In-situ synthesis of mullite-SiCw composite ceramics in Li2O-Al2O3-SiO2 ternary system for solar heat transmission pipeline
In-situ synthesis of mullite-SiCw composite ceramics in Li2O-Al2O3-SiO2 ternary system for solar heat transmission pipeline
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原位合成Li2O-Al2O3-SiO2三元系莫来石-SiCw复合陶瓷用于太阳能传热管道
DOI：
10.1016/j.jallcom.2018.12.364
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发表时间：
2019-04
影响因子：
6.2
通讯作者：
Ren Lu
中科院分区：
文献类型：
--
作者：
Lao Xinbin;Xu Xiaoyang;Jiang Weihui;Liang Jian;Cheng Hao;Liang Lingfeng;Liu Jianfeng;Ren Lu
在Li 2 O-Al 2 O3-SiO2三元体系中原位合成纳米SiC晶须（nano-SiCw），制备了高致密莫来石-SiCw复合陶瓷，用于太阳能热输送管道。探讨了三元体系中原位合成纳米SiC的机理，研究了纳米SiC对复合材料性能的影响。结果表明，Li 2 O-Al 2 O3-SiO2三元体系中纳米SiC晶须的生长过程以液-固（LS）机理为主，Li 2CO 3的加入可以通过增加液相含量和降低液相粘度来提高SiC晶须的产率。在1440 °C下烧结的样品BS 3（具有2.22wt%Li2CO3添加剂）获得了47.9%的最高SiC含量。直径为20-30 nm的纳米SiC晶须与棒状莫来石晶体相互咬合，提高了复合材料的力学性能，其中1420 °C烧结的试样BS 1的抗弯强度最高，达到115.4 MPa。原位合成的SiCw对提高复合材料的热物理性能也有明显的作用，样品BS 1的热导率是未引入纳米SiCw的空白样品B1的3.6倍。
Nano-SiC whiskers (nano-SiCw) were in-situ synthesized in Li2O-Al2O3-SiO2ternary system for preparing highly densified mullite-SiCwcomposite ceramics used for solar heat transmission pipeline. Mechanisms on the in-situ synthesis of nano-SiCwin the ternary system were investigated and the impact of nano-SiCwon the performances of the composites had been studied. Results showed that the growth processes of nano-SiC whiskers in Li2O-Al2O3-SiO2ternary system were dominated by liquid-solid (LS) mechanism and the Li2CO3additive could improve the SiCwyield through increasing the content of liquid phase and lowering the liquid viscosity. Sample BS3 (with 2.22 wt% Li2CO3additive) sintered at 1440 °C obtained the highest SiC content of 47.9%. Nano-SiC whiskers with a diameter of 20–30 nm were interlocking with rod-like mullite crystals to improve the mechanical properties of the composites, and sample BS1 sintered at 1420 °C showed the highest bending strength of 115.4 MPa. The in-situ synthesized SiCwalso shew significant effects on improving the thermophysical properties of the composites and sample BS1 exhibited a 3.6 times higher thermal conductivity than that of blank sample B1 without the introduction of nano-SiCw.
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影响因子：
3.9
作者：
C. Bagci;Gregory P. Kutyla;Kevin C. Seymour;W. Kriven
通讯作者：
C. Bagci;Gregory P. Kutyla;Kevin C. Seymour;W. Kriven
影响因子：
0.5
作者：
Ryan S. Winburn;Dean G. Grier;G. Mccarthy;R. B. Peterson
通讯作者：
Ryan S. Winburn;Dean G. Grier;G. Mccarthy;R. B. Peterson
影响因子：
5.2
作者：
Xiaohong Xu;Yinfeng Zhang;Jianfeng Wu;Cheng Hu;Chenglong Lu;Dongbin Wang
通讯作者：
Xiaohong Xu;Yinfeng Zhang;Jianfeng Wu;Cheng Hu;Chenglong Lu;Dongbin Wang
影响因子：
6
作者：
Xin Zhang;Zhi Wang;Peitao Hu;W. Han;C. Hong
通讯作者：
Xin Zhang;Zhi Wang;Peitao Hu;W. Han;C. Hong
影响因子：
2.3
作者：
Goods, SH;Bradshaw, RW
通讯作者：
Bradshaw, RW