AlN陶瓷具有较高的热导率，但是介电常数和介电损耗尚不能满足大功率微波

AlN ceramic has high thermal conductivity, but the dielectric constant and dielectric loss can not meet the requirements of high-power microwave output window. <br>The h-BN ceramic has a lower dielectric constant and dielectric loss, and the introduction of part of h-BN in AlN ceramic is expected to prepare materials that meet the requirements of high-power microwave output windows. <br>In this thesis, CaF2 and YF3 are used as sintering aids, and the hot-press sintering process is used to prepare h-BN/AlN composite ceramics. The effects of sintering temperature, sintering aid dosage, holding time and pressure system on their properties are explored.

AlN ceramichas has a high thermal conductivity, but dielectric constants and dielectric losses can not meet the requirements of high-power microwave output window.<br>H-BN ceramics have a low dielectric constant and dielectric loss, and the introduction of part of h-BN into AlN ceramics is expected to produce materials that meet the requirements of high-power microwave output windows.<br>In this paper, CaF2 and YF3 are sintered additives, and the hot-pressure sintering process prepares h-BN/AlN complex ceramics, and explores the effects of sintering temperature, sintering aid dosage, insulation time and pressure system.

AlN Ceramics have high thermal conductivity, but the dielectric constant and dielectric loss can not meet the requirements of high power microwave output window.<br>H-BN ceramics have low dielectric constant and dielectric loss. The introduction of h-BN into AlN Ceramics is expected to produce materials that can meet the requirements of high power microwave output window.<br>In this paper, CaF2 and yf3 were used as sintering aids to prepare h-BN / AlN composite ceramics by hot pressing sintering process, and the effects of sintering temperature, amount of sintering aids, holding time and pressure system on their properties were investigated.