IR transparent hot pressed Mg-α/β-Sialon:Ba2+ ceramics

Joshi, Bhupendra; Li, Bin; Kshetri, Yuwaraj K.; Wang, Hao

doi:10.1016/j.ceramint.2014.05.001

Cited by 15 publications

(4 citation statements)

References 24 publications

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“…To achieve higher light transmission, a higher α-Sialon phase with thin grain boundaries and less glassy phase should be present. Joshi et al [12] fabricated the IR transparent Sialon with the higher transmission of 78 % in the NIR region.…”

Section: Transparent / Translucent Sialon Ceramicsmentioning

confidence: 99%

Recent advances in transparent / translucent polycrystalline Sialon ceramics

2020

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The transparent polycrystalline ceramics have acquired an interest in different fields such as transparent armor windows, cutting tools, IR windows, wear and scratch resistant parts (watches, bearings, and displays), and synthetic opals and rubies. In recent years, the transparent ceramics are applied in lasers and high power solid state lighting as a luminescent material. Different types of transparent polycrystalline ceramics were reported for different applications. However, there are few transparent ceramics that can withstand the aggressive environment. Recently, some studies on optical properties of Sialon ceramics show that the Sialon ceramics would be suitable for the optical applications. Sialon ceramics are known for their excellent mechanical and thermal properties and applied as a structural ceramics. The Sialon ceramics have all those potentials that can overcome the mechanical and thermal limitations of existing transparent ceramics where a very high grade of transparency is not required. The reported Sialon ceramics are IR transparent and visibly translucent. The translucent Sialon ceramics can be applied as a phosphor ceramic plate (PCP) for high power solid state lighting (SSL). However, the fabrication and production processes are costly due to the high temperature synthesis and complex processing techniques. In this short review, we will discuss the recent trend, processing techniques, properties, applications, and prospects of transparent Sialon ceramics.

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Section: Transparent / Translucent Sialon Ceramicsmentioning

confidence: 99%

Recent advances in transparent / translucent polycrystalline Sialon ceramics

2020

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“…In addition to these characteristics, β-SiAlON was also recently reported to be photo luminescent [3,4]. β-SiAlON is currently synthesized using a variety of methods such as hot pressing, gas pressure sintering, and pressureless sintering [5][6][7][8][9]. However, these processes require high temperatures and prolonged run times, and are both exergy-and time-consuming.…”

Section: Introductionmentioning

confidence: 99%

Combustion Synthesis of β-SiAlON Using 3D Ball Milling

Suzuki

Liu

et al. 2017

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Combustion synthesis (CS) of β-SiAlON was conducted using a 3D ball mill, with a focus on the effect of the 2D/3D ball mill premixing conditions on the CS raw material particle size as well as on the yield and grain shape of the final products. The results showed that the particle size distribution of the raw materials was significantly affected by the premixing conditions. Various particle sizes and particle size distributions could easily be obtained by using a 3D mill instead of a 2D mill due to the complex biaxial rotation movement of 3D milling. The particle size was more sensitive to the rotation ratio (vertical spin/horizontal spin, Vv/Vh) than the rotation rate when using 3D milling. Finally, β-SiAlON with less than 5 mass% unreacted Si was obtained using premix milling conditions of 135×200 [vertical spin (rpm) × horizontal spin (rpm)]. The grain shapes of the final products were clearly influenced by the particle size distribution of the raw mixtures.

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“…Fortunately, as we have shown in this report that the above statement is not completely accurate and a high degree of visible and NIR transparency along with efficient upconversion photoluminescence can be achieved in α‐Sialon ceramics. There have been some reports on translucent/transparent α‐Sialon ceramics . α‐Sialon ceramics with equiaxed grain morphology are found to have better optical transparency as compared to β‐Sialon having elongated grains.…”

Section: Introductionmentioning

confidence: 99%

“…There have been some reports on translucent/transparent a-Sialon ceramics. [20][21][22][23][24] a-Sialon ceramics with equiaxed grain morphology are found to have better optical transparency as compared to b-Sialon having elongated grains. There are also reports of downconversion luminescence properties on various Ln 3+ -doped a-Sialon powder phosphors under ultraviolet and visible light excitations.…”

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Efficient Near Infrared to Visible and Near‐Infrared Upconversion Emissions in Transparent (Tm³⁺, Er³⁺)‐α‐Sialon Ceramics

et al. 2016

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Intense visible and near‐infrared frequency upconversion and a frequency downconversion photoluminescence have been reported for the first time in Tm3+ and Er3+ co‐doped transparent α‐Sialon ceramics under 980 nm excitation. The α‐Sialon ceramics were prepared by hot‐press sintering technique. Intense upconversion bands at 554, 678, 803 nm, and a downconversion band at 1530 nm were observed as a result of the efficient energy transfer between Er3+ and Tm3+ ions. The quadratic dependence of upconversion intensities on the excitation power indicates that the upconversion process is governed by two‐photon absorption process. The sintered samples of thickness 0.20 mm have transparency above 80% in the range of 2000 to 4200 nm and it reaches as high as 82% at 3350 nm. Moderately low phonon energy was found with the highest frequency band at 828 cm−1. These novel properties manifest the potential applications of transparent α‐Sialon ceramics as a multifunctional material.

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IR transparent hot pressed Mg-α/β-Sialon:Ba2+ ceramics

Cited by 15 publications

References 24 publications

Recent advances in transparent / translucent polycrystalline Sialon ceramics

Recent advances in transparent / translucent polycrystalline Sialon ceramics

Combustion Synthesis of β-SiAlON Using 3D Ball Milling

Efficient Near Infrared to Visible and Near‐Infrared Upconversion Emissions in Transparent (Tm³⁺, Er³⁺)‐α‐Sialon Ceramics

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IR transparent hot pressed Mg-α/β-Sialon:Ba2+ ceramics

Cited by 15 publications

References 24 publications

Recent advances in transparent / translucent polycrystalline Sialon ceramics

Recent advances in transparent / translucent polycrystalline Sialon ceramics

Combustion Synthesis of β-SiAlON Using 3D Ball Milling

Efficient Near Infrared to Visible and Near‐Infrared Upconversion Emissions in Transparent (Tm3+, Er3+)‐α‐Sialon Ceramics

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Efficient Near Infrared to Visible and Near‐Infrared Upconversion Emissions in Transparent (Tm³⁺, Er³⁺)‐α‐Sialon Ceramics