| 摘要 |
PURPOSE:To obtain the subject material excellent in kneadability and fluidity, easy to degrease, also high in the mechanical strength of the sintered compacts therefrom by incorporating a binder resin with fine spherical ceramic powder having the mean size not greater than a specified value. CONSTITUTION:The objective injection molding material can be obtained by incorporating (A) spherical ceramic powder having <=7mum mean diameter (e.g. spherical alumina powder) with (B) a binder resin (e.g. polybutyl methacrylate resin) and, pref. furthermore, (C) nonspherical ceramic powder having <=2.5mum mean diameter (e.g. mullite powder). This material may further be incorporated with ingredient(s) like solvent, wax, or liquid paraffin. Because of using the above fine ceramic powder as ceramic source, large amount of the binder resin, solvent etc., beyond the necessity may not be added, thus leading to easier degreasing and getting hard to develop such a phenomenon as deformation or cracking in the degreasing. |
