Fabrication of dense biocompatible hydroxyapatite ceramics with high hardness using a peroxide-based route: A potential process for scaling up

• Main Authors: Randorn,C., Kanta,A., Yaemsunthorn,K., Rujijanakul,G.
• Format: Article
• Published: Elsevier Limited 2015
• Subjects: Surfaces, Coatings and Films; Materials Chemistry; Electronic, Optical and Magnetic Materials; Ceramics and Composites; Process Chemistry and Technology
• Online Access: http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84922722932&origin=inward; http://cmuir.cmu.ac.th/handle/6653943832/38883
• Institution: Chiang Mai University

© 2015 Elsevier Ltd and Techna Group S.r.l. In this research, nanosized hydroxyapatite (HA) ceramics with high hardness at moderate temperature were prepared using a novel peroxide-based route (PBR) using calcium nitrate, phosphoric acid and hydrogen peroxide as starting materials. Single-phase HA with an average particle size of approximately 10-30 nm and a BET surface area of 23.54 m2/g were obtained after calcination at 800 °C for 2 h. Dense HA ceramics with a density of 98%, a grain size of 0.91 μm and a Vickers hardness of 5.67 GPa were achieved after sintering the HA pellet at 1,200 °C. Their biocompatibility might be anticipated by SEM images of apatite layer formation after immersion in simulated body fluid (SBF) for 14 days.