세라믹소지에 생성되는 석회에 의한 백화현상분석

Analysis of Ca-rich efflorescence in ceramic bodies

  • Lee, Ki-Gang (Department of Materials Engineering, Kyonggi University)
  • 발행 : 2006.06.30

초록

세라믹소지에 발생하는 온도별 백화생성기구를 백화를 형성하는 양이온과 음이온을 분석하여 규명하였다. 백화가 발생된 세라믹 소지의 표면을 SEM과 EDS 분석을 하여 백화의 주 성분은 Ca와 S임을 확인하였다. 세라믹소지를 pH 7과 pH 10에서 각기 습식혼합 하였으며, 이때 여과된 액을 ICP와 IC 분석을 하여, 양이온 및 음이온 농도분석을 하였다. pH 7에서 제조된 세라믹 소지의 Ca 이온농도는 pH 10에서 제조된 세라믹소지의 Ca 이온농도의 8배 값을 보였으며, pH 10에서 제조된 세라믹소지는 $1100^{\circ}C$ 이상으로 소결된 소지에서도 백화가 발견되지 않았다.

The efflorescence mechanism of ceramic bodies with different sintering temperature was studied by quantitative analysis for the effect of various metal ions and anions. SEM and EDS characterization for efflorescence formed on the surface of the ceramic body showed that the main components of the efflorescence were Ca and S atoms. Leaching concentrations of various metal ions and anions for the ceramic bodies prepared by wet mixing with pH 7 and pH 10 were evaluated by ICP and IC analysis. The results of leaching test showed that the concentration of Ca ion at pH 7 body was eight times more than that of pH 10 body. Ca-rich efflorescence was not formed on the surface of ceramic body which prepared at pH 10 and sintered over $1100^{\circ}C$.

키워드

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