Synthesis of calcium chlorapatite nanoparticles and nanorods via a mechanically-induced solid-state displacement reaction and subsequent heat treatment. Issue 14 (1st October 2017)

• Record Type: Journal Article
• Authors: Pei, Lei; Tsuzuki, Takuya; Dodd, Aaron; Saunders, Martin
• Is Part Of: Ceramics international. Volume 43:Issue 14(2017)
• Page Start: 11410
• Page End: 11414
• Publication Date: 2017-10-01
• Subjects: Mechanochemical synthesis -- Nanopowder -- Chlorapatite; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.05.350
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A mechanically activated solid-state displacement reaction has been investigated as a means of manufacturing apatite nanoparticles. Mechanical milling and subsequent heat treatment of a CaCl2, Na3 PO4 and NaCl reactant mixture resulted in the formation of chlorapatite nanoparticles embedded within a solid salt matrix. The size and morphology of the chlorapatite nanoparticles was found to depend on the temperature of the post-milling heat treatment. A low temperature of 400 °C yielded largely equiaxed nanoparticles with an average diameter less than 100 nm. In contrast, heat treatment at 775 °C resulted in the formation of chlorapatite nanorods with an average diameter below 200 nm and a [001] growth direction. In both cases, removal of the salt matrix by washing with water gave powders with low levels of agglomeration.