Hydroxyapatite and Other Biomedical Coatings by Electrophoretic Deposition - Biological and Biomedical Coatings: Processing and Characterization - page 102

TABLE 3.3 (Continued)
Summary of Reported Work on Aqueous and Organic Electrophoretic Deposition of Other Bioceramics

Particle
Size

Medium
Type

Solids
Loading

Voltage
(V)

Time
(min)

Temp.
(°C)

Heat
Treatment

Deposit
Properties

Coating Substrate SuspensionMedium Reference

SiO 2 Nonaqueous Anode: Al

Cathode:
stainless steel
Electrode
separation: 1 cm

Medium: acetone 10-100 1-5 25 72

3.2 μm

SiO 2 Nonaqueous Working

electrode: Al
Cathode:
stainless steel
Electrode
separation:
0.5 cm

Medium: acetone 3-10 g/L 10-200 1-10 25 Calcined

300°C,
8 h

Deposit
thickness:
100 μm

73

12 μm

TiO 2 (Rutile) 0.48 μm Aqueous Anode: stainless

steel
Cathode:
stainless steel
Electrode
separation: 1 cm

Medium: H 2 O
pH adjustment:
titanium
tetraisopropoxide,
lactic acid

20 vol.% 15 25 1000°C,

2 h

74

TiO 2 (Rutile) 30 nm Aqueous Anode: stainless

steel
Cathode: Pd
Electrode
separation:
2 cm

Medium: H 2 O
pH adjustment: HCl and
ammonia solution
Dispersant:
polyethylenimine

5 vol.% 25 75

TiO 2 (Rutile) 0.4 μm Aqueous Anode: alumina

coated with
100 nm layer of
Au 80%/Pd
20%
Cathode:
alumina coated
with 100 nm
layer of Au
80%/Pd 20%
Electrode
separation:
2 cm

Medium: H 2 O
Suspension pH: 10
pH adjustment: nitric
acid
Dispersant:
tetraethylammonium
hydroxide, sodium salt
of polymethacrylic
acid, Tiron
Cosolvent: ethanol

5-20 vol.% 10 25 Deposit

thickness:
0.5 μm -
5 mm

76