Synthesis of hydroxyapatite nanoparticles in ultrasonic precipitation

Characterization of silicon-substituted hydroxyapatite powders synthesized by a wet precipitation method

“…Si-substituted HA (Si-HA) has been synthesized using different methods such as the sol-gel route [23], solid state reactions [11], hydrothermal techniques [6,24], microwave irradiation [25] and precipitation from aqueous solutions [10,26,27]. Each having its own advantages and disadvantages, aqueous precipitation methods are the most often described in the literature, it is the most talented route owing to its ease in experiment operations, low working temperature, high percentages of pure products and inexpensive equipment requirement [28,29].…”

Nano-Particulate Calcium Phosphate as a Gene Delivery System

“…Also, to produce high quality HAp bioceramics for artificial bone substitution, ultrafine HAp powder is usually employed. Nano-HAp powder results in easy handling, casting, and sintering leading to an excellent sintered body in the bioceramics preparation process (Cao et al, 2005).…”

A novel method to synthesize nanocrystalline hydroxyapatite: Characterization with x-ray diffraction and infrared spectroscopy

“…Liou and al. [12] demonstrated that the activation energy of the β -TCP Ca 3 (PO 4 ) 2 (tricalcium phosphate) phase formation in systems with H 3 PO 4 as the P source was lower than those with (NH 4 )H 2 PO 4 .…”

“…The use of this ratio means that the pH of the reaction mixture is self-buffered with high pH between 10 and 12. So we don't need the addition of any base such as ammonium hydroxide NH 4 OH as reported in the literature.…”

“…All these properties of HA powders were depended on which process was performed. In particular, wet-chemical precipitation is the most complicated method [4,5]. The wet-chemical precipitation was originally investigated by Jarcho and co-worker in 1976 [6].…”