Developments of Innovative Environmental-friendly process using Local Selective Reaction Control through the Microwave Technique

提出了一种微波辐照颗粒表面水化成形陶瓷的新工艺。在这个过程中，用微波照射一个绿体，可以增强水和颗粒表面之间的水化反应，产生紧密结合在一起的相邻颗粒的表面三氢氧化铝结构。该工艺提高结合强度的关键是增强表面水化反应。在本研究中，我们研究了机械表面处理对氧化铝粉末表面微波吸收性能的影响。行星球磨机表面处理提高了氧化铝粉末的介电损耗，从而有效地进行了表面处理粉末的微波吸收。认为处理后的粉末表面局部受热，促进了粉末表面水化反应，提高了坯体的力学性能。

We developed a novel ceramic forming process by surface hydration of particles through microwave irradiation. In this process, irradiating a green body with microwaves enhances the hydration reaction between water and particle surfaces, creating surface aluminum trihydroxides structure of adjacent particles that bind together tightly. The key point of improvement in binding strength on this process was enhancement of surface hydration reaction. In this research, we investigated that effects of mechanical surface treatment on the microwave absorption properties of alumina powder surfaces. The dielectric loss of alumina powder was increased by the surface treatment using planetary ball mill, as a result, the microwave absorption of surface treatment powders was carried out effectively. It was considered that treated powders surface was heated locally and it is thought that a hydration reaction of powder surfaces was promoted and mechanical property of green body was improved.