Processing of Mn–Zn ferrites using mould casting with acrylic thermosetting binder

Abstract

In this paper, a simple manufacturing process for Mn-Zn ferrite powder is described, which can be considered as a modified powder injection moulding process. This method uses acrylic thermosetting resin as the binder. The moulding is carried out at room temperature by directly pouring the slurry (resin and ferrite) in the mould. The mixture is heated at the curing temperature (70uC) of resin to permit polymerisation and cross linking of the polymer. In order to optimise the moulding step, different volume fractions of powder with resin were mixed. The optimal powder load was 50 vol.-%. The best thermal debinding cycle was determined by means of thermogravimetric analysis. Sintering was performed according to oxygen partial pressure equilibrium curves at 1330uC for 3 h. Magnetic properties were compared with those obtained by uniaxial compacted parts.

Study of the densification, mechanical and magnetic properties of Ni–Zn ferrites sintered in a solar furnace

“…At 1300 ºC, a low intergranular porosity is observed, but intragranular porosity is observed as well. (PIM), which was referred to as duplex microstructure [17].…”

Injection molded Mn-Zn ferrite ceramics

“…Ceramic injection molding has been successfully used for the production of complex single section ceramics with high density and mechanical strengths. However, little work has been reported on the fabrication of magnetic ceramics using injection molding technique [2]- [4]. In this paper, the production of Mn-Zn ferrite ceramic specimens is reported along with their basic properties.…”

Structural Construction of Binders Based on Orthophosphoric Acid and Refractory Materials

“…During the research of casting processes, it is possible to apply modeling of thermal processes in layered structures, for example, temperature distribution in the mold and casting [9,10]. For the manufacture of molds and cores, the volume of which is millions of tons per year, we usually use iron phosphate and magnesium phosphate mixtures [4,[11][12][13][14], which often contain scarce and substandard components.…”

“…A variety of binder systems have been developed predicated on a foundry's problems [14,[19][20][21][22][23]. Binders have been solving many problems by addressing the casting quality, productivity, and environmental attributes foundry men receive from their binders.…”