Synthesis of β-TCP by sol-gel method: variation of Ca/P molar ratio

13th Joint Conference on Chemistry

Windarti, Tri^1 ; Darmawan, Adi^1 ; Marliana, Ana^1

Department of Chemistry, Diponegoro University, Tembalang, Semarang, Indonesia^1

关键词: Ca/P ratio;    Calcium nitrate tetra-hydrate;    Grain size;    Irregular shape;    Morphology changed;    Phosphorous pentoxide;    Secondary product;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/509/1/012147/pdf
DOI  :  10.1088/1757-899X/509/1/012147

来源: IOP

【 摘 要 】

Beta-TCP has been synthesized by sol-gel method in ethanol media with Ca/P molar ratio of 1.0-1.5. Phosphorous pentoxide solution was slowly added into calcium nitrate tetrahydrate solution with gentle stirring to produce white gel. The white gel was dried at 80°C for 20 hours and continued by calcination process at 800°C for 30 minutes. The results showed that pure β-TCP powders was obtained from Ca/P molar ratio of 1.3. For Ca/P of 1.0-1.2, beside β-TCP, a little amount of β-CPP were found and for Ca/P ratio of 1.4-1.5, hydroxyapatite was formed as secondary product. The crystallite size of β-TCP was in a range of 32.96-47.82 nm. Morphology changed due to Ca/P molar ratio in which the size of irregular shape β-TCP became bigger as Ca/P molar ratio increased from 1.0 to 1.3. The presence of hydroxyapatite in the product has not changed the morphology shape but reduced its grain size.