作者：HIDEKI MONMA;

作者单位：Faculty of Engineering at Kogakuin University

刊名：Journal of the Technical Association of Refractories

ISSN：0285-0028

出版年：2007-01-05

卷：27

期：4

起页：228

止页：233

分类号：TQ175

语种：英文

关键词：

内容简介

Phosphate materials have been used in various applications such as phosphate fertilizer, fluorescent lamps, ion exchange material, chromatographic adsorbent for proteins, artificial bone, toothpaste additive, food additive, refractory binder and so forth. In 1970 a new type of calcium phosphate material, i.e., a hydraulic type (hereafter, CP cement), was developed. In a sense, as hydraulic materials were already in existence in the CaO-Al_2O_3, CaO-SiO_2 and CaO-SO_3 systems as Portland cement minerals and gypsum, the discovery of the new hydraulic CaO-P_2O_5 system could be considered reasonable from the periodic table row of the elements _(13)Al, _(14)Si, _(15)P, _(16)S Hardened bodies obtained from CP cement are porous and could be sintered to form porous ceramics without cracks. CP cement is called bioactive cement, and its hydration hardening occurs mainly with the formation of hydroyapatite (hereafter, HAp). Various CP cement compositions have been developed so far, and their cement properties have been studied. Figure 1 shows hardened bodies and sintered ceramics prepared from CP cement. Recently CP cement and porous calcium phosphate materials have become of interest as basic materials in bone restorative and regenerative therapies, e.g., tooth root sealer, injectable filling for bone cavities, porous structures (scaffold) or bone cell cultures, etc.