Effect of Particle Size on Silicon Nitride Ceramic Slurry by Stereolithography

【摘要】 The effects of particle size,gradation and solid loading of silicon nitride （Si₃N₄） on the rheological behavior and curing properties of ceramic slurry are studied by stereolithography （SLA）.The results show that the particle size of Si₃N₄ powder has a signif icant influence on the rheological properties and stability of the slurry.When m_D50=1.3μm:m_D50=2.3μm=3:7,the slurry viscosity is low and the sedimentation is slow.The most important thing is that with the increase of the solid loading of the slurry,the viscosity of the slurry increases,the stability becomes higher,and the curing thickness decreases.The curing thickness of Si₃N₄ ceramic slurry with solid loading of 50 vol% can reach nearly 50μm.The above results finally show that the process optimizes the formulation of the slurry in rheological and curing properties.更多还原

【Abstract】 Abstract:The effects of particle size,gradation and solid loading of silicon nitride （Si₃N₄） on the rheological behavior and curing properties of ceramic slurry are studied by stereolithography （SLA）.The results show that the particle size of Si₃N₄ powder has a signif icant influence on the rheological properties and stability of the slurry.When m_D50=1.3μm:m_D50=2.3μm=3:7,the slurry viscosity is low and the sedimentation is slow.The most important thing is that with the increase of the solid loading of the slurry,the viscosity of the slurry increases,the stability becomes higher,and the curing thickness decreases.The curing thickness of Si₃N₄ ceramic slurry with solid loading of 50 vol% can reach nearly 50μm.The above results finally show that the process optimizes the formulation of the slurry in rheological and curing properties.更多还原