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Synthesis and Sinterability of Hydroxyapatite from Fishery by-products
Wibisono, Yusuf,Dwijaksara, Ni Luh Bella,Widayatno, Wahyu Bambang,Wismogroho, Agus Sukarto,Amal, Muhamad Ikhlasul,Rochman, Nurul Taufiqu,Nishimura, Toshiyuki,Noviyanto, Alfian The Korean Ceramic Society 2018 한국세라믹학회지 Vol.55 No.6
Hydroxyapatites (HAps) were synthesized using the powdered waste of fishery products, i.e., fish scales and crab shells, as starting materials. HAp was synthesized by a wet-chemistry method followed by calcination at 600 and $800^{\circ}C$. Calcined crabshell powder revealed a single HAp phase and fine powder, while calcined fish-scale powder showed a ${\beta}-TCP$ secondary phase, even at the higher calcination temperature. Dense HAp pellets were obtained from the crab-shell powder by spark plasma sintering at $1000^{\circ}C$ for 10 min under applied pressures of 40 and 80 MPa in a vacuum state, giving sample densities of 2.93 and $3.06g/cm^3$, respectively. The estimated grain size of HAp was $448{\pm}96$ and $283{\pm}59nm$ for applied pressures of 40 and 80 MPa, respectively. In contrast, the HAp obtained using the pressureless sintering technique showed excessive grain growth without further densification.