放电等离子烧结致密化钛酸铝陶瓷的制备与性能研究

doi:10.16552/j.cnki.issn1001-1625.2024.1508

摘要/Abstract

摘要： 钛酸铝(Al₂TiO₅)具有高熔点、低热膨胀系数及优异的抗热震性能,在耐火材料等领域具有广泛应用。然而,Al₂TiO₅的烧结致密性较差,限制了其进一步发展。本文采用放电等离子烧结(SPS)技术制备了致密的Al₂TiO₅陶瓷,并比较了SPS和无压烧结两种方法对Al₂TiO₅陶瓷致密性的影响。结果表明,在1 350 ℃、60 MPa、10 min的烧结条件下,SPS制备的Al₂TiO₅陶瓷致密性最高。与无压烧结相比,SPS制备的Al₂TiO₅陶瓷显气孔率从(11.34±0.53)%降低至(2.41±0.61)%,而体积密度从(3.09±0.01) g/cm³增加至(3.64±0.02) g/cm³,相对密度从(83.97±0.22)%增加至(97.85±0.43)%。

关键词: 钛酸铝, 致密性, 放电等离子烧结, 扩散蠕变, 晶界滑移

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

中图分类号:

TQ174

蒋梦婷, 邓腾飞. 放电等离子烧结致密化钛酸铝陶瓷的制备与性能研究[J]. 硅酸盐通报, 2025, 44(6): 2269-2279.

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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