Effect of boron nitride nanosheets addition on the mechanical and dielectric properties of magnesium oxide ceramics

The effect of boron nitride nanosheets on the mechanical and thermal properties of aluminum nitride ceramics

“…As shown in Figure 3, there are the FESEM and energy spectrum images of the fracture of AlN sample after adding BNNSs. Figure 3A is an FESEM image of the fracture surface, which can be clearly seen that the flake material is distributed in AlN 24,26 . Figure 3B shows that there is no Al element in the area of the flaky structure, whereas the distribution of N element is relatively uniform in the fracture surface in Figure 3C.…”

“…With the increase of BNNSs contents, it can be seen that the distribution of BNNSs is more and more serried, and there are more BNNSs in Figure 4D. However, BNNSs did not produce large‐scale accumulation due to the small amount of doping 24 . Most of the BNNSs are distributed in the grain boundaries in thin sheets, and a small part of the BNNSs is located inside the grains.…”

“…BNNSs were obtained by a mixed‐solvent exfoliation method 18,24 . The raw powders were mixed by ball‐milling in alcohol for 10 h, containing AlN powders (Tokuyama Co., Tokyo, Japan) and BNNSs with a different content from 0 to 1.5 wt%.…”

“…BNNSs were obtained by a mixed-solvent exfoliation method. 18,24 The raw powders were mixed by ball-milling in alcohol for 10 h, containing AlN powders (Tokuyama Co., Tokyo, Japan) and BNNSs with a different content from 0 to 1.5 wt%. In addition, to promote the densification of sintering process, 2 wt% of Y 2 O 3 and that of CeO 2 (Aladdin Bio-Chem Technology Co., Ltd, China) were both added in the powders as sintering aids.…”

“…After years of research, the preparation method of BNNSs has become mature, 18,22 and BNNSs have been more and more widely used. [23][24][25][26] However, at the moment, there is no similar report about the preparation of composite materials by incorporating BNNSs into AlN ceramics.…”