Combined effect of MgO sintering additive and stoichiometry deviation on YAG crystal lattice defects

Кравцов, А.В.; Никова, М.С.; Vakalov, D.S.; Тарала, В.А.; Chikulina, I.S.; Malyavin, F.F.; Chapura, О.М.; Krandievsky, S.O.; Kuleshov, D.S.; Lapin, V.A.

doi:10.1016/j.ceramint.2019.06.287

Cited by 22 publications

(2 citation statements)

References 40 publications

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“…For example, when using magnesium oxide as a sintering additive to obtain optical ceramics based on YAG, substitutional defects

{\mathrm{Mg}}_{{\mathrm{Al}}}^{\prime}

{\mathrm{Mg}}_{\mathrm{Y}}^{\prime}

are formed during vacuum sintering. The formation of a more fusible phase of aluminum–magnesium spinel of various compositions is also possible 38 . When using TEOS as a sintering additive,

{\mathrm{Si}}_{{\mathrm{Al}}}^ \bullet \

defects are formed, as well as low‐melting SiO 2 –Al 2 O 3 eutectic solid solutions 3 .…”

Section: Discussionmentioning

confidence: 99%

“…The formation of a more fusible phase of aluminum-magnesium spinel of various compositions is also possible. 38 When using TEOS as a sintering additive, Si • Al defects are formed, as well as low-melting SiO 2 -Al 2 O 3 eutectic solid solutions. 3 Additionally, oxygen vacancies 𝑉 •• 𝑂 are inevitably formed under vacuum sintering conditions.…”

Section: Discussionmentioning

confidence: 99%

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Silver nanoparticles as a new sintering additive for the fabrication of YAG:Ce optical luminescent ceramics

Kravtsov,

Medyanik,

Tarala

et al. 2023

J Am Ceram Soc.

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In this study, silver nanoparticles (NPs) were considered for the first time as a sintering additive in the manufacture of YAG:Ce luminescent ceramics. The influence of the addition of silver NPs on the sintering kinetics of ceramics was investigated. It was found that the addition of Ag NPs in the concentration range of 0.027–0.44 wt% does not result in the formation of secondary phases in YAG:Ce ceramics. It was demonstrated that the light transmission of ceramics is dependent on the concentration of Ag NPs. The use of NPs additive has made it possible to increase the light transmission of ceramics compared with the reference sample without sintering additives. The combination of two sintering additives, TEOS and silver NPs, enables the achievement of enhanced optical transparency in ceramics compared to the individual application of sintering additives. At an optimal silver concentration of 0.11 wt%, in combination with 0.5 wt% TEOS, a ceramic light transmission value of 77% was attained. The study has identified a correlation between the luminescence intensity of YAG:Ce ceramics and the concentration of silver NPs. It was observed that the utilization of low concentrations of the Ag additive had negligible impact on the luminescence properties, whereas the introduction of high concentrations of Ag NPs led to a deterioration in the luminescence and optical transparency of the ceramic.

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“…For example, when using magnesium oxide as a sintering additive to obtain optical ceramics based on YAG, substitutional defects

{\mathrm{Mg}}_{{\mathrm{Al}}}^{\prime}

{\mathrm{Mg}}_{\mathrm{Y}}^{\prime}

are formed during vacuum sintering. The formation of a more fusible phase of aluminum–magnesium spinel of various compositions is also possible 38 . When using TEOS as a sintering additive,