THE EFFECT OF RAW MATERIALS CONCENTRATION ON HYDROXYAPATITE POWDER CHARACTERISTICS AND SINTERING BEHAVLOR

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BARADARI H.; AMANI HAMEDANI H.; KARIMI KHOYGANI S.; REZAEI H.R.; JAVADPOUR J.; SARPOULAKI H.

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Journal Paper

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Journal: Iranian Journal of Materials Science and Engineering Year:2006 | Volume:3 | Issue:1-2 Page(s): 1-6

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Title

THE EFFECT OF RAW MATERIALS CONCENTRATION ON HYDROXYAPATITE POWDER CHARACTERISTICS AND SINTERING BEHAVLOR

Author(s)

Keywords

HYDROXYAPATITE

CHEMICAL PRECIPITATION

NANOCRYSTALLITES

MORPHOLOGY

SINTERING

MICROSTRUCTURE

Abstract

Ultrafine HYDROXYAPATITE (HAp) powders with crystallite size in the range of 10-90 nm were synthesized by CHEMICAL PRECIPITATION process using Ca(OH)2 and H3PO4 solutions as starting materials. Molar ratio of Ca/P=1.68 was kept constant throughout the process and alkaline condition for the reaction was maintained using ammonium hydroxide. The role of raw material concentration on HAp crystallite size and MORPHOLOGY were investigated using X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. The results revealed that variations in crystallite size and MORPHOLOGY of synthesized HAp are strongly affected by the concentration of acid solution. To study the SINTERING behavior of HAp particles, the powders were pressed at 200 MPa using a uniaxial press. SINTERING experiments were carried out at temperatures of 1100, 1250 and 1300°C with various soaking times at maximum temperatures. XRD was also used in determining thephases present after SINTERING process. The results indicated the decomposition of HAp into a-tricalcium phosphate (TCP) and b-TCP phases at 1300°C. The MICROSTRUCTURE of the sintered HAp ceramics was characterized by SEM.

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APA: Copy

BARADARI, H., AMANI HAMEDANI, H., KARIMI KHOYGANI, S., REZAEI, H.R., JAVADPOUR, J., & SARPOULAKI, H.. (2006). THE EFFECT OF RAW MATERIALS CONCENTRATION ON HYDROXYAPATITE POWDER CHARACTERISTICS AND SINTERING BEHAVLOR. IRANIAN JOURNAL OF MATERIALS SCIENCE AND ENGINEERING, 3(1-2), 1-6. SID. https://sid.ir/paper/276677/en

Vancouver: Copy

BARADARI H., AMANI HAMEDANI H., KARIMI KHOYGANI S., REZAEI H.R., JAVADPOUR J., SARPOULAKI H.. THE EFFECT OF RAW MATERIALS CONCENTRATION ON HYDROXYAPATITE POWDER CHARACTERISTICS AND SINTERING BEHAVLOR. IRANIAN JOURNAL OF MATERIALS SCIENCE AND ENGINEERING[Internet]. 2006;3(1-2):1-6. Available from: https://sid.ir/paper/276677/en

IEEE: Copy

H. BARADARI, H. AMANI HAMEDANI, S. KARIMI KHOYGANI, H.R. REZAEI, J. JAVADPOUR, and H. SARPOULAKI, “THE EFFECT OF RAW MATERIALS CONCENTRATION ON HYDROXYAPATITE POWDER CHARACTERISTICS AND SINTERING BEHAVLOR,” IRANIAN JOURNAL OF MATERIALS SCIENCE AND ENGINEERING, vol. 3, no. 1-2, pp. 1–6, 2006, [Online]. Available: https://sid.ir/paper/276677/en

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