3 results about "Spherical morphology" patented technology

The application discloses a kind of microspheroidal high-entropy spinel type ferrite wave-absorbing materials and preparation method thereof, belong to electromagnetic wave absorbing material technical field, the preparation method includes with the designed molar ratio six metal nitrate is weighed and dissolved in deionized water, then add ammonium fluoride, urea, after stirring, the obtained solution is hydrothermal reaction at a certain temperature for a certain time to obtain precursor, the precursor is calcined to obtain microspheroidal high-entropy spinel type ferrite.The obtained wave-absorbing material is single-phase spinel structure, micron-sized spherical morphology, its chemical formula is MFe2O4;Wherein M=Co, Ni, Cu, Zn, Cr.The microspheroidal high-entropy spinel type ferrite wave-absorbing material and preparation method thereof are used, and the performance of pure ferrite wave-absorbing material can be effectively improved, with the characteristics of simple preparation, strong absorption performance, absorption frequency bandwidth.

The invention relates to a template-assisted morphology-structured large-size mercury-based II-VI group nanocrystal synthesis method, which is realized by the following steps: firstly, dissolving a mercury source precursor in a solvent of a high-concentration soft template agent to form reversed-phase vesicles, and using the vesicles as containers for crystal growth; secondly, preparing a high-activity tellurium precursor solution, and slowly injecting the high-activity tellurium precursor solution into the vesicles to control nucleation and growth of crystals; and finally, controlling the reaction temperature and the dropping rate to ensure that the crystal stably grows to the size of 50-70nm in the elastic confinement of the soft template, and keeping the spherical morphology. After the reaction is finished, a polar solvent is added for demulsification, large-size nanocrystals are separated out through low-speed centrifugation, and small-particle by-products are removed. The morphology control bottleneck in large-size crystal synthesis in the prior art is effectively broken through, the high-quality mercury-based II-VI group nanocrystal is obtained, and the mercury-based II-VI group nanocrystal is particularly suitable for integrated application of high-performance devices needing accurate size and morphology control.

This invention discloses a Prussian blue-based cathode material with a composite morphology, its preparation method, and its applications. The Prussian blue-based cathode material with a composite morphology provided by this invention includes a first Prussian blue-based cathode material and a second Prussian blue-based cathode material. The primary particles of the first Prussian blue-based cathode material have a near-spherical or spherical morphology, while the primary particles of the second Prussian blue-based cathode material have a cubic or near-cubic morphology. The Prussian blue-based cathode material provided above simultaneously contains Prussian blue-based cathode materials with cubic or near-cubic and spherical or near-spherical morphologies, enabling the composite morphology Prussian blue-based cathode material to combine the advantages of both morphologies in terms of electrical and processing performance. Furthermore, the two different morphologies of the primary particles can form a particle size distribution, increasing the tap density and compaction density of the Prussian blue-based cathode material, thereby achieving a higher energy density.