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首页> 外文会议>International Conference on Advanced Ceramics and Composites >ADJUSTMENT OF PROCESS PARAMETERS FOR ATTAINING A DENSE GADOLINIUM- DOPED CERIA LAYER FOR THE PRODUCTION OF MICROTUBULAR SOFC CELLS
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ADJUSTMENT OF PROCESS PARAMETERS FOR ATTAINING A DENSE GADOLINIUM- DOPED CERIA LAYER FOR THE PRODUCTION OF MICROTUBULAR SOFC CELLS

机译：用于达到致密钆掺杂的二氧化铈层的过程参数的调整，用于生产微管SOFC细胞

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摘要

The objective of the experimental investigations presented here was the development of a dense chemical reaction blocking layer (CRBL) from commercially available gadolinium-doped ceria (GDC) powders deposited by dip coating onto microtubular solid oxide fuel cells (SOFC). The preparation of suspensions as well as the process of sintering was adjusted. The results indicate that the layer properties are essentially determined by the width of the particle size distribution (PSD) - apart from the colloidal stability. Two methods were applied for achieving narrow size distribution additional to dispersion: grinding and centrifugation for achieving a narrow PSD width. As a result, the particles could be sintered together even at 1300°C and a layer with a density close to 99% could be reached. In contrast, simple ultrasonic dispersion of powders diminished the distribution width insufficiently and gave porous layer even at 1600°C . Furthermore, experiments at the sintering process showed that particles with the narrowest original PSD can be sintered at lower temperature than others with a broader PSD.
机译：本文呈现的实验研究的目的是通过浸涂沉积在微管固体氧化物燃料电池（SOFC）上的市售钆掺杂的二氧化铈（GDC）粉末的致密化学反应阻断层（CRBL）的发展。调节悬浮液以及烧结过程的制备。结果表明，层性质基本上由粒度分布（PSD）的宽度决定 - 除了胶体稳定性。施加两种方法以实现窄尺寸分布，以额外的分散方式：研磨和离心以实现窄的PSD宽度。结果，即使在1300℃下也可以将颗粒烧结在一起，并且可以达到密度接近99％的层。相反，粉末的简单超声波分散在分布宽度下降不充分并且即使在1600℃下也会产生多孔层。此外，烧结过程的实验表明，具有最窄原始PSD的颗粒可以在比具有更宽的PSD的更低的温度下烧结。

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