Bioactive Glass-ceramics Prepared by Hydrothermal Hot-Pressing

Koji Ioku, Tokio Kai, Mamoru Nishioka, Kazumichi Yanagisawa, Nakamichi Yamasaki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Bioactive glasses in the system Na2O-CaO-SiO2-P2O5 are useful as implant materials for repairing bone because of their high bone-bonding ability. Their mechanical strength are, however in sufficient for bone substitutes under load-bearing conditions. The present study deals with preparation of the bioactive glass reinforced with rod-shaped crystals by hydrothermal hot-pressing (Fig. 1). The glass powders in the system Na2O-CaO-SiO2-P2O5 solidified by hydrothermal hot-pressing at 100 °C contained no crystalline phases. The solidified glass had about 86 % density. The Vickers hardness and the compressive strength of the solidified glass were 1 GPa and 150 MPa. The glass powders subjected to a hydrothermal treatment above 150 °C contained crystalline phases of NaCa2HSi3O9 and Na2Ca2Si3O9 (Fig. 2). The glass-ceramics prepared at 350 °C was almost pore free and homogeneously precipitated rod-shaped crystals with the length of about 3 μ;m and with the width of about 0.3 μ;m (Fig. 3). The Vickers hardness and the compressive strength of the glass-ceramics were 3 GPa and 460 MPa (Fig. 6). The fracture toughness KIC was 2.5 ± 0.3 MPa.m1/2, about five times that of the parent glass prepared by the conventional method. This high fracture toughness of glass-ceramics might be attributed to the crack defrection toughening and pull-out toughening with the rod-shaped crystals.

Original languageEnglish
Pages (from-to)1408-1412
Number of pages5
JournalNippon Kagaku Kaishi
Volume1991
Issue number10
DOIs
Publication statusPublished - 1991
Externally publishedYes

Fingerprint

Bioactive glass
Glass ceramics
Hot pressing
phosphorus pentoxide
Glass
Bone
Vickers hardness
Toughening
Powders
Crystals
Compressive strength
Fracture toughness
Bearings (structural)
Crystalline materials
Bone Substitutes
Strength of materials
Cracks

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Ioku, K., Kai, T., Nishioka, M., Yanagisawa, K., & Yamasaki, N. (1991). Bioactive Glass-ceramics Prepared by Hydrothermal Hot-Pressing. Nippon Kagaku Kaishi, 1991(10), 1408-1412. https://doi.org/10.1246/nikkashi.1991.1408

Bioactive Glass-ceramics Prepared by Hydrothermal Hot-Pressing. / Ioku, Koji; Kai, Tokio; Nishioka, Mamoru; Yanagisawa, Kazumichi; Yamasaki, Nakamichi.

In: Nippon Kagaku Kaishi, Vol. 1991, No. 10, 1991, p. 1408-1412.

Research output: Contribution to journalArticle

Ioku, K, Kai, T, Nishioka, M, Yanagisawa, K & Yamasaki, N 1991, 'Bioactive Glass-ceramics Prepared by Hydrothermal Hot-Pressing', Nippon Kagaku Kaishi, vol. 1991, no. 10, pp. 1408-1412. https://doi.org/10.1246/nikkashi.1991.1408
Ioku, Koji ; Kai, Tokio ; Nishioka, Mamoru ; Yanagisawa, Kazumichi ; Yamasaki, Nakamichi. / Bioactive Glass-ceramics Prepared by Hydrothermal Hot-Pressing. In: Nippon Kagaku Kaishi. 1991 ; Vol. 1991, No. 10. pp. 1408-1412.
@article{5dbc503bd0784f8abf6980ca67fa71d8,
title = "Bioactive Glass-ceramics Prepared by Hydrothermal Hot-Pressing",
abstract = "Bioactive glasses in the system Na2O-CaO-SiO2-P2O5 are useful as implant materials for repairing bone because of their high bone-bonding ability. Their mechanical strength are, however in sufficient for bone substitutes under load-bearing conditions. The present study deals with preparation of the bioactive glass reinforced with rod-shaped crystals by hydrothermal hot-pressing (Fig. 1). The glass powders in the system Na2O-CaO-SiO2-P2O5 solidified by hydrothermal hot-pressing at 100 °C contained no crystalline phases. The solidified glass had about 86 {\%} density. The Vickers hardness and the compressive strength of the solidified glass were 1 GPa and 150 MPa. The glass powders subjected to a hydrothermal treatment above 150 °C contained crystalline phases of NaCa2HSi3O9 and Na2Ca2Si3O9 (Fig. 2). The glass-ceramics prepared at 350 °C was almost pore free and homogeneously precipitated rod-shaped crystals with the length of about 3 μ;m and with the width of about 0.3 μ;m (Fig. 3). The Vickers hardness and the compressive strength of the glass-ceramics were 3 GPa and 460 MPa (Fig. 6). The fracture toughness KIC was 2.5 ± 0.3 MPa.m1/2, about five times that of the parent glass prepared by the conventional method. This high fracture toughness of glass-ceramics might be attributed to the crack defrection toughening and pull-out toughening with the rod-shaped crystals.",
author = "Koji Ioku and Tokio Kai and Mamoru Nishioka and Kazumichi Yanagisawa and Nakamichi Yamasaki",
year = "1991",
doi = "10.1246/nikkashi.1991.1408",
language = "English",
volume = "1991",
pages = "1408--1412",
journal = "Nippon Kagaku Kaishi / Chemical Society of Japan - Chemistry and Industrial Chemistry Journal",
issn = "0369-4577",
publisher = "Chemical Society of Japan",
number = "10",

