単分散ジルコニア懸濁液からのジルコニア及びイットリア安定化ジルコニア繊維の形成
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概要
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Unstabilized and yttria stabilized ZrO_2 fibers were prepared from a monodispersed ZrO_2 particles derived from hydrolysis of Zr (OBu)_4. Unstabilized ZrO_2 fibers with 71 to 151μm of width and yttria stabilized ZrO_2 fibers with 96 to 214μm of width, were formed by drying the ethanol suspension of monodispersed ZrO_2 particles with 116nm in mean diameter. The morphology of the ZrO_2 fibers were plate like and consisted of densely packed ZrO_2 nano particles. The preparation conditions affected the fiber width. This was due to the lower concentration of ZrO_2 particles in suspension, or the higher drying temperatures, which gave the narrower fiber width. The mean particle size of the 5mol% Y_2O_3 doped ZrO_2 fiber heat treatment at 1473K was 0.14μm and the fiber showed 11.0 GPa on the Vickers Hardness Test.
- 2006-07-01