Preparation of BN@SiO2 nanofiber ceramic aerogel with ultralight, wave-transparent and heat-insulating for microwave sintering furnace

被引：1

作者：

Song, Zijie ^{[1
]}

Zhang, Fan ^{[1
,3
]}

Jiang, Kexin ^{[1
]}

Fan, Bingbing ^{[1
]}

Wang, Hailong ^{[1
]}

Zhang, Rui ^{[1
]}

Li, Hongxia ^{[1
,2
]}

Chen, Yongqiang ^{[1
]}

机构：

[1] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China

[2] Sinosteel Luoyang Inst Refractories Res Co Ltd, Luoyang 471039, Henan, Peoples R China

[3] Henan Acad Sci, Zhengzhou 450046, Henan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2024年 / 50卷 / 16期

关键词：

BN@SiO 2 aerogel; Ultralight; Wave-transparent materials; Dielectric properties; Microwave sintering; Ceramic materials; DIELECTRIC-PROPERTIES;

D O I：

10.1016/j.ceramint.2024.05.381

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Thermal insulation devices play an extremely important role in enhancing microwave heating efficiency. However, existing wave-transparent insulation materials often exhibit high heat storage, low microwave transmittance at high temperatures, and poor oxidation and thermal shock resistance, hindering hightemperature applications for microwave sintering. To address this issue, we developed an ultralight and wavetransparent BN@SiO2 aerogel, which was fabricated through the in situ growth of SiO2 on the surfaces of BN fibers. The resulting composite aerogel demonstrated excellent high-temperature oxidation resistance and an impressively low density of 0.07 g/cm3. Furthermore, the dielectric constant of the BN@SiO2 aerogel ranged from 2.58 to 2.80, and its dielectric loss tangent was as low as 5.13 x 10- 3-7.98 x 10-3 within the 2-10 GHz frequency range. The successful synthesis of BN@SiO2 aerogel provides new progress and research ideas for the development of wave transparent and thermal insulation materials.

引用

页码：34519 / 34526

页数：8