Hydroxyapatite (HA), which is an important calcium phosphate mineral, has been applied in orthopedics, dentistry, and many other fields depending upon its morphology. HA can be synthesized with different morphologies through controlling the synthesis method and several parameters. Here, we synthesize various morphologies of HA using two simple methods: hydrothermal combustion and solution combustion. The phase purity of the synthesized HA is confirmed using X-ray diffractometry. It demonstrates that pure phased hydroxyapatite can be synthesized using both methods. The morphology of the synthesized powder is examined using scanning electron microscopy. The effects of pH and temperature on the final powder are also investigated. At 140 oC, using the hydrothermal method, nano-micro HA rods with a hexagonal crystal structure can be synthesized, whereas using solution combustion method at 600 oC, a dense cubic morphology can be synthesized, which exhibits monoclinic crystal structures.

• Sachin N Bramhe(Department of Material Science and Engineering, Pai Chai University, Center for New Functional Materials Metrology, Korea Research Institute of Standards and Science)
• Hyun Chul Lee(Department of Material Science and Engineering, Pai Chai University)
• Min Cheol Chu(Center for New Functional Materials Metrology, Korea Research Institute of Standards and Science)
• Jae-Kyung Ryu(Department of Dental Technology and Science, Shinhan University)
• Avinash Balakrishnan(Nanosolar Division, Amrita Centre for Nanosciences, India)
• Taik Nam Kim(Department of Material Science and Engineering, Pai Chai University) Corresponding author