Abstract
Microsphere powder containing monodisperse polymethylmethacrylate (PMMA) microspheres and Si3N4 particles was prepared by spray-dried method. The homogeneous green body was obtained by using the microsphere powder and Cold Isostatic Pressing (CIP) method. The porous Si3N4 ceramics with uniformly-distributed micron-sized spherical pores were fabricated after sintering under N2 atmosphere. The properties of the samples with differential additions and various sizes of the PMMA microspheres as pore-forming agent respectively were compared. The results showed that the optimal properties of the materials were achieved when the PMMA microspheres with a diameter of 5μm were used as the pore-forming agent. The average bending strength of the samples was 122MPa with a dielectric constant of 3.46, when the porosity was about 51%. The fabrication method is promising for the industrial applications of the porous Si3N4 ceramics with excellent properties.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
