Contribution of Microwave to the Formation of Octacalcium Phosphate Intercalating Succinate Ions


We applied microwave light with frequencies 10, 212, and 419 GHz to form octacalcium phosphate (OCP) intercalated with succinate ions (SCI). The composition of starting reagents (i.e., α-type tricalcium phosphate (TCP), calcium hydrogenphosphate dihydrate (DCPD), and SCI in pure water) did not enable us to form OCP intercalated with SCI in a thermostatic water bath. Although microwave irradiation typically acts as a heat source in water, it has brought a valuable contribution to OPC formation. This paper reports the following interesting result; microwave irradiation of power less than 0.1 W enabled us to synthesize OCP intercalated with SCI which was not possible to form with power values exceeding 0.1 W.

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The authors would like to thank Dr. Hiroki Chihara and Dr. Ryo Horikoshi of Osaka Sangyo University for kindly offering facilities to prepare/treat the samples and help the X-ray diffraction measurements. We would also like to thank Prof. Keisuke Tominaga of the Kobe University for helpful discussions.

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Correspondence to Makoto Asakawa.

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Tsunawaki, Y., Sakamoto, K., Yamaguchi, S. et al. Contribution of Microwave to the Formation of Octacalcium Phosphate Intercalating Succinate Ions. J Infrared Milli Terahz Waves (2021).

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  • Microwave
  • Octacalcium phosphate
  • Intercalation
  • Succinic acid