Achieving Super‐Metallophobicity on Silicon‐based Ceramics at High Temperature

As a critical concept in physical chemistry, superwettability is widely concerned in both fundamental science and practical engineering in past few decades. Despite this, investigation on high temperature superwettability is still a void, which is significant both in scientific and industrial fields. Herein, a ceramic with specific high temperature non‐wetting property, Si2N2O is proposed. Compared with other materials, Si2N2O is elucidated with better practical non‐wetting property against various non‐ferrous metals. Combining with micro‐nanostructures, the metallophobicity is further improved (contact angle >150° and contact angle hysteresis ≈0°). The extraordinary metal repellency is defined as “super‐metallophobicity”, which is proved to be induced by distinctive thermodynamic and dynamic wetting behavior on the rough surface. The research of super‐metallophobicity not only sheds light on superwettability at high temperature, but also offers worthy insights for future potential material design in a wide range of applications, such as metallurgy, 3D printing and semiconductor industry. Super‐metallophobivity is achieved on silicon‐based ceramics at high temperature by various non‐ferrous molten metals (T> 523 K). The extraordinary property is induced by distinctive thermodynamic and dynamic wetting behavior on micro‐nanostructured surface of Si2N2O, which offers worthy insights for expansive applications such as metallurgy, 3D printing and semiconductor industry and so on.