A Rapid Setting TTCP-DCPD Cement. Study of the Setting Reaction as a Function of Time

2005 ◽  
Vol 284-286 ◽  
pp. 15-18 ◽  
Author(s):  
E.F. Burguera ◽  
Francisco Guitián ◽  
Laurence C. Chow
Keyword(s):  
Electron Microscopy ◽  
Rapid Development ◽  
Dicalcium Phosphate Dihydrate ◽  
Tetracalcium Phosphate ◽  
Setting Reaction ◽  
Scanning Electron Microscopy Examination ◽  
Phosphate Dihydrate ◽  
Rapid Setting ◽  
Microscopy Examination ◽  
Scanning Electron

The progression of the setting reaction of a tetracalcium phosphate (TTCP) –dicalcium phosphate dihydrate (DCPD) rapid setting cement was investigated as a function of time. Compressive strength and extent of conversion to hydroxyapatite (HA) were obtained at different incubation times. The results indicated a rapid development of both strength and HA conversion in the early stages of the reaction, which slowed down after 4 h, presumably as a result of HA formation on the surface of the reactants. This hypothesis was supported by scanning electron microscopy examination of cement fracture surfaces.

scholarly journals Scanning electron microscopy examination of needle tips after different procedures of deep dry needling in humans

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Emilio J. Poveda-Pagán ◽  
Sergio Hernández-Sánchez ◽  
Luis Rhys-Jones-López ◽  
Antonio Palazón-Bru ◽  
Carlos Lozano-Quijada
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Dry Needling ◽  
Scanning Electron Microscopy Examination ◽  
Microscopy Examination ◽  
Scanning Electron

scholarly journals Synthesis of Brushite from Phophogypsum Industrial Waste

2021 ◽  
Vol 12 (5) ◽  
pp. 6580-6588
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Industrial Waste ◽  
Sol Gel ◽  
Dicalcium Phosphate Dihydrate ◽  
X Ray Diffraction ◽  
Characterization Methods ◽  
X Ray ◽  
Phosphate Dihydrate ◽  
Scanning Electron

Dicalcium phosphate dihydrate (DCPD) nanoparticles, also known as brushite, are considered an important bioceramic compound. In this study, brushite was prepared from Moroccan phosphogypsum (PG) using a new sol-gel method. A two-step technique undergoes the synthesis of brushite, the preparation of anhydrite from PG followed by adding phosphoric acid in the presence of sodium hydroxide. The morphology, the chemical composition, and the crystallites size were obtained using Scanning Electron Microscopy (SEM-EDAX), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR), respectively. According to the Debye-Scherrer equation, these characterization methods indicated that the synthesized brushite was highly pure according to the Ca/P ratio of 1.14 and an average crystallites size estimated at 66 nm. These results proved that the brushite was successfully synthesized from Moroccan phosphogypsum.

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