Detail publikace

Direct synthesis of nanocrystalline hydroxyapatite by hydrothermal hydrolysis of alkylphosphates

CIHLÁŘ, J. ČÁSTKOVÁ, K.

Anglický název

Direct synthesis of nanocrystalline hydroxyapatite by hydrothermal hydrolysis of alkylphosphates

Typ

Článek recenzovaný mimo WoS a Scopus

Jazyk

en

Originální abstrakt

The influence of reaction conditions (temperature, type of catalyst, time) on the base-catalyzed reaction of mono-, di-, and trialkylphosphates (alkyl=methyl, ethyl, i-propyl, n-butyl) with Ca2+ ions and on the structure and composition of the reaction products was studied. The composition of the calcium phosphates depends mainly on the reaction temperature. At temperatures below 100 degC, a nanocrystalline solid products transforming into dicalcium phosphate by heating (calcination) was found.Pure nanocrystalline hydroxyapatite was prepared by hydrothermal synthesis at 160 degC from mono- and dialkylphosphates. The size of hydroxyapatite crystallites was about 1 nm, the particle size about 150 um. Agglomerated particles of hydroxyapatite larger than 2 um were prepared at 200 degC. Hydrothermal reaction of trialkylphosphates with Ca2+ ions at 200 degC produced CaHPO4. The experimental results were used to propose a reaction mechanism for base-catalyzed hydrothermal reactions of alkylphosphates with Ca2+ ions.

Klíčová slova anglicky

ceramics, synthesis, nanostructures, hydroxyapatite, hydrothermal synthesis, alkylphosphates

Vydáno

2002-01-01

ISSN

0026-9247

Ročník

133

Číslo

6

Strany od–do

761–

Počet stran

11

BIBTEX


@article{BUT40849,
  author="Jaroslav {Cihlář} and Klára {Částková}",
  title="Direct synthesis of nanocrystalline hydroxyapatite by hydrothermal hydrolysis of alkylphosphates",
  journal="MONATSHEFTE FUR CHEMIE",
  year="2002",
  volume="133",
  number="6",
  pages="11",
  issn="0026-9247"
}