Effect of Sintering Temperature on Properties of YAG Porous Ceramics via Atmospheric Sintering Method

摘要

Yttrium aluminum garnet (YAG) materials have a number of unique properties and their application is extensive. Burn is caused by extremely high temperature or residence time, and undercurrent occurs when the sintering temperature is too low or the holding time is insufficient, resulting in low product performance or extremely small shrinkage. In this paper, the effect of sintering temperature on the properties of YAG porous ceramics was investigated. Results show that the firing temperature of the ingredients varies and burns the same sintering process and additive content of different samples. The SiO_2 content in the furnish tends to increase due to sintering. The effect of temperature on the mechanical properties of the samples after sintering is significant. The raw materials include 60wt% YAG, 10wt% CaO, 10wt% SiO_2, and 20wt% soluble starch. Molding and sintering were conducted in 20 MPa pressure for 10 min and at 1500 °C for 2 h, respectively. The porosity and compressive strength of the sample are 42.2% and 5.8 MPa, respectively. The outside shape of the sample remained intact, and an improved pore microstructure is shown.