Impact of starting alumina powders on densification peculiarities of reactive-sintered YAG:Sm3+ ceramics

IF 2.9 Q1 MATERIALS SCIENCE, CERAMICS Open Ceramics Pub Date : 2025-01-27 DOI:10.1016/j.oceram.2025.100745

O․O․ Matvienko , I․O․ Vorona , S․V․ Parkhomenko , A․E․ Balabanov , А․Т․ Budnikov , A․D․ Tymoshenko , P․V․ Mateychenko , А․V․ Tolmachev , V․N Baumer , G․V․ Grygorova , Ya. Korol , R․P․ Yavetskiy

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Abstract

YAG:Sm³⁺ (5 at.%) transparent ceramics have been obtained by reactive sintering using different starting Al₂O₃ powders. Effect of particle size in the 100–400 nm range, morphology and dispersity of starting alumina powders on the properties of YAG:Sm³⁺ powder mixtures, their densification and resulted optical ceramics have been studied. It was shown that YAG:Sm³⁺ powder mixtures prepared with BMA15 and AKP-50 powders possess significant reduction of a fraction of micron-sized agglomerates. The particles within the range of 100–300 nm presented in BMA15 and AKP-50 powders, act as proppant, enabling collapse of the Y₂O₃ agglomerates. As a result, ceramics prepared from these powder mixtures show improved densification behavior. Reactively-sintered YAG:Sm³⁺ transparent ceramics prepared using AKP-50 powder are characterized by optical transmittance of 83% and low concentration of residual pores.

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