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Recent content by jtem

  1. jtem

    Aluminum vs. ethanol

    IFRs, thanks. I will try to find this reference. About the mixtures, which I used to mill, I am suspecting that there is chemical interaction between fresh surfaces of aluminum and absolute ethanol with liberation of water. However, I could not find a reaction mechanism between these compounds.
  2. jtem

    Aluminum vs. ethanol

    I have attrition milled aluminum (Al) and alumina (Al2O3) mixtures in absolute ethanol. After that checked water content by Carl-Fischer titration method and revealed that it contains higher water (hydroxyl) content than those milled in ethanol which contains(5-10%)water. Water content was...
  3. jtem

    porous ceramic

    Hello, One of suitable method for obtaining porous materials is so called selective leaching method. As may you knows a clay minerals consist from layered structure ( tetrahedral silica and octahedral alumina or magnesium). If you treat them in suitable conditions by acid or base respective...
  4. jtem

    Al2O3: Relationship between grain size and density?

    Hi Johnrh, Grain size of sintered ceramics can be determined by SEM. From my experience better to use thermal etching just 50-100C below those used for your sintering. Time should be no more than 1h, it is just removing grain boundary stress. Use as possible more grains and take average.
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