Abstract
Preparation of B 2 O 3 -SiO 2 compound by inorganic synthesis was carried out. B 2 O 3 -SiO 2 was characterized by FT-IR spectro-photometer, analysis of crystallinity by XRD, and test of acidity. B 2 O 3 -SiO 2 was also tested by thermal stability with temperature range at 300-700 ⁰C. The results showed that the FT-IR spectrum of B 2 O 3 -SiO 2 has some vibrations of B-O, Si-O-Si, Si-O-B stretching, and Si-O-B bending at 1442.8 cm -1 , 779.2 cm -1 , 925.8 cm -1 , and 648.1 cm -1 . The X-Ray diffraction pattern results showed that the analysis of B 2 O 3 -SiO 2 has high crystallinity with two peaks diffraction identified at 26.6⁰ and 20.9⁰. The thermal stability test of B 2 O 3 -SiO 2 showed that B 2 O 3 -SiO 2 has high thermal stability with temperature range at 300-700 ⁰C. The results showed that the acidity analysis of B 2 O 3 -SiO 2 has potential number 122.71 mV so that indicated B 2 O 3 -SiO 2 was high acidity. Keywords : boric oxide, silica dioxide, boric silica, B 2 O 3 -SiO 2
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