Table 1.
Physicochemical properties of CaP particles.
| CaP particles | chemical formula | Ca/P | pHa | density (g cm−3) | crystal formb |
|---|---|---|---|---|---|
| u-HA | Ca10(PO4)6(OH)2 | 1.67 | 6.90 | 2.70 | hexagonal columnar |
| α-TCP | Ca3(PO4)2 | 1.50 | 8.72 | 2.87 | spheroid |
| β-TCP | Ca3(PO4)2 | 1.50 | 9.41 | 3.07 | spheroid |
| TeCP | Ca4(PO4)2·O | 2.00 | 11.60 | 3.37 | spheroid |
| DCPA | CaHPO4 | 1.00 | 6.88 | 2.37 | lamellar |
| DCPD | CaHPO4·2H2O | 1.00 | 6.53 | 2.92 | lamellar |
| OCP | Ca8H2(PO4)6·5H2O | 1.33 | 6.64 | 2.67 | lamellar |
a
pH values of particulate bioceramics in 10% aqueous solution were measured using a pH metre at 25 °C.
b
Any CaP particle that formed secondary aggregations was grounded into particles (average size 3–5 μm) using a wet batch-type grinder (BSG-1/4G; Aimex Co., Ltd).