Calcium sulfate hemihydrate powders with a controlled morphology for use as bone cement

Peng Wang, Eun Jung Lee, Chee Sung Park, Byung Ho Yoon, Du Sik Shin, Hyoun Ee Kim, Young-Hag Koh, Soon Hyo Park

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Calcium sulfate hemihydrate (CSH) powders were synthesized for use as bone cement by heat treating calcium sulfate dihydrate (CSD) powders in boiling CaCl 2 solutions with various CaCl 2 concentrations, ranging from 23.5 to 35.5 wt%, in order to control their morphology. All of the prepared CSH powders showed X-ray diffraction peaks corresponding to the CSH structure without any secondary phases, implying complete conversion from the CSD phase to the CSH phase. It was also observed that the concentration of CaCl 2 significantly affected the morphology of the CSH powder that was synthesized. In other words, as the CaCl 2 concentration was decreased from 35.5 to 23.5 wt%, the morphology notably changed from long-and-slim hexagonal rods with an aspect ratio of 5.5 to fat-and-short hexagonal columns with an aspect ratio of 1.4. This reduction in the aspect ratio led to a significant improvement in the compressive strength of the CSD cement prepared by mixing the CSH powders with water.

Original languageEnglish
Pages (from-to)2039-2042
Number of pages4
JournalJournal of the American Ceramic Society
Issue number6
Publication statusPublished - 2008 Jun 1


ASJC Scopus subject areas

  • Ceramics and Composites

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