알루미늄 에칭액으로부터 베마이트 분말 합성
Synthesis of boehmite powder from aluminum etching solution
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초록
알루미늄 에칭 폐액으로부터 boehmite(AlOOH) 분말을 합성하였다. 폐액에서 침전되어 있는 결정상은 gibbsite (Al(OH)3)였으며, 산을 이용하여 pH를 조절한 결과 pH가 7~8 영역에서 boehmite 결정상이 얻어졌다. 침전 분말에 남아 있는 Na 이온을 제거하고자 세척공정을 진행하여 boehmite 분말을 얻었다. 합성한 분말의 평균입경은 약 40 nm이었다. 또한열처리 온도가 증가함에 따라 boehmite는 γ-Al2O3와 δ-Al2O3, θ-Al2O3를 거쳐 α-Al2O3 결정상으로 상전이가 일어났다
Abstract
Boehmite (AlOOH) powder was synthesized using waste aluminium etching solution. In waste solution, precipitated phase was gibbsite (Al(OH)3), and boehmite (AlOOH) phase was obtained at pH of 7 and 8 controlled by addition of acid. Boehmite powder was obtained by washing process to remove the Na ion in precipitated solution. Mean particle size of obtained powder was 40 nm. Boehmite phase transformed to α-Al2O3 phase via γ-Al2O3, δ-Al2O3, and θ-Al2O3.
참고문헌 (16)
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