Preparation, characterization, and thermal stability of B2O3-ZrO2

Abstract

Synthesis of the borate-based compound with ZrOCl₂ to form B₂O₃-ZrO₂ 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 B₂O₃-ZrO₂ 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 B₂O₃-ZrO₂ compound has an amorphous structure. The FT-IR spectrum after saturated with ammonia and potentiometric titration indicates that the compound of B₂O₃-ZrO₂ has acidic properties with a strong level of acidity. Thermal stability test shows that the B₂O₃-ZrO₂ compounds have high stability on temperature with increasing crystallinity after the compound was heated at 700 °C.

Keywords: B₂O₃-ZrO_2, impregnation, thermal stability.