Porous hydroxyapatite with tailored crystal surface prepared by hydrothermal method

Koji Ioku; Giichiro Kawachi; Nakamichi Yamasaki; Hirotaka Fujimori; Seishi Goto

doi:10.4028/0-87849-961-x.353

Porous hydroxyapatite with tailored crystal surface prepared by hydrothermal method

Koji Ioku, Giichiro Kawachi, Nakamichi Yamasaki, Hirotaka Fujimori, Seishi Goto

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

1 Citation (Scopus)

Abstract

Porous plates of hydroxyapatite (Ca₁₀(PO₄) ₆(OH)₂; HA) with about 0.5 to 5 mm in thickness and porous HA granules of about 40 μm to 1 mm in size with tailored crystal surface were prepared by the hydrothermal vapor exposure method at the temperatures above 105°C under saturated vapor pressure of pure water. Porous HA plates with about 75% porosity prepared at 120 °C were composed of rod-shaped crystals of about 20 μm in length. Porous HA granules prepared at 160°C were also composed of rod-shaped crystals of about 20 μm in length with the mean aspect ratio of 30. These crystals were elongated along the c-axis. Rod-shaped HA crystals were locked together to make micro-pores of about 0.1 to 0.5 μm in size. Both of materials were nonstoichiometric HA with calcium deficient composition. These materials must have the advantage of adsorptive activity, because they had large specific crystal surface and much micro-pores.

Original language	English
Pages (from-to)	353-356
Number of pages	4
Journal	Key Engineering Materials
Volume	284-286
DOIs	https://doi.org/10.4028/0-87849-961-x.353
Publication status	Published - 2005
Externally published	Yes

Keywords

Granule
Hydrothermal
Hydroxyapatite
Plate
Porous material

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.4028/0-87849-961-x.353

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@article{00138ad81c4c43698fb86de4a89bb471,

title = "Porous hydroxyapatite with tailored crystal surface prepared by hydrothermal method",

abstract = "Porous plates of hydroxyapatite (Ca10(PO4) 6(OH)2; HA) with about 0.5 to 5 mm in thickness and porous HA granules of about 40 μm to 1 mm in size with tailored crystal surface were prepared by the hydrothermal vapor exposure method at the temperatures above 105°C under saturated vapor pressure of pure water. Porous HA plates with about 75% porosity prepared at 120 °C were composed of rod-shaped crystals of about 20 μm in length. Porous HA granules prepared at 160°C were also composed of rod-shaped crystals of about 20 μm in length with the mean aspect ratio of 30. These crystals were elongated along the c-axis. Rod-shaped HA crystals were locked together to make micro-pores of about 0.1 to 0.5 μm in size. Both of materials were nonstoichiometric HA with calcium deficient composition. These materials must have the advantage of adsorptive activity, because they had large specific crystal surface and much micro-pores.",

keywords = "Granule, Hydrothermal, Hydroxyapatite, Plate, Porous material",

author = "Koji Ioku and Giichiro Kawachi and Nakamichi Yamasaki and Hirotaka Fujimori and Seishi Goto",

year = "2005",

doi = "10.4028/0-87849-961-x.353",

language = "English",

volume = "284-286",

pages = "353--356",

journal = "Key Engineering Materials",

issn = "1013-9826",

publisher = "Trans Tech Publications",

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TY - JOUR

T1 - Porous hydroxyapatite with tailored crystal surface prepared by hydrothermal method

AU - Ioku, Koji

AU - Kawachi, Giichiro

AU - Yamasaki, Nakamichi

AU - Fujimori, Hirotaka

AU - Goto, Seishi

PY - 2005

Y1 - 2005

N2 - Porous plates of hydroxyapatite (Ca10(PO4) 6(OH)2; HA) with about 0.5 to 5 mm in thickness and porous HA granules of about 40 μm to 1 mm in size with tailored crystal surface were prepared by the hydrothermal vapor exposure method at the temperatures above 105°C under saturated vapor pressure of pure water. Porous HA plates with about 75% porosity prepared at 120 °C were composed of rod-shaped crystals of about 20 μm in length. Porous HA granules prepared at 160°C were also composed of rod-shaped crystals of about 20 μm in length with the mean aspect ratio of 30. These crystals were elongated along the c-axis. Rod-shaped HA crystals were locked together to make micro-pores of about 0.1 to 0.5 μm in size. Both of materials were nonstoichiometric HA with calcium deficient composition. These materials must have the advantage of adsorptive activity, because they had large specific crystal surface and much micro-pores.

AB - Porous plates of hydroxyapatite (Ca10(PO4) 6(OH)2; HA) with about 0.5 to 5 mm in thickness and porous HA granules of about 40 μm to 1 mm in size with tailored crystal surface were prepared by the hydrothermal vapor exposure method at the temperatures above 105°C under saturated vapor pressure of pure water. Porous HA plates with about 75% porosity prepared at 120 °C were composed of rod-shaped crystals of about 20 μm in length. Porous HA granules prepared at 160°C were also composed of rod-shaped crystals of about 20 μm in length with the mean aspect ratio of 30. These crystals were elongated along the c-axis. Rod-shaped HA crystals were locked together to make micro-pores of about 0.1 to 0.5 μm in size. Both of materials were nonstoichiometric HA with calcium deficient composition. These materials must have the advantage of adsorptive activity, because they had large specific crystal surface and much micro-pores.

KW - Granule

KW - Hydrothermal

KW - Hydroxyapatite

KW - Plate

KW - Porous material

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U2 - 10.4028/0-87849-961-x.353

DO - 10.4028/0-87849-961-x.353

M3 - Article

AN - SCOPUS:33846310865

SN - 1013-9826

VL - 284-286

SP - 353

EP - 356

JO - Key Engineering Materials

JF - Key Engineering Materials

ER -

Porous hydroxyapatite with tailored crystal surface prepared by hydrothermal method

Abstract

Keywords

ASJC Scopus subject areas

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