Spinodal decomposing glass ceramic with tailored porous, thermal and dielectric properties

具有定制多孔、热和介电性能的旋节线分解玻璃陶瓷

• 批准号: 282622404
• 负责人: Professor Dr. Dominique de Ligny
• 金额: --
• 依托单位: Institut für Sensor- und Aktuatorsysteme
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/282622404?language=en
• 关键词: Spinodal; decomposing; glass; ceramic; tailored

Within the project a novel glass-ceramic material will be developed providing a nanoscale porosity after a wet chemical leaching process. The material composition will be composed so that while a temperature treatment a spinodal decomposition occurs and an additional leachable phase originates. This material will be manufactured by a specific tape casting process. For that, the original material composition is conditioned as slurry and cast to a defined sheet thickness. The shape and size of the decomposed phases depends mainly on the annealing steps. By this procedure a homogeneous distribution of the occurring phase can be achieved. There are some suitable glasses for this process being investigated in Erlangen. After sintering the decomposed phase will be wet chemically etched and the degree of porosity can be adjusted. Depending on the porosity and the pore size a suitable thin film metallization will be investigated covering the pores and being suitable e.g. as heater element. For that, the film will be investigated with respect to its electrical performance and long term stability. As demonstrator, a Pirani pressure sensor will be manufactured, showing the low thermal conductivity and suitability of these materials for the applicability within sensors. Additionally, the permittivity of the material will be investigated as further interesting property of porous dielectric materials.

在该项目中，将开发一种新型玻璃陶瓷材料，在湿化学浸出过程后提供纳米级孔隙率。材料成分的组成应确保在温度处理时发生亚稳分解，并产生额外的可沥滤相。该材料将通过特定的流延工艺制造。为此，将原始材料组合物调节为浆料，并浇铸成规定的板材厚度。分解相的形状和尺寸主要取决于退火步骤。通过该过程，可以实现出现的相的均匀分布。埃尔兰根正在研究一些适用于这一过程的玻璃。烧结后，分解相将被湿法化学蚀刻，并且孔隙度可以调节。根据孔隙率和孔径，将研究覆盖孔并适合例如作为加热器元件的合适的薄膜金属化。为此，将研究薄膜的电气性能和长期稳定性。作为示范，皮拉尼压力传感器将被制造，显示低导热性和适用性的传感器内的适用性，这些材料。此外，材料的介电常数将作为多孔介电材料的进一步有趣的性质进行研究。

项目成果

Wet-chemical porosification of LTCC substrates: Dissolution mechanism and mechanical properties

• DOI: 10.1016/j.micromeso.2019.109593
• 发表时间: 2019-11-01
• 期刊: MICROPOROUS AND MESOPOROUS MATERIALS
• 影响因子: 5.2
• 作者: Hajian, Ali;Brehl, Martin;Schmid, Ulrich
• 通讯作者: Schmid, Ulrich

Tailored and deep porosification of LTCC substrates with phosphoric acid

• DOI: 10.1016/j.jeurceramsoc.2019.04.026
• 发表时间: 2019-08
• 期刊: Journal of the European Ceramic Society
• 影响因子: 5.7
• 作者: A. Hajian;S. Smetaczek;Christopher Zellner;M. Stöger-Pollach;T. Konegger;A. Limbeck;U. Schmid

On the porosification of LTCC substrates with sodium hydroxide

• DOI: 10.1016/j.compositesb.2018.08.071
• 发表时间: 2019-01
• 期刊: Composites Part B: Engineering
• 作者: A. Hajian;Doruk Müftüoglu;T. Konegger;M. Schneider;U. Schmid

Porosification behaviour of LTCC substrates with potassium hydroxide

• DOI: 10.1016/j.jeurceramsoc.2018.01.017
• 发表时间: 2018-05
• 期刊: Journal of The European Ceramic Society
• 影响因子: 5.7
• 作者: A. Hajian;M. Stöger-Pollach;M. Schneider;Doruk Müftüoglu;Frank K. Crunwell;U. Schmid