ISSN 0862-5468 (Print), ISSN 1804-5847 (online)

 Information
Home
Publisher
Publication policy
Editorial board
Editors
Impact factor

Online submission
Author guidelines
Instruction for reviewers
Download instructions
 List of Content
Volume 59, 2015
  - Issue 1
  -
Issue 2
  - Issue 3
  - Issue 4
Volume 58, 2014
  - Issue 1
  -
Issue 2
  - Issue 3
  - Issue 4
Volume 57, 2013
  - Issue 1
  -
Issue 2
  - Issue 3
  - Issue 4
Previous Issues
  - 1995 - 2012

Ceramics-Silikáty 57 (1) 14-21 (2013)


GREEN SYNTHESIS OF CALCIUM AND PHOSPHATE COMPOUNDS BY VARYING pH VALUE AND Ca/P ATOMIC RATIO USING AQUEOUS PRECIPITATIONS

Chen W. C., Ju C. P., Cheng W. H., Chernlin J. H.

Using an aqueous synthesis with varying pH values and changing ion source of calcium-to-phosphorus atomic ratios to clarify precipitations was the purpose of this study. The precipitation procedures were processed in two ways; firstly, a pH range of 3.0 to 12.0 was controlled while the ion source of relative Ca/P ratio was kept at 2.0. Secondly, the reaction was kept alkaline with a pH of 12.0 and the value range of Ca/P ratios in the precursor ion-solutions was 1.0 to 3.0. The physicochemical properties were measured to characterize the various precipitates. Results showed that when the pH was varied, the morphology of the precipitates gradually changed to micrometer column-like shape under acidic condition and nano-scale globular-like shape in alkaline environments. By controlling the pH and Ca/P ratio of ion-sources in aqueous reactions, precipitates in biphasics of calcium carbonate/apatite and calcium hydroxide/apatite were obtained with nanometer-scale morphologies. The precipitation procedures that are used in the synthesis of the biphasics provide a simpler, safer, less expensive and more environmentally friendly than the co-precipitation by sintering processes.

Keywords: Apatite, Precipitation, Biomaterials, Biphasic, Calcium carbonate

 Download the full version (PDF, 1.33 MB)

[Back]

 Webmaster l Journal Contact l Server Statistics l Last updated 11/15/15 l