Porous CaO-P2O5-SiO2 monolithics with double-pore structure were prepared from
tetraethoxysilane, triethylephosphate and calcium nitrate by a sol-gel method. Polyethylene glycol
and starch were used as mesopore-making agent and as macropore-making agent, respectively. The
porous monolithics, having mesopores with ~20 nm pore size and macropores with 7~20 μm pore
size, could be formed from the removal of organic components after heated at 600°C for 2 hours.
After soaked in simulated body fluid (SBF) at 37°C for 7 days, bonelike apatite was formed on the
surface of the samples. The porous samples were degraded gradually in SBF solution.
Double-pore structure porous Mo–Si–B intermetallics fabricated by elemental powder metallurgy method using NH4HCO3 as pore-forming agent