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Biomimetic Preparation and Characterization of Bioactive Coatings on Alumina and Zirconia Ceramics
Author(s) -
Pribošič Irena,
Klopčič Sabina Beranič,
Kosmač Tomaž
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03397.x
Subject(s) - materials science , octacalcium phosphate , crystallinity , cubic zirconia , coating , apatite , chemical engineering , simulated body fluid , ceramic , supersaturation , scanning electron microscope , precipitation , transmission electron microscopy , energy dispersive x ray spectroscopy , composite material , nanotechnology , calcium , metallurgy , chemistry , organic chemistry , physics , meteorology , engineering
For the preparation of bioactive coatings on alumina and zirconia ceramic surfaces a fast biomimetic method using a supersaturated solution containing Na + , Ca 2+ , Cl − , HCO 3 − , and PO 4 3− ions was used. The coatings were analysed with the use of an X‐ray diffraction spectrometer and a transmission electron microscope equipped with an energy‐dispersive spectroscopy detector. After the precipitation both coatings were composed of poorly crystallized, nanosized, plate‐like particles with the octacalcium phosphate (OCP) crystal structure. The adhesion of the coatings was improved by a heat treatment at 1050°C for 1 h. During this heat treatment the calcium phosphate layer, deposited from a supersaturated solution onto the surface of the substrates, was sintered to form a dense coating. At the same time the OCP crystal structure was transformed into that of hydroxyl apatite, the coating's crystallinity was increased, and the particles grew isotropically up to 300 nm in size. The bioactivity of the coated ceramic was confirmed before and after the heat treatment using a simple simulated body fluid test.