Hydrothermal-Assisted Cold Sintering Process: A New Guidance for Low-Temperature Ceramic Sintering
Hydrothermal-Assisted Cold Sintering Process: A New Guidance for Low-Temperature Ceramic Sintering
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DOI：
10.1021/acsami.6b07481
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发表时间：
2016-08-17
影响因子：
9.5
通讯作者：
Randall, Clive A.
中科院分区：
文献类型：
--
作者：
Guo, Hanzheng;Guo, Jing;Randall, Clive A.
烧结是一种热处理工艺，通常用于在低于熔化温度下从颗粒材料获得致密的块状固体。多晶陶瓷的常规烧结通常在相当高的温度下进行，对于大多数陶瓷材料，通常为1000至1200摄氏度，通常为熔化温度的50%至75%。在这里，我们提出了一种新的烧结路线，以实现在非常低的温度下致密的陶瓷。这种方法基本上是从我们最近开发的冷烧结工艺（CSP）修改而来的，具体地将水热前体溶液并入颗粒中。BaTiO 3纳米多晶陶瓷由于其技术上的重要性和常规烧结工艺中的高温烧结而被举例说明。所提出的技术还可以通过使用水或挥发性溶液的水热合成扩展到比之前所展示的更广泛的材料系统。这种方法具有重要意义，因为它为具有成本效益的无机加工提供了化学路线图，可以实现广泛的实际应用。
Sintering is a thermal treatment process that is generally applied to achieve dense bulk solids from particulate materials below the melting temperature. Conventional sintering of polycrystalline ceramics is prevalently performed at quite high temperatures, normally lip to 1000 to 1200 degrees C for most ceramic materials, typically 50% to 75% of the melting temperatures. Here we present a new sintering route to achieve dense ceramics at extraordinarily low temperatures. This method is basically modified from the cold sintering process (CSP) we developed very recently by specifically incorporating the hydrothermal precursor solutions into the particles. BaTiO3 nano polycrystalline ceramics are exemplified for-demonstration dire to their technological importance and normally high processing temperature under conventional sintering routes. The presented technique could also be extended to a much broader range of material systems than previously demonstrated-via a hydrothermal synthesis using water or volatile solutions. Such a methodology is of significant importance, because it provides a chemical roadmap for cost-effective inorganic processing that can enable broad practical applications.