TY - JOUR ID - 87496 TI - A New Mixture of Nano-structure of Potassium-incorporated Hydroxyapatite/β-tricalcium Phosphate/calcium Pyrophosphate JO - Inorganic Chemistry Research JA - J10.22036 LA - en SN - AU - Chahkandi, Mohammad AU - Chahkandi, Behzad AD - Department of Chemistry, Hakim Sabzevari University, Sabzevar 96179-76487, Iran. AD - Department of Chemistry, Shahrood Branch, Islamic Azad University, Shahrood, Iran Y1 - 2019 PY - 2019 VL - 3 IS - 1 SP - 6 EP - 15 KW - Potassium-substituted hydroxyapatite/β-TCP/CPP KW - Nano-particles KW - Sol-Gel DO - 10.22036/icr.2018.102753.1040 N2 - The new triphasic potassium−substituted hydroxyapatite (KHAP), β−tricalcium phosphate (β−TCP), and calcium pyrophosphate (CPP) proportions using easy sol−gel method were synthesized. The prepared powders was characterized by X–ray diffraction (XRD), Fourier transform infrared (FTIR), Differential thermal behavior (DTA) analysis, Energy Dispersive X–ray Analysis (EDXA), and Brunauer–Emmett–Teller (BET). In addition, the size of nano particle and micro–strain of the synthesized samples using Williamson–Hall (W–H) plots and transmission electron microscopy (TEM) were measured. The (K+Ca)/(P+C) molar ratio in the KHAP samples was around 1.67. Actually, the incorporation of potassium in the calcium deficient apatites was accompanied by the formation of mentioned triphasic mixture ceramics, upon calcination from 400 to 600 °C. However, increasing of the firing temperature to 700 °C resulted in growth of the HAP content as the dominant phase. The XRD peaks of these prepared nano−structures show same pattern with pure HAP phase with hexagonal structure and P63/m space group. Moreover, the evaluated particle size of synthesized samples by W–H and TEM methods are in good agreement as 25–95 nm. Surface area of calcined KHAP samples at 400 to 700 °C were found as 127.83, 48.39, 12.91, and 5.32 m2 g−1, respectively. UR - https://www.inorgchemres.org/article_87496.html L1 - https://www.inorgchemres.org/article_87496_55ef0477b696ceb64502ba9dd69c9727.pdf ER -