CH 3
O
CH 2
H 3 C CH 3
C
O
O
Hf
O
C
H 3 C CH 3
CH 2
O
CH 3
C 2 H 5
CH 3
O C CH 2 O CH 3
CH 3
AKH332
HAFNIUM 2-ETHYLHEXOXIDE 678.40
TETRAOCTYLHAFNATE
C 32 H 68 O 4 Hf
HYDROLYTIC SENSITIVITY: 7 reacts slowly with moisture/water
HMIS: 2-2-1-X
25g/$50.00
AKH333
HAFNIUM 2-METHOXYMETHYL-2-PROPOXIDE 591.05 120°/1 1.303 1.4570
HAFNIUM MMP (MMP=METHOXY-t-BUTOXIDE)
(-5°)mp
C 20 H 44 O 8 Hf
flashpoint: 67°C (153°F)
employed in CVD of HfO 21
.
1. P. Williams et al, J. Mater. Chem., 12, 165, 2002
HYDROLYTIC SENSITIVITY: 7 reacts slowly with moisture/water
[309915-48-8] HMIS: 2-3-1-X 5.0g/$104.00
CH 3
C
HC
C
CH 3
I
I Hf
I
O
O
I
4
Hf
AKH335
HAFNIUM 2,4-PENTANEDIONATE 574.91 (82°/.001)sub
C 20 H 28 O 8 Hf
(193°)mp
HYDROLYTIC SENSITIVITY: 4 no reaction with water under neutral conditions
[17475-67-1] HMIS: 2-1-0-X 10g/$46.00 50g/$184.00
INHF070
HAFNIUM TETRAIODIDE 686.11 (400°)-sub
I 4 Hf
[13777-23-6] HMIS: 3-2-1-X 10g/$145.00
H 3 C C 2 H 5
N
C CH 2 H 5
3
N Hf N
H 3 C
N
C 2 H 5
C 2 H 5 CH 3
OMHF083
HAFNIUM TETRAKIS(ETHYLMETHYLAMIDE) 410.90 78°/0.01 1.324
C 12 H 32 N 4 Hf
flashpoint: 10°C(50°F)
HYDROLYTIC SENSITIVITY: 8 reacts rapidly with moisture, water, protic solvents
[352535-01-4] HMIS: 3-2-1-X 5.0g/$92.00 25g/$368.00
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Gelest, Inc.
name MW bp/mm (mp) D 4
20
n D
20
AKH345
(CH 3 ) 3 C
C
HC
C
(CH 3 ) 3 C
O
O
Hf
4
HAFNIUM TETRAMETHYLHEPTANE- 911.57 180°/0.1-sub
DIONATE
(315°)mp
C 44 H 76 O 8 Hf
soluble: toluene, hexane
HYDROLYTIC SENSITIVITY: 4 no reaction with water under neutral conditions
HMIS: 2-1-0-X
5.0g/$110.00
CF 3
HC
CH 3
C
C
O
O
Hf
4
AKH350
HAFNIUM TRIFLUOROPENTANEDIONATE 790.82 (115°/0.05)sub
C 20 H 16 O 8 F 12 Hf
(128-9°)mp
soluble: acetone, cyclohexane
HYDROLYTIC SENSITIVITY: 4 no reaction with water under neutral conditions
[17475-68-2] HMIS: 3-1-0-X 2.5g/$38.00
Cl
Hf
Cl
OMHF085
HAFNOCENE DICHLORIDE 379.59 (230-3°)mp
C 10 H 10 Cl 2 Hf
HYDROLYTIC SENSITIVITY: 7 reacts slowly with moisture/water
[12116-66-4] TSCA HMIS: 2-2-1-X 5.0g/$90.00
H 3 C
H 3 C
Cl
CH 3
CH 3
CH
Hf 3
Cl
Cl
OMHF050
PENTAMETHYLCYCLOPENTADIENYL- 420.08
HAFNIUM TRICHLORIDE
C 10 H 15 Cl 3 Hf
HYDROLYTIC SENSITIVITY: 8 reacts rapidly with moisture, water, protic solvents
[75181-08-7] HMIS: 3-2-1-X 1.0g/$80.00 5.0g/$320.00
CH 2
CH 2 Hf CH 2
CH 2
OMHF077
TETRABENZYLHAFNIUM 543.02
C 28 H 28 Hf
color: yellow
HYDROLYTIC SENSITIVITY: 8 reacts rapidly with moisture, water, protic solvents
[31406-67-4] HMIS: 3-1-1-X store