Structural and morphological study of mechanochemically synthesized crystalline nanoneedles of Zr-doped carbonated chlorapatite

• Main Authors: Nasiri-Tabrizi, B., Zalnezhad, E., Pingguan-Murphy, Belinda, Basirun, Wan Jefrey, Hamouda, A.M.S., Baradaran, S.
• Format: Article
• Language: English
• Published: Elsevier 2015
• Subjects: T Technology (General); TA Engineering (General). Civil engineering (General); TJ Mechanical engineering and machinery; TP Chemical technology
• Online Access: http://eprints.um.edu.my/15831/1/Structural_and_morphological_study_of_mechanochemically_synthesized_crystalline_nanoneedles.pdf; http://eprints.um.edu.my/15831/; http://www.sciencedirect.com/science/article/pii/S0167577X15003432
• Institution: Universiti Malaya

Nanosize Zr-doped carbonated chlorapatite (n-ZCCA) was developed as a novel bioceramic by a ball milling process. Results showed that the microstructural characteristics of the product were affected significantly by the degree of substitution and subsequent annealing at 800 degrees C for 1 h. In the absence of zirconium, mechanical activation for 3 h resulted in the formation of carbonated hydroxyapatite (CHA). With the addition of various amounts of zirconium, nanosize Zr-doped carbonated chlorhydroxyapatite (n-ZCCHA) and n-ZCCA were formed as a result of progressive mechanochemical reactions. From the HR-TEM images, the preferential substitution of Zr onto the ac or bc chlorapatite crystal facets (rich in calcium ions) led to a c-axis oriented crystal growth of crystalline nanoneedles with an average size of around 40-60 nm in length and 10-20 nm in width. (C) 2015 Elsevier B.V. All rights reserved.