Effect of temperature on morphology of electrochemically-deposited calcium phosphates.
Calcium phosphates were electrochemically deposited on titanium plates at temperatures from 4 degrees C to 92 degrees C in a solution of NaCl, K2HPO4 and CaCl2 x 2H20. Scanning electron microscopic studies showed that granular deposits formed on the electrode at electrolyte temperatures of 4 degrees C, 22 degrees C, and 37 degrees C; needle-like deposits formed at 52 degrees C-92 degrees C. The width and length of the needles increased with the temperature of the electrolyte. Based on the results of characterization by electron diffractometry. Fourier transform infrared spectroscopy and X-ray diffractometry, the granular deposits were identified as carbonate-containing calcium phosphate with low crystallinity, and the needle-like deposits as carbonate-containing apatite crystals elongated along the c-axis. Crystallinity of the deposits increased with the temperature of the electrolyte, whereas the orientation indices of the apatite increased with temperature up to 82 degrees C and slightly decreased at 92 degrees C.
Ban
S
S
Department of Dental Material Science, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan.
Maruno
S
S
Harada
A
A
Hattori
M
M
Narita
K
K
Hasegawa
J
J
D001031:Apatites / Q000737:chemistry; D002130:Calcium Phosphates / Q000737:chemistry*; D002254:Carbonates; D003460:Crystallization; D018360:Crystallography, X-Ray; D004563:Electrochemistry; D004595:Electroplating; D008855:Microscopy, Electron, Scanning; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014025:Titanium
D001031:Apatites; D002130:Calcium Phosphates; D002254:Carbonates; D014025:Titanium