CATION-EXCHANGE CHARACTERISTICS OF SINTERED HYDROXYAPATITE IN THE STRONGLY ACIDIC REGION

Authors
SUZUKI S FUZITA T MARUYAMA T TAKAHASHI M HIKICHI Y
Citation
S. Suzuki et al., CATION-EXCHANGE CHARACTERISTICS OF SINTERED HYDROXYAPATITE IN THE STRONGLY ACIDIC REGION, Journal of the American Ceramic Society, 76(6), 1993, pp. 1638-1640
Citations number
7
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of the American Ceramic Society → ACNP
ISSN journal
00027820
Volume
76
Issue
6
Year of publication
1993
Pages
1638 - 1640
Database
ISI
SICI code
0002-7820(1993)76:6<1638:CCOSHI>2.0.ZU;2-N
Abstract
The ion-exchange behavior of hydroxyapatite (Ca10(PO4)6-(OH)2) (HAp), fired at high temperatures, has been investigated in the strongly acid ic region (pH 2 and 3). According to the present study, HAp fired abov e 1000-degrees-C can exchange ions from Ca2+ to Pb2+, even at pH 2, wi thout dissolution. The molar ratios of Pb2+/Ca2+ after ion exchange ar e approximately unity in all cases. Ion exchange occurs in a thin laye r near the surface of HAp particles fired at 1300-degrees-C. After ion exchange, Pb-Cl-apatite crystals are created in the strongly acidic r egion (pH 2).