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- W1999334842 abstract "The hydrothermal synthesis of a mcallisterite (Mg 2 (B 6 O 7 (OH) 6 ) 2 <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mrow><mml:mo>·</mml:mo></mml:mrow></mml:math>9(H 2 O)) mineral at low temperatures was characterized. For this purpose, several reaction temperatures (0–70°C) and reaction times (30–240 min) were studied. Synthesized minerals were subjected to X-ray diffraction (XRD), fourier transform infrared (FT-IR), and Raman spectroscopies and scanning electron microscopy (SEM). Additionally, experimental analyses of boron trioxide (B 2 O 3 ) content and reaction yields were performed. Furthermore, thermal gravimetry and differential thermal analysis (TG/DTA) were used for the determination of thermal dehydration kinetics. According to the XRD results, mcallisterite, which has a powder diffraction file (pdf) number of “01-070-1902,” was formed under certain reaction parameters. Pure crystalline mcallisterite had diagnostic FT-IR and Raman vibration peaks and according to the SEM analysis, for the minerals which were synthesized at 60°C and 30 min of reaction time, particle size was between 398.30 and 700.06 nm. Its B 2 O 3 content and reaction yield were<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:mn>50.80</mml:mn><mml:mo>±</mml:mo><mml:mn>1.12</mml:mn></mml:math>% and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M3><mml:mn>85.80</mml:mn><mml:mo>±</mml:mo><mml:mn>0.61</mml:mn></mml:math>%, respectively. Finally, average activation energies (conversion values<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M4><mml:mo stretchy=false>(</mml:mo><mml:mi>α</mml:mi><mml:mo stretchy=false>)</mml:mo></mml:math>that were selected between 0.1 and 0.6) were calculated as 100.40 kJ/mol and 98.31 kJ/mol according to Ozawa and Kissinger-Akahira-Sunose (KAS) methods, respectively." @default.
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- W1999334842 date "2014-01-01" @default.
- W1999334842 modified "2023-09-27" @default.
- W1999334842 title "Characterization and Thermal Dehydration Kinetics of Highly Crystalline Mcallisterite, Synthesized at Low Temperatures" @default.
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- W1999334842 doi "https://doi.org/10.1155/2014/985185" @default.
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