由醋酸锆前驱体制备ZrO_2连续纤维的过程及研究

为了制得耐高温、高强度的氧化锆连续纤维，利用新制醋酸锆作为前驱体，通过溶胶－凝胶法合成含有Ｚｒ－Ｏ长链的溶胶，干法纺丝，制备ＺｒＯ２连续纤维．研究了醋酸锆的光谱和热学性质，并对烧结后的纤维做扫描电镜观察、ＸＲＤ分析和纤维抗拉强度的测试．测试结果表明醋酸锆前驱体溶胶中含有以Ｚｒ－Ｏ为骨架的长链，具有良好的可纺性和稳定性．直径在十几个微米以下的连续纤维具有一定的强度和韧性，添加 ５ｍｏｌ％的 Ｙ２Ｏ３可将 ＺｒＯ２的晶相稳定在四方相．

Process and Study on Preparation of Continuous Zirconia Fibres from Zirconia Acetate

In order to obtain continuous zirconia fibres with high melting point and mechanical properties, newly-produced zirconium acetate was used as a precursor to synthesize a sol containing Zr-O chains by a sol-gel process and continuous zirconia fibres were produced by dry spinning. The spectral and thermal properties of zirconium acetate were studied. The sintered fibres were observed by SEM, and their XRD results analyzed, while their tensile strength tested. The results show that a long chain of Zr-O bond exists in zirconium acetate precursor and the sol has good spinnability and stability. The obtained fibres with diameter under 20um have certain tensile strength and toughness. 5mol% Y-doping is effective on stabilizing the tetragonal phase of zirconia.