Synthesis of the borate-based compound with ZrOCl 2 to form B 2 O 3 -ZrO 2 has been conducted. The compound was characterized by FT-IR spectrophotometer, X-ray diffraction, acidity and thermal stability test. The results showed that the FT-IR main vibration spectrum of B 2 O 3 -ZrO 2 compound has appeared at wave number 401.2 cm -1 for Zr-O bonding vibration, 617.2 cm -1 for B-O-B bonding vibration and 910.4 cm -1 for B-O bonding vibration. The XRD diffraction pattern shows B 2 O 3 -ZrO 2 compound has an amorphous structure. The FT-IR spectrum after saturated with ammonia and potentiometric titration indicates that the compound of B 2 O 3 -ZrO 2 has acidic properties with a strong level of acidity. Thermal stability test shows that the B 2 O 3 -ZrO 2 compounds have high stability on temperature with increasing crystallinity after the compound was heated at 700 °C.
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