Adhesive is an important part of ceramic-metal composite armor. In order to obtain excellent ballistic performance, some adhesive with a variety of content of nano-SiO2 was prepared, and mechanical properties and ballistic test were conducted. The results show that the pores in adhesive decrease the strength of the adhesive, and the fracture happens along with the pores. To add nano-SiO2 in adhesive can decrease the porosity and the scale of the pores. In the ballistic performance, the adhesive enhance the acoustic impedance, the greater acoustic impedance can increase the energy of transmission wave and decrease the energy of reflection wave, leading to that the ceramic is destroyed slightly. The targets with adhesive added in 20% nano-SiO2 express the best anti-bullet properties. There are so many big blocks left in targets and the height of back convex is only 2.36mm.
Two new complexes, [Eu 2 (NIPH) 2 (H 2 O) 14 ](HNIPH) 2 (H 2 O) 7 (1) [Co 2 (abtc)(phen) 4 (H 2 O)]Á12(H 2 O) (2) (H 2 NIPH = 5-nitroisophthalic acid, H 4abtc = 3,3 0 ,5,5 0 -azobenzenetetracarboxylic acid, phen = 1,10-phenanthroline, DMF = N,N 0 -dimethylformamide) have been synthesized and characterized by infrared spectrum, thermal gravimetric analysis, X-ray single crystal diffraction and photoluminescence properties. Complex 1 upon slow evaporation at room temperature gave a 0-D structure, and seven independent water molecules and their equivalent held together by hydrogen bonds with an ordered proton arrangement form a 1-D hydrogen-bonded water tape. An unusual water tape notated T10(0)A0 is observed in 2. A 1-D water tape by connecting five-ten-five membered water rings through hydrogen bonds. Multiple hydrogen bonds and p-p stacking interactions play important roles in the formation of the 3-D networks. Fascinatingly, these lattice water molecules display unprecedented water cluster and play important roles in the stabilizing the whole network.Keywords 5-Nitroisophthalic acid Á 3,3 0 ,5,5 0 -Azobenzenetetracarboxylic acid Á Water cluster Á Fluorescence Electronic supplementary material The online version of this article (
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