Cold sintering and co-firing of a multilayer device with thermoelectric materials
Cold sintering and co-firing of a multilayer device with thermoelectric materials
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DOI：
10.1111/jace.14852
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发表时间：
2017-08-01
影响因子：
3.9
通讯作者：
Randall, Clive A.
中科院分区：
文献类型：
--
作者：
Funahashi, Shuichi;Guo, Hanzheng;Randall, Clive A.
冷烧结ZnO和Ca3Co4O9多晶材料具有与传统烧结陶瓷相当的热电性能。将这些加工条件扩展到冷烧结共烧陶瓷（CSCC）技术中，我们集成了n型和p型热电氧化物以及分离的绝缘层，以演示功能性多层热电发生器器件。采用8mol %氧化钇稳定氧化锆（8YSZ）绝缘层共烧结构，制备了5 n-p结（20层）多层热电发电机（TEG）。在共烧冷烧结条件下，对不同材料界面的透射电镜分析表明，在各陶瓷相之间2.0 μ m的界面区域内存在化学成分的相互扩散。多层陶瓷和聚合物结构的共烧也显示出可能使用聚四氟乙烯（PTFE）热塑性层的绝缘层。这证明了陶瓷和聚合物新结构的单步工艺的可行性，为许多新设备设计开辟了新的方向。
Cold-sintered ZnO and Ca3Co4O9 polycrystalline materials were shown to have thermoelectric properties comparable to those of conventionally sintered ceramics. Extending these processing conditions into a cold sintering co-fired ceramic (CSCC) technology, we integrated n-type and p-type thermoelectric oxides and a separating insulating layer to demonstrate functional multilayer thermoelectric generator devices. A co-fired structure with an insulating 8 mol% yttria-stabilized zirconia (8YSZ) layer enabled multilayer thermoelectric generators (TEG) to be fabricated with a 5 n-p junction device (20 layers). A transmission electron microscopy analysis of the interfaces between the various materials under the co-firing cold sintering showed some interdiffusion of chemical constitutes in a 2.0 mu m interface region between the respective ceramic phases. The co-firing of multilayer ceramic and polymer structures were also shown to be possible using insulation layers of polytetrafluoroethylene (PTFE) thermoplastic layers. This demonstrated the feasibility of a single-step process for new structures with both ceramics and polymers, opening up new directions for many new device designs.