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High fraction of inorganic compounds filled polymer composites with lightweight character show a potential application on building and transportation. In this study, super‐high fraction of organic montmorillonite (OMMT>30%) filled Polyamide 6 (PA6) foams were prepared via a solution foaming. The influence of OMMT content on structures and properties of foams was studied. When the OMMT content was higher than 50%, the surface of cells turned from smooth to nest‐like appearance. The addition of excessive clay depressed the crystalline behavior of PA6 during foaming. However, it did not damage the compressive mechanical properties of foams. PA6 macromolecules played a role of binder, endowing interfacial strength and structural integrity of cell walls. With the increase of OMMT loading content from 33% to 75%, the composite foams showed an increased specific moduli from 2.8 to 4.1 MPa. The current work realized a facile processing of polymer foams with high loading of fillers. The corresponding filler dominant lightweight products open the door to a wide range of potential applications to reduce the use of non‐biodegradable plastics.

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High-performance submicron-scaled NiCuZn ferrites are prepared by the solid-state reaction method through using CuO as additive. In the synthesis process, a mixture of superfine powder is sintered at 900 • C for 3 h, and the obtained product is NiZn-ferrite with spinel structure. We observe that the particle size increases with raising the sintering temperature. The NiCuZn ferrite with relatively uniform size and granular shape has the best performance: its coercivity is 14 Oe (1 Oe = 79.5775 A•m −1 ) and saturation magnetization is 48 emu/g. We also study the effects of particle size, magnetocrystalline anisotropy, and microstructure on coercivity. The method presented here is convenient and economical for producing the high-permeability ferrite powders.

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