}

TY - JOUR

T1 - Bioactive Glass-ceramics Prepared by Hydrothermal Hot-Pressing

AU - Ioku, Koji

AU - Kai, Tokio

AU - Nishioka, Mamoru

AU - Yanagisawa, Kazumichi

AU - Yamasaki, Nakamichi

PY - 1991

Y1 - 1991

N2 - Bioactive glasses in the system Na2O-CaO-SiO2-P2O5 are useful as implant materials for repairing bone because of their high bone-bonding ability. Their mechanical strength are, however in sufficient for bone substitutes under load-bearing conditions. The present study deals with preparation of the bioactive glass reinforced with rod-shaped crystals by hydrothermal hot-pressing (Fig. 1). The glass powders in the system Na2O-CaO-SiO2-P2O5 solidified by hydrothermal hot-pressing at 100 °C contained no crystalline phases. The solidified glass had about 86 % density. The Vickers hardness and the compressive strength of the solidified glass were 1 GPa and 150 MPa. The glass powders subjected to a hydrothermal treatment above 150 °C contained crystalline phases of NaCa2HSi3O9 and Na2Ca2Si3O9 (Fig. 2). The glass-ceramics prepared at 350 °C was almost pore free and homogeneously precipitated rod-shaped crystals with the length of about 3 μ;m and with the width of about 0.3 μ;m (Fig. 3). The Vickers hardness and the compressive strength of the glass-ceramics were 3 GPa and 460 MPa (Fig. 6). The fracture toughness KIC was 2.5 ± 0.3 MPa.m1/2, about five times that of the parent glass prepared by the conventional method. This high fracture toughness of glass-ceramics might be attributed to the crack defrection toughening and pull-out toughening with the rod-shaped crystals.

AB - Bioactive glasses in the system Na2O-CaO-SiO2-P2O5 are useful as implant materials for repairing bone because of their high bone-bonding ability. Their mechanical strength are, however in sufficient for bone substitutes under load-bearing conditions. The present study deals with preparation of the bioactive glass reinforced with rod-shaped crystals by hydrothermal hot-pressing (Fig. 1). The glass powders in the system Na2O-CaO-SiO2-P2O5 solidified by hydrothermal hot-pressing at 100 °C contained no crystalline phases. The solidified glass had about 86 % density. The Vickers hardness and the compressive strength of the solidified glass were 1 GPa and 150 MPa. The glass powders subjected to a hydrothermal treatment above 150 °C contained crystalline phases of NaCa2HSi3O9 and Na2Ca2Si3O9 (Fig. 2). The glass-ceramics prepared at 350 °C was almost pore free and homogeneously precipitated rod-shaped crystals with the length of about 3 μ;m and with the width of about 0.3 μ;m (Fig. 3). The Vickers hardness and the compressive strength of the glass-ceramics were 3 GPa and 460 MPa (Fig. 6). The fracture toughness KIC was 2.5 ± 0.3 MPa.m1/2, about five times that of the parent glass prepared by the conventional method. This high fracture toughness of glass-ceramics might be attributed to the crack defrection toughening and pull-out toughening with the rod-shaped crystals.

UR - http://www.scopus.com/inward/record.url?scp=34547663632&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34547663632&partnerID=8YFLogxK

U2 - 10.1246/nikkashi.1991.1408

DO - 10.1246/nikkashi.1991.1408

M3 - Article

AN - SCOPUS:34547663632

VL - 1991

SP - 1408

EP - 1412

JO - Nippon Kagaku Kaishi / Chemical Society of Japan - Chemistry and Industrial Chemistry Journal

JF - Nippon Kagaku Kaishi / Chemical Society of Japan - Chemistry and Industrial Chemistry Journal

SN - 0369-4577

IS - 10

ER -