LI Jinshi ¹, CHEN Meihua ¹, YANG Yan ¹, HE Long ¹, LOU Xinpeng ¹, CHEN Maolin ¹,

SONG Jieguang ¹, CHEN LIN ¹, XU Minghan ²

(1. Key Laboratory for Industrial Ceramics of Jiangxi Province, School of Materials and Chemistry Engineering, Pingxiang

University, Pingxiang 337055, Jiangxi, China; 2.School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang

332005, Jiangxi, China)

Abstract: YAG posing some excellent properties is investigated and applied widely. The sintering technologies of YAG porous ceramics were optimized. The results are shown as follows, the porosity is first increased and second decreased with an decreasing increasing temperature speed, the compressive strength is shown the increasing tendency. The porosity is decreased with an increasing removing carbon temperature, the compressive strength is shown the increasing tendency. The porosity is decreased with an increasing removing carbon time,the compressive strength is shown the increasing tendency. The porosity is first increased and second decreased with an increasing sintering temperature, the compressive strength is shown the increasing tendency. The porosity is decreased with an increasing holding time, the compressive strength is shown the increasing tendency. Sintering technology of YAG porous ceramics is optimized on the basis of porosity and compressive strength, the better sintering technology is increasing temperature ratio for 8 ℃/min, removing carbon temperature at 800 ℃,removing carbon time for 1 h, sintering temperature at 1450 ℃ and holding time for 2 h. The porosity of prepared YAG porous ceramics is 57.4%, the compressive strength is 8.89 MPa.

Key words: YAG porous ceramics; sintering technology; porosity; compressive strength