Northern magnetic aerogels prepared lightweight programmable expected to reduce the cost of space launch avionics
Recently, Xie from the Beijing University of Aeronautics and Astronautics, programmable ultra-light magnetic aerogels Chen Ziyu and the University of Colorado at Boulder research team led by Ivan Smalyukh cooperation prepared, is expected for the aerospace aircraft and intelligent field devices, thus reducing the quality of equipment, reduce operating costs, while remote people and equipment, non-contact interaction. really lived alone on the moon Chang E? Is there really a magnificent temple above the clouds? Is there really a Jedi vastness of the universe? We\’ve all dreamed of the universe can travel, to go and find the answer. In recent years, the rapid development of aerospace vehicles allows us away from the dream is getting closer, space travel program has started, however, the high launch costs allows most people stay away. In the prior art, the cost of transmitting the object about one gram equivalent to 1 gram of gold.
The ferromagnetic nanoparticles are uniformly dispersed in the airgel precursor solution, and applying a uniform magnetic field of the ferromagnetic particles have a consistent orientation of magnetization, wait solution was gradually solidified, Fe the tight binding of magnetic particles in the network structure, so as to maintain a consistent magnetization direction, and finally through the critical drying to obtain a density of only 0.12 kg m-3 ultralight magnetic airgel – i.e., an \”air magnet\” (aero-magnet).
Since the interior of the ferromagnetic nanoparticles (monodisperse barium ferrite and cobalt nanorods nanodisks) consistent orientation of magnetization, high magnetic aerogels magnetic anisotropy. Programmable sample is reflected in: the magnetization size on the one hand, the sample may be linearly adjusted by controlling the doping concentration of the ferromagnetic particles. On the other hand, may be implemented as \”air magnet\” ordered magnetic domains, a controllable orientation of the array by designing the external field is applied. Accordingly, researchers have the double domains and single domain \”magnetic air\” prepared to study the magnetic properties, shows the relevant magnetic response. For single-domain \”air magnet\”, researchers annular base magnets, to achieve a single domain magnetic levitation display airgel. For double domains \”air magnet\”, the researchers made into a simple magnetic switch, to achieve on-off control circuit. In addition to the above properties of ultra-light materials and programmable magnetic domains, the development of \”emptyGas magnet \”also has good heat insulating properties and hydrophobicity, can be applied to the vacuum, low-temperature environment space, and the potential field of energy-saving materials.