HYDRATION IN THE SYSTEM CA2SIO4-CA3(PO4)2 AT 90-DEGREES-C

被引：12

作者：

BARNES, MW

KLIMKIEWICZ, M

BROWN, PW

机构：

[1] Materials Research Laboratory, Pennsylvania State University, University Park, Pennsylvania

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1992年 / 75卷 / 06期

关键词：

HYDRATION; CALCIUM SILICATE; CALCIUM PHOSPHATE; HIGH TEMPERATURE; HYDROXYLAPATITE;

D O I：

10.1111/j.1151-2916.1992.tb04204.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Compositions along the Ca2SiO4-Ca3(PO4)2 join were hydrated at 90-degrees-C. Mixtures containing 15, 38, 50, 80, and 100 mol% Ca3(PO4)2 were fired at 1500-degrees-C, forming nagelschmidtite + a'-CaSiO4, A-phase, and silicocarnotite and a-Ca3(PO4)2, respectively. Hydration of these produces hydroxylapatite regardless of composition. Calcium silicate hydrate gel is produced when Ca2SiO4 not-equal 0 and portlandite when Ca2SiO4 is >50%. Relative hydration reactivities are a-Ca3(PO4)2 > nagelschmidtite > alpha'-Ca2SiO4 > A-phase > silicocarnotite. Hydration in the presence of silica or lime influences the amount of portlandite produced. Hydration in NaOH solution produces 14-angstrom tobermorite rather than calcium silicate hydrate gel.

引用

页码：1423 / 1429

页数：7

共 17 条

[1]

BARNES MW, 1991, MATERIALS RES SOC S, V179, P245

[2]

Barrett RL, 1942, AM MINERAL, V27, P680

[3] Isomorphism and allotropy in compounds of the type A(2)XO(4) [J].