Publication detail

Direct synthesis of nanocrystalline hydroxyapatite by hydrothermal hydrolysis of alkylphosphates

CIHLÁŘ, J. ČÁSTKOVÁ, K.

English title

Direct synthesis of nanocrystalline hydroxyapatite by hydrothermal hydrolysis of alkylphosphates

Type

Peer-reviewed article not indexed in WoS or Scopus

Language

en

Original abstract

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.

Keywords in English

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

Released

2002-01-01

ISSN

0026-9247

Volume

133

Number

6

Pages from–to

761–

Pages count

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"
}