Texture development of surface-modified SiC prepared by EPD in a strong magnetic field

Abstract

Silicon carbide is a very important material for various applications and its properties are expected to be improved by controlling the crystallographic orientation. It was difficult to simultaneously consolidate SiC powder and sintering additives by electrophoretic deposition (EPD) because of the different electrophoretic mobility. When using the alumina-coated SiC by the solgel method, it is possible to deposit SiC and sintering additives by EPD at the same time.In this study, we demonstrated that the c-axis alignment of SiC was controlled by EPD and a strong magnetic field, and we investigated the effect of the surface-modification on the microstructure and the degree of orientation. The dilute solution and the large number of repeated coating times prevent the oxide phase from precipitating at the multiple grain junctions and enhance grain growth. The grain growth promoted the degree of orientation in the textured SiC prepared by EPD in a strong magnetic field.

Phosphor Deposits of β-Sialon:Eu2+ Mixed with SnO2 Nanoparticles Fabricated by the Electrophoretic Deposition (EPD) Process

“…This process has several advantages such as: short depositing time, simple equipment requirement, and little restriction of substrate shape, making it become a cost-effective and versatile process [ 7 , 8 ]. The EPD process has been reported as a widely used technique for preparing a variety of the deposits including coatings [ 9 – 11 ] and ceramic bodies [ 12 – 14 ]. In particular, the EPD process has also been utilized to fabricate the phosphor deposits for the pseudo-white LEDs [ 15 – 18 ], even the monochromatic and color screens for the information displays [ 19 , 20 ].…”

Two‐Dimensional Orientation in Bi4Ti3O12 Prepared Using Platelet Particles and a Magnetic Field

“…On the basis of this background, we found that a strong magnetic field has been successfully utilized to control the development of texture, even for diamagnetic Al 2 O 3 , by colloidal processing for particle dispersion in a slurry . Magnetic orientation has been applied to a wide variety of useful ceramics with feeble magnetic susceptibilities, such as TiO 2 , ZnO, AlN, SiC, zeolite, piezoelectric ceramics, etc …”