A Set of high Power microwave heating system was established by the authors,which could be used in joining of ceramic materials. The key part of the system is its single-mode resonant cavity. The behaviour of heating...A Set of high Power microwave heating system was established by the authors,which could be used in joining of ceramic materials. The key part of the system is its single-mode resonant cavity. The behaviour of heating materials is largely depend on the characteristics of resonant cavity, dielectric loss of materials, geometric factors of sample and incident microwave power. In order to better understand and control the heating process of dielectric materials bonding, numerical analysis of the heating processes of AL2O3 and Si3N4 ceramics heated in a TE10n single mode cavity was performed and some results useful for making practical heating procedures were obtained.展开更多
Structure/property regulation is widely investigated for providing theoretical foundations and guidance for designing microwave dielectric ceramics.P–V–L bond theory targets the provision of detailed structural para...Structure/property regulation is widely investigated for providing theoretical foundations and guidance for designing microwave dielectric ceramics.P–V–L bond theory targets the provision of detailed structural parameters of crystals and fundamental chemical bond characteristics,such as bond ionicity,bond covalency and bond susceptibility.In this review,the concept of P–V–L bond theory,the binary bonding formula theory of complex polycrystalline and the usage of P–V–L bond theory regarding the structural effects on dielectric properties in various crystal structures are introduced.And the bond traits provided via P–V–L bond theory in several ion-doping modification systems are generalized with structural evolution and dielectric properties.Furthermore,conjectures about the development and application directions of P–V–L bond theory in the study of structure/properties of microwave dielectric ceramics are put forward.展开更多
文摘A Set of high Power microwave heating system was established by the authors,which could be used in joining of ceramic materials. The key part of the system is its single-mode resonant cavity. The behaviour of heating materials is largely depend on the characteristics of resonant cavity, dielectric loss of materials, geometric factors of sample and incident microwave power. In order to better understand and control the heating process of dielectric materials bonding, numerical analysis of the heating processes of AL2O3 and Si3N4 ceramics heated in a TE10n single mode cavity was performed and some results useful for making practical heating procedures were obtained.
基金supports from the NationalNatural Science Foundation of China(Grant.51872037).
文摘Structure/property regulation is widely investigated for providing theoretical foundations and guidance for designing microwave dielectric ceramics.P–V–L bond theory targets the provision of detailed structural parameters of crystals and fundamental chemical bond characteristics,such as bond ionicity,bond covalency and bond susceptibility.In this review,the concept of P–V–L bond theory,the binary bonding formula theory of complex polycrystalline and the usage of P–V–L bond theory regarding the structural effects on dielectric properties in various crystal structures are introduced.And the bond traits provided via P–V–L bond theory in several ion-doping modification systems are generalized with structural evolution and dielectric properties.Furthermore,conjectures about the development and application directions of P–V–L bond theory in the study of structure/properties of microwave dielectric ceramics are put forward.
