Oxide fibers preparation and manufacturing capabilities at Fraunhofer‐Center HTL are introduced, showing the development and preparation of oxide ceramic fibers from lab scale to pilot scale up to near production scale. As a specific example, the development of an aluminosilicate fiber with mullite composition is discussed in more detail. Fiber development started from nonaqueous sol‐gel precursors in the early lab scale. With increasing fiber spinning volume, precursors were switched to water‐soluble systems. Transformation from green fiber to ceramic fiber was monitored by thermogravimetric and differential thermal analysis, X‐ray diffraction, and scanning electron microscopy. The evolution of ceramic phases, microstructure formation, and the effects on tensile strength and Young's modulus were investigated. Weibull statistics and fracture analysis helped to understand the results. Next step will be the transition from large lab scale to pilot scale, demonstrating manufacturing capability.

中文翻译：

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通过干纺工艺氧化陶瓷纤维-从实验室到制造厂

介绍了Fraunhofer-Center HTL的氧化物纤维的制备和制造能力，展示了从实验室规模到中试规模直至接近生产规模的氧化物陶瓷纤维的开发和制备。作为一个具体实例，将更详细地讨论具有莫来石组成的硅铝酸盐纤维的开发。纤维的开发从实验室初期的非水溶胶凝胶前体开始。随着纤维纺丝量的增加，前体被转换为水溶性系统。通过热重分析和差热分析，X射线衍射和扫描电子显微镜监测从生纤维到陶瓷纤维的转变。研究了陶瓷相的演变，微观结构的形成以及对拉伸强度和杨氏模量的影响。Weibull统计数据和断裂分析有助于理解结果。下一步将是从大型实验室规模向中试规模的转变，从而证明制造能力。