ジルコノキサン化合物を前駆体とするZrO_2-Y_2O_3連続長繊維の調製

概要

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The acid catalyzed hydrolysis of bis (ethyl acetoacetato) zirconium diisopropoxide [(etac)_2Zr(OPr^i)_2; EZP] in methanol followed by concentration of the reaction mixture gave a polyzirconoxane (PZO) solution which showed excellent spinnability and very remarkable stability to self-condensation as not to gel for more than one year. A 3.0 mol% Y2_O_3-containing solution (Y-PZO) was prepared by addition of tris (acethyl acetonato) yttrium [Y(acac)_3] to PZO solution without changing spinnability and stability. Dry spinning of the Y-PZO solution provided continuous pale yellow precursor fibers of 10-30 μm diameter with circular or ellipsoidal cross sections. Continuous ZrO_2-Y_2O_3 fibers of 10-13 μm diameter with a tensile strength of about 1 GPa were obtained by sintering precursor fibers at 1200℃ (2℃/min) for 1 h after steam treatment.
1993-03-01