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Effect of Co‐Precipitation on the Low‐Temperature Sintering of Biphasic Calcium Phosphate
Author(s) -
Jun YounKi,
Hong SeongHyeon,
Kong YoungMin
Publication year - 2006
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.1551-2916.2006.00977.x
Subject(s) - sintering , calcination , materials science , precipitation , phosphate , phase (matter) , calcium , chemical engineering , mineralogy , metallurgy , chemistry , organic chemistry , catalysis , physics , meteorology , engineering
Three types of biphasic calcium phosphate (BCP) powders were prepared and their sintering behavior was investigated. The specific surface area and HA/TCP ratio were similar in all three specimens. Most of the densification in the co‐precipitated s‐BCP occurred before the β‐ to α‐TCP phase transformation, and a maximum density of ∼95% was obtained at 1100°C. The mixture of separately precipitated and calcined hydroxyapatite (HA) and tricalcium phosphate (TCP) (m‐BCP) showed a poor sintering behavior, and the apparent density was below 70% at temperatures up to 1200°C. In the commercial HA and TCP mixture (c‐BCP), the low temperature sintering was poor, but densification continued without the phase transformation due to the presence of MgO, achieving almost full densification at 1200°C.