Silicate–CoNi–carbon triple shell sandwich structured composite hollow microspheres with low density boosted microwave absorption and high mechanical strength

Author(s):  
Zhenguo An ◽  
Jingjie Zhang

Low density silicate–CoNi–carbon triple shell hollow microspheres with high mechanical strength and controllable electromagnetic properties were prepared on a large scale.

2016 ◽  
Vol 45 (7) ◽  
pp. 2881-2887 ◽  
Author(s):  
Zhenguo An ◽  
Jingjie Zhang

Silica–nickel–carbon composite microspheres with shelly hollow structures and tunable electromagnetic properties were prepared in large scale through a three-step route.


RSC Advances ◽  
2016 ◽  
Vol 6 (52) ◽  
pp. 47089-47095 ◽  
Author(s):  
Bin Liao ◽  
Zhenguo An ◽  
Jingjie Zhang

Novel fast dehydration–combustion route to glass-γ-Fe2O3 double shell composite hollow microspheres with low density and tunable magnetic properties.


RSC Advances ◽  
2015 ◽  
Vol 5 (7) ◽  
pp. 5197-5204 ◽  
Author(s):  
Kang Guo ◽  
Zijun Hu ◽  
Huaihe Song ◽  
Xian Du ◽  
Liang Zhong ◽  
...  

SEM and TEM pictures show that GNSs can be well-dispersed in a carbon matrix. The resultant composite CAs exhibited high compression strength and extremely low thermal conductivity of 0.028 W m−1 K−1.


2016 ◽  
Vol 18 (40) ◽  
pp. 28297-28306 ◽  
Author(s):  
Hui Zhang ◽  
Yuqi Li ◽  
Yaoguang Xu ◽  
Zexiang Lu ◽  
Lihui Chen ◽  
...  

To deal with marine oil spillage and chemical leakage issues, a highly efficient absorbent (cellulose based aerogel) with a low density (ρ < 0.034 g cm−3, φ > 98.5%) and high mechanical strength was fabricated via a novel physical–chemical foaming method, plasma treatment and subsequent silane modification process.


2012 ◽  
Vol 22 (21) ◽  
pp. 10883 ◽  
Author(s):  
Xun Xu ◽  
Liping Heng ◽  
Xiaojuan Zhao ◽  
Jie Ma ◽  
Ling Lin ◽  
...  

Author(s):  
Ran Liu ◽  
Gaiping Du ◽  
Bin Liao ◽  
Weixin Xiao ◽  
Zhenguo An ◽  
...  

Due to their multiple dissipation mechanisms, low density and easy tailored impedance matching, heterogeneous hollow structures are promising candidates for microwave absorbents towards wideband absorption and lightweight design. In this...


1994 ◽  
Vol 372 ◽  
Author(s):  
Valery M. Dorogotovtsev

AbstractLasting storage of hydrogen, its isotopes and other gases under high (1–2 thousand atm) pressure inside hollow microspheres as well as production of low-density syntaxis poroplasts to withstand high external loads - all these need hollow microspheres of high mechanical strength. By modern commercial technology the microspheres are mainly obtained from water- soluble alkali-silicate or alkali-boro-silicate glasses. These microspheres are not strong, their strength being 1000–1500 MPa.. Besides the low resistivity to hydrolysis and chemicals also restrict their applications. To gain strength 1.5–2 times higher the additional modification of microspheres is done either by leaching, or by annealing, or by ion exchange. Microspheres of stronger glasses being usually multi-component require a technology fitted to produce highly uniform glass [1,2].A new fabrication method is presented to produce hollow microspheres of various glasses. They include simple alkali and alkali-boro-silicate glasses as well as multi-component glasses of commercially available compositions, alkali-free, refractory, and high-strength glasses.


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