Biomedical Engineering Reference
In-Depth Information
α-Al
2
O
3
Aqueous
Anode: graphite
Cathode: Pt
Electrode
separation:
2 cm
Medium: H
2
O
Suspension pH: 10
pH adjustment: HNO
3
Dispersant: ester
polyphosphate (C213),
Darvan 821-A
5 wt.%
50-700
10
23-33
42
α-Al
2
O
3
0.6 μm
Nonaqueous
Anode: stainless
steel
Cathode:
stainless steel
Electrode
separation:
0.35 cm
Medium:
methylamylketone,
n
-butylamine, ethanol,
HNO
3
Suspension pH: 0.78
0.05-0.4
wt.%
150, 300
6
Thin
deposit
43
α-Al
2
O
3
1.4 μm
Nonaqueous
Anode: stainless
steel
Cathode:
stainless steel
Electrode
separation:
0.5 cm, 3 cm
Medium: ethanol
Suspension pH: 3
pH adjustment: glacial
acetic acid
Dispersant: citric acid
2.6, 15, 20
vol.%
1, 20
0.5, 5
44
α-Al
2
O
3
150 nm
Nonaqueous
Electrode
separation:
2 cm
Medium: ethanol
Suspension pH: 4, 7, 11
pH adjustment: glacial
acetic acid, tetramethyl
ammonium hydroxide
Dispersant:
polyethylene imine
20-70
vol.%
80
5
25
1250°C
2 h, air;
HIPed
b
180 MPa,
1250°C,
2 h, Ar
Full
density
with
solids
loading
of 50
vol.%
45
α-Al
2
O
3
0.15 nm
Aqueous
Interposing
membrane:
cellulose
Medium: H
2
O
Suspension pH: 7.5-9.0
Dispersant: Darvan C
25 wt.%
25
1200°C,
2 h, air;
HIPed
b
,
160 MPa,
1250°C,
2 h, Ar
46
α-Al
2
O
3
0.15 μm
Aqueous
Cathode: Pd
Electrode
separation:
2 cm
Medium: H
2
O
Suspension pH: 4
10 vol.%
25
1600°C,
2 h
Deposit
thickness:
150 μm,
alternating
layers, no
cracking,
47
(
continued
)
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