Preparation and Properties of Dense Aluminum Titanate Ceramics via Spark Plasma Sintering

doi:10.16552/j.cnki.issn1001-1625.2024.1508

Abstract

Abstract: Aluminum titanate (Al₂TiO₅) is widely utilized in refractory materials due to its high melting point, low thermal expansion coefficient, and exceptional thermal shock resistance. However, the poor sintering densification of Al₂TiO₅ limits its broader application. In this paper, dense Al₂TiO₅ ceramics were prepared by spark plasma sintering (SPS), and the effects of SPS and pressureless sintering on the densification of Al₂TiO₅ ceramics were compared. The results indicate that Al₂TiO₅ ceramics prepared via SPS exhibit the highest density at 1 350 ℃, 60 MPa and 10 min sintering condition. Compared to pressureless sintering, the apparent porosity of Al₂TiO₅ ceramics prepared by SPS decreases from (11.34±0.53)% to (2.41±0.61)%. Additionally, the bulk density increases from (3.09±0.01) g/cm³ to (3.64±0.02) g/cm³, and the relative density improves from (83.97±0.22)% to (97.85±0.43)%.

Key words: aluminum titanate, densification, spark plasma sintering, diffusion creep, grain boundary sliding

CLC Number:

TQ174

JIANG Mengting, DENG Tengfei. Preparation and Properties of Dense Aluminum Titanate Ceramics via Spark Plasma Sintering[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(6): 2269-2279.

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