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Titolo:
Preparation and thermal properties of calcium containing organic phosphorous compounds synthesized through reactions of calcium acetate monohydrate with phenylphosphonic acid or phosphoric acid mono-n-butyl ester
Autore:
Ueno, S; Muraoka, K; Yoshimatsu, H; Osaka, A; Miura, Y;
Indirizzi:
Ind Technol Ctr Okayama Prefecture, Okayama 7011296, Japan Ind Technol CtrOkayama Prefecture Okayama Japan 7011296 7011296, Japan Okayama Univ, Fac Engn, Okayama 7008530, Japan Okayama Univ Okayama Japan 7008530 niv, Fac Engn, Okayama 7008530, Japan Okayama Univ, Fac Environm Sci & Technol, Okayama 7008530, Japan Okayama Univ Okayama Japan 7008530 Sci & Technol, Okayama 7008530, Japan
Titolo Testata:
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
fascicolo: 10, volume: 109, anno: 2001,
pagine: 868 - 873
SICI:
0914-5400(200110)109:10<868:PATPOC>2.0.ZU;2-8
Fonte:
ISI
Lingua:
JPN
Soggetto:
HYDROXYAPATITE; PHOSPHATE; SALTS;
Keywords:
calcium containing organic phosphorous compounds; design of ceramics precuresor; control of microstructures; metal alkoxide; calcium phosphate;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Ueno, S Ind Technol Ctr Okayama Prefecture, 5301,Haga, Okayama 7011296, Japan Ind Technol Ctr Okayama Prefecture 5301,Haga Okayama Japan 7011296
Citazione:
S. Ueno et al., "Preparation and thermal properties of calcium containing organic phosphorous compounds synthesized through reactions of calcium acetate monohydrate with phenylphosphonic acid or phosphoric acid mono-n-butyl ester", J CERAM S J, 109(10), 2001, pp. 868-873

Abstract

Calcium containing organic phosphorous compounds were synthesized through reactions of calcium acetate monohydrate with phenylphosphonic acid or phosphoric acid mono-n-butyl ester in 50 vol% ethanol/water solution, and they were abbreviated as Phenyl Ca-P and Butoxy Ca-P, respectively. The effects of the phenyl and butoxy groups on the specific surface area, particle shape and thermal properties of calcium containing organic phosphorous compounds were investigated. As the amounts of added calcium acetate monohydrate (Ca/P) increased from 0.5 to 2 in the reaction solutions, the Ca/P ratios in calcium containing organic phosphorous compounds changed from 0.5 to 1. Calcium containing organic phosphorous compounds are self-assembled and have alayered structure. The interlayer distance of Phenyl Ca-P was shorter thanthat of Butoxy Ca-P. The Butoxy Ca-P particle was flake shaped, and the Phenyl Ca-P particle was an aggregate of tubular particles. The specific surface area of Phenyl Ca-P (30 m(2)/g) was larger than that of Butoxy Ca-P (5-6 m(2)/g). The thermal decomposition temperature of Phenyl Ca-P (300 degreesC) was higher than that of Butoxy Ca-P (250 degreesC). The crystal structure of calcium phosphate transformed from amorphous calcium phosphate to alpha -Ca2P2O7 by the thermal decomposition of calcium containing organic phosphorous compounds. It was possible to prepare a porous material with a hydrophobic group by using phenylphosphonic acid as a starting material.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 02:54:34