Aerosol synthesis of single-phase nanocrystalline β-Ca2P2O7 powder

Alireza Charmforoushan, Miika Sorvali, Jyrki Mäkelä

Research output: Other conference contributionPosterScientific

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Abstract

The use of calcium phosphate-based (CaP-based) materials has increased significantly over the past 20 years in a wide range of applications. Their
orthophosphate forms such as hydroxyapatite are mostly used in biomedical applications as they constitute the inorganic phase of human hard tissues. However, they do not have shown good enough mechanical properties as well as bioresorbability. Recently pyrophosphate forms of CaP-based materials (calcium pyrophosphate (Ca2P2O7) – CPP) attract attention owing to their excellent thermal and chemical stability, bioresorbability, and bioactivity. Among the polymorphs of CPP, β phase (β-CPP) is the most stable phase and has shown excellent bioproperties
such as biocompatibility. Therefore, developing simple, cheap, up-scalable, reproducible, and high-speed synthesis methods for β-CPP with high purity offers an
interesting research area. In this study, single-phase nanocrystalline β-CPP powder has been successfully synthesized with high purity by liquid flame spray (LFS) for the first time. LFS is an ultra-short synthesis time aerosol method and meets the above-mentioned criteria. Briefly, Ca(NO3)2⋅4H2O and (NH4)2HPO4 have been used as the sources of Ca and P, respectively. They have been dissolved in an ethanol and deionized water solution. Thereafter, the liquid precursor solution was fed into a turbulent H2/O2 flame with a feeding rate of 2.01 ml/min. The synthesized powder was collected from the flame with an electrostatic precipitator (ESP). The synthesized powder was characterized by X-ray fluorescence spectrometer (XRF), X-ray diffraction
analysis (XRD), Brunauer–Emmett–Teller (BET) method, and scanning electron microscopy (SEM).
Original languageEnglish
Publication statusPublished - 3 Sept 2023
Publication typeNot Eligible
EventEuropean Aerosol Conference - Spain, Malaga
Duration: 3 Sept 20238 Sept 2023
https://www.dfmf.uned.es/EAC2023/

Conference

ConferenceEuropean Aerosol Conference
Abbreviated titleEAC
CityMalaga
Period3/09/238/09/23
Internet address

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