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Application of glass microspheres

2014-11-17 04:35:32 1928

Nano-absorbing particle composite hollow glass microspheres can be obtained with the ideal composite absorber, this aspect of the characteristics of the microspheres can be used to make nanoparticles are uniformly dispersed in the matrix, it is difficult to solve the problem of fragmentation, the nano-suction Potter of full play, it also significantly reduced gram weight of the absorbent. Some researchers have proposed the use of chemical vapor deposition method for hollow glass microsphere beads were plated iron. Because metallic iron itself is a magnetic material has a certain conductivity and permeability at high frequency electromagnetic field, the iron layer will cause some eddy current loss and magnetic loss, the material has an absorption loss for electromagnetic effects. Further, the hollow microspheres must be attached to the surface thickness of metallic iron, making it permeable electrically conductive pellets. When these small balls in the filling amount of the substrate reaches a higher proportion of the probability of contact between the particles increases, the microstructure is conducive to the formation of the conductive network and thus also the energy loss caused by electromagnetic fields. The experimental results show that the researchers, the modified hollow microspheres have better absorbing properties. Within 8 ~ 18GHz frequency sweep test range, less than -10dB in the frequency range 17.2 ~ 18GHz, maximum absorption of up -11.27dB, corresponding to a frequency of 18GHz.
In the field of environment, the photocatalyst applications prominent problem is that the amount of large, difficult to separate from the treatment solution. By its load at a good solution to these problems can be hollow glass microspheres as practical applications only the outer layer of the photocatalyst to absorb ultraviolet light, so only need to load on the microsphere surface reaches a certain small amount of catalyst can catalyze effect, dramatically reducing their consumption. Further, since the load on the hollow glass microspheres micron-sized, not only can be easily separated from the treatment solution, but also the treatment liquid floating on the surface, the contact area to improve the light, increasing the photocatalytic activity of the catalyst. Scientists Elina like TiO2 coated on the surface of hollow glass microspheres prepared composite photocatalyst studied photocatalytic oxidation of humic acid solution results. The results showed that the surface of the catalyst microsphere concentration 25g/m2 When neutral or alkaline solution, the maximum oxidation efficiency can be achieved 3.6mg·W-1·h-1.
In addition, the material in the hollow microsphere surface grafting efficiency obtained with adsorption capacity of the adsorbent is easy to handle, available in a large number of applications in environmental governance.