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首页> 外文期刊>Advanced Materials >What Happens during Thermal Post-Treatment of Powder Aerosol Deposited Functional Ceramic Films? Explanations Based on an Experiment-Enhanced Literature Survey
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What Happens during Thermal Post-Treatment of Powder Aerosol Deposited Functional Ceramic Films? Explanations Based on an Experiment-Enhanced Literature Survey

机译：在粉末气溶胶沉积功能陶瓷膜的热后处理过程中会发生什么？基于实验增强文学调查的解释

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摘要

Powder aerosol deposition (PAD) is a unique ceramic spray coating method that produces dense and well-adhering thick-films directly at room temperature, without requiring any heating or sintering. After the successful film formation, mechanical film properties like hardness or plasma resistance are remarkably good. However, when it comes to electrical properties like permittivity or electrical conductivity, the nanocrystalline structure of PAD films combined with high internal strains deteriorates partly the characteristic properties. The electrical conductivity may already be present within the as-deposited films. However, it is mostly lowered by several orders of magnitude. Therefore, a thermal post-deposition annealing is oftentimes required. In this work, electrically conducting films produced by powder aerosol deposition are surveyed based on published data. Their microstructural and electrical behavior during the post-deposition annealing treatment is summarized and reasons for the lowered electrical conductivity are identified. Additionally, the processes taking place during annealing, which eventually allow to regain bulk-like functional properties, are examined. A universal annealing behavior is found that leads to a quantitative recommendation for the suitable film annealing temperatures to regain the electrical conductivities.
机译：粉末气溶胶沉积（垫）是一种独特的陶瓷喷涂方法，可直接在室温下直接产生致密且良好地粘附，而不需要任何加热或烧结。在成功的成功形成之后，机械膜性能如硬度或血浆抗性显着良好。然而，当涉及介电常数或导电性等电性能时，垫膜的纳米晶体结构与高内部菌株组合的部分是特征性的。电导率可能已经存在于沉积的薄膜内。但是，它大多数幅度大部分降低。因此，需要热后沉积退火。在这项工作中，通过发布的数据进行调查通过粉末气溶胶沉积产生的导电膜。总结了它们在沉积后退火处理期间的微观结构和电动性能，并且鉴定了导电性降低的原因。另外，检查在退火期间发生的方法，最终允许重新摄取体状功能性质。发现通用退火行为，导致合适的薄膜退火温度的定量推荐，以重新获得电导率。

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