M.A. Irfa’i, A. Prihanto, S. Muryanto, R. Ismail, J. Jamari, A.P. Bayuseno
Bovine bone is a natural resource having valuable calcium phosphate compounds as a potential bioceramics powder feedstock. This study manipulated the calcium phosphates via hydrothermal processes after calcium phosphate-containing bone was calcined and extracted. Here the resulting powder precursors obtained after calcining at 900 °C for 5 hours were hydrothermally processed for varying times at 110°C (1–5 h), yielding mainly biphasic calcium phosphates (β-tricalcium phosphate and hydroxyapatite) formation with a minute lime according to XRD analysis. Calcination and hydrothermal processing can effectively produce a high amount of hydroxyapatite proportion (> 99 wt.%) with nano crystallite sizes (30-50 nm). After 5-hour calcination, the SEM images revealed the powder product with size uniformity (1 µm) and plate-like morphology. The powdered bovine bone was then subjected to DTA, DTG, and TG analyses to determine its thermal behavior. Calcination temperatures from 300 to 600O C removed organic compounds and other impurities from powder matrices. Instead, the calcination of bovine bone at temperatures from 800 to 1000O C supported the result of the stabilized microstructure of calcium-phosphate-bearing minerals, which would make valuable powder feedstock for hydrothermal synthesis. Results of the study demonstrated that simple calcination and subsequent hydrothermal processing of bovine bone providing major hydroxyapatite and minor β-tricalcium phosphate would get a depth insight into calcium phosphate resource recovery and recycling. © 2023, Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma. All rights reserved.
Department of Mechanical Engineering, Diponegoro University, Semarang, 50275, Indonesia; Department of Mechanical Engineering, Universitas Negeri Surabaya, Surabaya, 60231, Indonesia; Chemical Engineering Vocational Program, Catholic Polytechnic Mangun Wijaya, Semarang, 50133, Indonesia; Department of Chemical Engineering, UNTAG University, Semarang, 50235, Indonesia
