摘要
Nanophase culcium-deficient hydroxyapatite（ CDHA ） with a Ca/P ratio about 1.5 synthesized by chemical wet method was sintered at different temperatures, and then its chemical composition, phase structure arut morphology were analyzed with methods of FT-IR spectrascopy, X-ray diffraction （XRD） and field emission scanning microscopy （FESEM）, respectively. Results show that when the sintering temperature is below 500℃ , apatite crystal keeps a stable size with a diameter of 12- 26 nm and a length of 30-66 run. After being sintered at 600℃ for 2 h, apatite crystal grows much larger with a diameter of 25-40 nm and a length of 75- 100 nm. At the temperature of 700-800 ℃ , this powder decomposes into, Ca3 （ PO4）2, The crystal size of the Ca3 （ PO4）2 surpasses 200nm in diameter and length. NH4^＋ ion can be removed at temperature beyond 300℃ .
Nanophase culcium-deficient hydroxyapatite（ CDHA ） with a Ca/P ratio about 1.5 synthesized by chemical wet method was sintered at different temperatures, and then its chemical composition, phase structure arut morphology were analyzed with methods of FT-IR spectrascopy, X-ray diffraction （XRD） and field emission scanning microscopy （FESEM）, respectively. Results show that when the sintering temperature is below 500℃ , apatite crystal keeps a stable size with a diameter of 12- 26 nm and a length of 30-66 run. After being sintered at 600℃ for 2 h, apatite crystal grows much larger with a diameter of 25-40 nm and a length of 75- 100 nm. At the temperature of 700-800 ℃ , this powder decomposes into, Ca3 （ PO4）2, The crystal size of the Ca3 （ PO4）2 surpasses 200nm in diameter and length. NH4^＋ ion can be removed at temperature beyond 300℃ .
基金
FundedbytheProjectofKeyIndustryTechnologyR&DProgramofXi’an(No.GG200356)
