Electrophoretic deposition of sol-gel ceramic microcomponents using UV-curable alkoxide precursors
Electrophoretic deposition of sol-gel ceramic microcomponents using UV-curable alkoxide precursors
复制标题
使用紫外光固化醇盐前体电泳沉积溶胶-凝胶陶瓷微元件
DOI：
10.1016/s0955-2219(97)00120-9
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
G. Ernig
中科院分区：
文献类型：
--
作者：
J. Laubersheimer;H. Ritzhaupt‐Kleissl;J. Hauβelt;G. Ernig
提出了一种利用液态金属有机锆钛酸铅（PZT）前驱体直接制备压电陶瓷微件的方法。电泳沉积（EPD）被用来作为成型方法，前体的PZT溶胶合成的一种改进的溶胶-凝胶技术。在EPD进入微结构模具后，在溶胶凝胶化的同时，然后干燥沉积的凝胶体并移除模具，随后热解有机物并最终烧结。特别强调了前体的开发。通过在合成中引入可聚合的螯合剂，凝胶可以另外通过自由基聚合硬化。通过使用UV敏感引发剂，凝胶硬化可以通过光诱导聚合进行。所得的固体凝胶显示出比可比较的无机凝胶好得多的机械强度，这是由于凝胶中相互互穿的无机和有机网络而不仅仅是通过凝胶化建立的无机网络。
A process was developed, by which piezoceramic microparts can be produced directly using liquid metal-organic lead—zirconate—titanate (PZT) precursors. Electrophoretic deposition (EPD) was used as the shaping method; the precursors were PZT-sols synthesized by a modified sol-gel technique. After EPD into a microstruetured mould, simultaneous to the gelation of the sol, the deposited gel-body was then dried and the mould was removed, followed by pyrolysis of the organics and final sintering. Special emphasis was placed on the development of the precursor. By introducing polymerisable chelating agents into the synthesis, the gel can additionally be hardened by radical polymerisation. By using UV-sensitive initiators, the gel-hardening can be performed by photo-induced polymerisation. The resulting solid gel shows considerably better mechanical strength than comparable inorganic gels due to mutually interpenetrating inorganic and organic networks in the gel instead of just an inorganic network built up by gelation.