Influence of CaO and SiO2 additives on the sintering behavior of Cr,Ca:YAG ceramics prepared by solid-state reaction sintering

Chaika, M.; Mancardi, Giulia; Vovk, O.M.

doi:10.1016/j.ceramint.2020.06.045

Cited by 25 publications

(6 citation statements)

References 28 publications

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“…According to the literature, the highly intensive sintering of oxide nanocrystals begins at temperatures more than 1000 °C. 37–43 Thus, we assume that the structure of ceria support was the same in all experiments: 200–500 nm polycrystalline spheres consisting of 22–24 nm crystallites.…”

Section: Resultsmentioning

confidence: 99%

“…The XRD data show that the calcination and maximal temperature used in propane oxidation tests (500 C in both cases) is insufficient to activate an intensive recrystallization process responsible for the thermally induced CeO 2 crystal growth. According to the literature, the highly intensive sintering of oxide nanocrystals begins at temperatures more than 1000 C. [37][38][39][40][41][42][43] Thus, we assume that the structure of ceria support was the same in all experiments: 200-500 nm polycrystalline spheres consisting of 22-24 nm crystallites.…”

Section: Structural Characterizationmentioning

confidence: 99%

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In situ observation of highly oxidized Ru species in Ru/CeO₂ catalyst under propane oxidation

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Section: Structural Characterizationmentioning

confidence: 99%

In situ observation of highly oxidized Ru species in Ru/CeO₂ catalyst under propane oxidation

et al. 2022

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“…A solid-state reaction occurring between metal and the support results in the formation of new phases (Chaika et al, 2020). For Cu/ZnO catalysts, the formation of a Cu-Zn compound induced by hydrogen or a reducing atmosphere often occurs in hydrogenation reactions (Grunwaldt et al, 2000).…”

Section: Resultsmentioning

confidence: 99%

Electronic Metal-Support Interactions Between CuxO and ZnO for CuxO/ZnO Catalysts With Enhanced CO Oxidation Activity

Lyu¹,

Zhang²,

Li³

et al. 2022

Front. Chem.

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Metal-support interaction has been one of the main topics of research on supported catalysts all the time. However, many other factors including the particle size, shape and chemical composition can have significant influences on the catalytic performance when considering the role of metal-support interaction. Herein, we have designed a series of CuxO/ZnO catalysts as examples to quantitatively investigate how the metal-support interaction influences the catalytic performance. The electronic metal-support interactions between CuxO and ZnO were regulated successfully without altering the structure of CuxO/ZnO catalyst. Due to the lower work function of ZnO, electrons would transfer from ZnO to CuO, which is favorable for the formation of higher active Cu species. Combined experimental and theoretical calculations revealed that electron-rich interface result from interaction was favorable for the adsorption of oxygen and CO oxidation reaction. Such strategy represents a new direction to boost the catalytic activity of supported catalysts in various applications.

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“…In addition, the segregation of sintering additives such as MgO at the grain boundaries is possible, which can result in a deceleration of grain growth during the final stage of vacuum sintering 3,6 . Sintering additives like SiO 2 , MgO, and CaO are commonly utilized for the manufacturing of YAG‐based optical ceramics 7 . Selecting optimal concentrations of these sintering additives enables the attainment of desired characteristics for the optical ceramics.…”

Section: Introductionmentioning

confidence: 99%

“…3,6 Sintering additives like SiO 2 , MgO, and CaO are commonly utilized for the manufacturing of YAG-based optical ceramics. 7 Selecting optimal concentrations of these sintering additives enables the attainment of desired characteristics for the optical ceramics.…”

Section: Introductionmentioning

confidence: 99%

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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Influence of CaO and SiO2 additives on the sintering behavior of Cr,Ca:YAG ceramics prepared by solid-state reaction sintering

Cited by 25 publications

References 28 publications

In situ observation of highly oxidized Ru species in Ru/CeO₂ catalyst under propane oxidation

In situ observation of highly oxidized Ru species in Ru/CeO₂ catalyst under propane oxidation

Electronic Metal-Support Interactions Between CuxO and ZnO for CuxO/ZnO Catalysts With Enhanced CO Oxidation Activity

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

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Influence of CaO and SiO2 additives on the sintering behavior of Cr,Ca:YAG ceramics prepared by solid-state reaction sintering

Cited by 25 publications

References 28 publications

In situ observation of highly oxidized Ru species in Ru/CeO2 catalyst under propane oxidation

In situ observation of highly oxidized Ru species in Ru/CeO2 catalyst under propane oxidation

Electronic Metal-Support Interactions Between CuxO and ZnO for CuxO/ZnO Catalysts With Enhanced CO Oxidation Activity

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

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In situ observation of highly oxidized Ru species in Ru/CeO₂ catalyst under propane oxidation

In situ observation of highly oxidized Ru species in Ru/CeO₂ catalyst under propane oxidation