Synthesis of hydroxyapatite using phosphate-rich glasses in the system CaO-P2O5-H2O and acoustic waves

Jiashan Hu; D. K. Agrawal; Yi Fang; R. Roy

doi:10.1007/BF00570080

Synthesis of hydroxyapatite using phosphate-rich glasses in the system CaO-P₂O₅-H₂O and acoustic waves

Jiashan Hu, D. K. Agrawal, Yi Fang, R. Roy

Materials Research Institute (MRI)

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Phosphate-rich glass powders in the CaO-P₂O₅ system were prepared by the sol-gel method using aqueous solutions of Ca(NO₃)₂·4H₂O and H₃PO₄. Glass powders were subjected to reaction with Ca(OH)₂ and water under varied experimental conditions, such as temperature (25-90 °C), particle size (1-5 and 40 μm), and ultrasound waves (20 kHz). Parallel experiments were also conducted without ultrasound for comparison. The reaction products were composed of Ca(H₂PO₄)₂·H₂O (monocalcium phosphate monohydrate), CaHPO₄ (monatite), CaHPO₄ · 2H₂O (brushite), Ca₅(PO₄)₃OH (hydroxyapatite) and amorphous calcium phosphate. It is interesting to note that hydroxyapatite and brushite were obtained at a low temperature of 60 °C in a very short period of time (30 min). All samples were characterized by X-ray diffraction and scanning electron microscopy.

Original language	English (US)
Pages (from-to)	5297-5300
Number of pages	4
Journal	Journal of Materials Science
Volume	28
Issue number	19
DOIs	https://doi.org/10.1007/BF00570080
State	Published - Jan 1 1993

All Science Journal Classification (ASJC) codes

General Materials Science
Mechanics of Materials
Mechanical Engineering

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@article{ee178d613b9d46d8bfa81d0abd0eab4f,

title = "Synthesis of hydroxyapatite using phosphate-rich glasses in the system CaO-P2O5-H2O and acoustic waves",

abstract = "Phosphate-rich glass powders in the CaO-P2O5 system were prepared by the sol-gel method using aqueous solutions of Ca(NO3)2·4H2O and H3PO4. Glass powders were subjected to reaction with Ca(OH)2 and water under varied experimental conditions, such as temperature (25-90 °C), particle size (1-5 and 40 μm), and ultrasound waves (20 kHz). Parallel experiments were also conducted without ultrasound for comparison. The reaction products were composed of Ca(H2PO4)2·H2O (monocalcium phosphate monohydrate), CaHPO4 (monatite), CaHPO4 · 2H2O (brushite), Ca5(PO4)3OH (hydroxyapatite) and amorphous calcium phosphate. It is interesting to note that hydroxyapatite and brushite were obtained at a low temperature of 60 °C in a very short period of time (30 min). All samples were characterized by X-ray diffraction and scanning electron microscopy.",

author = "Jiashan Hu and Agrawal, {D. K.} and Yi Fang and R. Roy",

year = "1993",

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T1 - Synthesis of hydroxyapatite using phosphate-rich glasses in the system CaO-P2O5-H2O and acoustic waves

AU - Hu, Jiashan

AU - Agrawal, D. K.

AU - Fang, Yi

AU - Roy, R.

PY - 1993/1/1

Y1 - 1993/1/1

N2 - Phosphate-rich glass powders in the CaO-P2O5 system were prepared by the sol-gel method using aqueous solutions of Ca(NO3)2·4H2O and H3PO4. Glass powders were subjected to reaction with Ca(OH)2 and water under varied experimental conditions, such as temperature (25-90 °C), particle size (1-5 and 40 μm), and ultrasound waves (20 kHz). Parallel experiments were also conducted without ultrasound for comparison. The reaction products were composed of Ca(H2PO4)2·H2O (monocalcium phosphate monohydrate), CaHPO4 (monatite), CaHPO4 · 2H2O (brushite), Ca5(PO4)3OH (hydroxyapatite) and amorphous calcium phosphate. It is interesting to note that hydroxyapatite and brushite were obtained at a low temperature of 60 °C in a very short period of time (30 min). All samples were characterized by X-ray diffraction and scanning electron microscopy.

AB - Phosphate-rich glass powders in the CaO-P2O5 system were prepared by the sol-gel method using aqueous solutions of Ca(NO3)2·4H2O and H3PO4. Glass powders were subjected to reaction with Ca(OH)2 and water under varied experimental conditions, such as temperature (25-90 °C), particle size (1-5 and 40 μm), and ultrasound waves (20 kHz). Parallel experiments were also conducted without ultrasound for comparison. The reaction products were composed of Ca(H2PO4)2·H2O (monocalcium phosphate monohydrate), CaHPO4 (monatite), CaHPO4 · 2H2O (brushite), Ca5(PO4)3OH (hydroxyapatite) and amorphous calcium phosphate. It is interesting to note that hydroxyapatite and brushite were obtained at a low temperature of 60 °C in a very short period of time (30 min). All samples were characterized by X-ray diffraction and scanning electron microscopy.

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Synthesis of hydroxyapatite using phosphate-rich glasses in the system CaO-P₂O₅-H₂O and acoustic waves

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