Study on the sintering behavior of Y3GaAl4O12 ceramics during pre-sintering and fabrication of highly transparent ceramics

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-08-19 DOI:10.1016/j.jeurceramsoc.2025.117759

Pan Gao , Zhengyang Jing , Guangsheng Tu , Bowen Chen , Hao Wang , Bingtian Tu , Honggang Gu , Shiyuan Liu , Weimin Wang , Zhengyi Fu

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引用次数: 0

Abstract

Yttrium aluminum gallium garnet (Y₃(Ga,Al)₅O₁₂,YAGG) based transparent ceramics exhibit promising application potential in the fields of scintillators, white LEDs/LDs and persistent phosphors. However, conventional vacuum sintering induces the evaporation of Ga₂O₃, damaging the compositional homogeneity. This study successfully fabricated the highly transparent Y₃GaAl₄O₁₂ ceramic via sintering the green body prepared from single-phase powder in air followed by hot isostatic pressing. Upon substituting Ga³⁺ for Al³⁺, Y₃GaAl₄O₁₂ ceramic exhibited more obvious grain growth during intermediate stage of sintering, resulting in a higher apparent activation energy for densification (2036 ± 157 kJ/mol). The evolution of microstructure and grain size in the pre-sintered Y₃GaAl₄O₁₂ ceramic were also investigated. Finally, the Y₃GaAl₄O₁₂ transparent ceramic (thickness 2.0 mm) had an in-line transmittance of 77 %@1064 nm, and the refractive index and optical band gap were 1.851 (589 nm) and 5.59 eV, respectively. This study provides a promising strategy to fabricate highly transparent gallium-containing garnet ceramics.

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Y3GaAl4O12陶瓷在预烧结和制备高透明陶瓷过程中的烧结行为研究

钇铝镓石榴石（Y3(Ga,Al)5O12，YAGG）基透明陶瓷在闪烁体、白光led / ld和持久性荧光粉等领域具有广阔的应用前景。然而，传统的真空烧结导致Ga2O3的蒸发，破坏了成分的均匀性。本研究将单相粉末制备的绿体在空气中烧结，然后进行热等静压，成功制备了高透明的Y3GaAl4O12陶瓷。以Ga3+取代Al3+后，Y3GaAl4O12陶瓷在烧结中间阶段晶粒生长更为明显，致密化表观活化能更高（2036 ± 157 kJ/mol）。研究了预烧结Y3GaAl4O12陶瓷的微观组织和晶粒尺寸的演变。最后，Y3GaAl4O12透明陶瓷（厚度2.0 mm）的在线透射率为77 %@1064 nm，折射率为1.851(589 nm)，带隙为5.59 eV。本研究为制备高透明含镓石榴石陶瓷提供了一种有前途的方法。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.