Hydroxyapatite and Other Biomedical Coatings by Electrophoretic Deposition - Biological and Biomedical Coatings: Processing and Characterization - page 110

TABLE 3.5 (Continued)
Summary of Reported Work on Electrophoretic Deposition on Insulating Substrates

Processing
Parameters MaterialandSuspension Electrodes Remarks Ref.

Material: Y-ZrO 2 (YSZ A ),
0.3 μ m
Solids loading: 2.5-20 g/L
Suspension medium:
acetyl acetone, acetone,
ethanol, mixture of
acetone and ethanol (3:1)
Dispersant: iodine

Anode: Pt
Cathode: Porous La 0.85 Sr 0.15 MnO 3
(LSM), LSM-YSZ composite

Voltage: 5-40 V
Time: 3-30 min
Electrode separation: 1.5 cm
Stirring during process: yes

• Dense, pore-free, crack-free deposits on LSM and
LSM-YSZ obtained by controlling parameters
(sintering temperature, heating rate)
• Optimal deposition time 8 min
• Deposit thickness ~10 μm
• Optimal solids loading 9 g/L (<5g/L gave low
deposition rate)
• Iodine increased electrical conductivity in 3:1
acetone:ethanol
• Best quality suspensions and deposits were from
acetone:ethanol

94

Material: wollastonite,
3 μ m
Solids loading: 0.5 g/mL
Suspension medium:
acetone
Dispersant: iodine

Anode: Au
Interposing membrane: porous
alumina (10 μ m pore size)
Cathode: Au

Voltage: 1,000 V
Time: 1 min
Electrode separation: 30 mm
Stirring during process: no

• Wollasonite penetration of pores
• Apatite formed after soaking in simulated body
luid

95

a YSZ, Yttria partially stabilized zirconia.