Phase formation of Ca-α-sialon by reaction sintering

Rutten, van Jwt; Hintzen, Htjm Bert; Metselaar, R Ruud

doi:10.1016/0955-2219(95)00010-0

Cited by 59 publications

(33 citation statements)

References 11 publications

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“…For increasing n values we could not determine a significant change of the lattice parameters. The observed trends match those described in literature, where also the main effect is observed for increasing m value (32). For samples with compositions outside the single-phase Ca-a-sialon area (m 0.5 or n41.5), apart from the yellow emission, assigned to Eu 2+ in Ca-a-sialon, we observed a strong additional emission.…”

Section: Eu-doped A-sialonsupporting

confidence: 92%

Luminescence Properties of Terbium-, Cerium-, or Europium-Doped α-Sialon Materials

Krevel

Rutten

Mandal

et al. 2002

Journal of Solid State Chemistry

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248

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Section: Eu-doped A-sialonsupporting

confidence: 92%

Luminescence Properties of Terbium-, Cerium-, or Europium-Doped α-Sialon Materials

Krevel

Rutten

Mandal

et al. 2002

Journal of Solid State Chemistry

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336

248

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“…Typically, α/β-SiAlON composites or pure α-SiAlON have been prepared by hot-press (HP) [6], pressure-less sintering [7], reaction sintering [8], and carbothermal reduction and nitridation (CRN) [9]. Most of these methods, however, involve the use of expensive raw materials such as high-purity Si 3 N 4 and AlN, which are sintered at temperatures of 1700-1800 °C for several hours in a nitrogen atmosphere.…”

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confidence: 99%

Fabrication of mixed α/β-SiAlON powders via salt-assisted combustion synthesis

Niu

Harada²,

Suzuki

et al. 2014

Journal of Alloys and Compounds

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High-quality Y-and Ca-α/β-SiAlON and α-SiAlON ceramics were synthesized via salt-assisted combustion synthesis from Si, Al, and metal oxide (Y 2 O 3 and CaO) with the addition of NaCl and MgCl 2 under a nitrogen pressure of 1 MPa. NaCl and MgCl 2 were employed as they act as excellent diluents that effectively absorb the reaction heat through melting and evaporation. We found that the type of metal chlorides employed significantly affected the α/β ratio and the morphology of the product, with the use of NaCl affording high α/β ratios and equiaxed morphologies, while the use of MgCl 2 resulting in low α/β ratios and elongated grains. The results of this work suggest that high-purity α/β-SiAlON composite products of intended α/β ratios can be successfully fabricated by controlling the initial metal chloride content.

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“…Then, the 'm' values of the synthesized phosphors in Fig. 4 were induced by the calculated lattice parameter and the equations suggested by Rutten et al 17) að AÞ ¼ 7:749 þ 0:0673m þ 0:0023n cð AÞ ¼ 5:632 þ 0:0550m À 0:0054n…”

Section: Resultsmentioning

confidence: 99%

The effect of flux addition to Eu<sup>2+</sup>-doped Ca-α-SiAlON phosphor

Park

Kim

et al. 2013

J. Ceram. Soc. Japan

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A yellow-emitting Eu 2+ -doped Ca-¡-SiAlON phosphor is a promising candidate to make white LEDs by combining with blue LED. In the current research, the effect of flux (NH 4 Cl or NH 4 F) addition on the Ca-¡-SiAlON:Eu 2+ phosphor was investigated. The formation of both the compound and liquid phase between the flux and raw materials resulted in the decreased photoluminescence (PL) intensity in the early stage. However, the subsequent melting of second phases and retarded crystallization enhanced the PL intensity with increasing the synthesis temperature and time. The increased PL intensity for the flux-added compositions is attributed to the less surface damages due to grinding of as-synthesized agglomerate-like phosphors. Further, the flux addition enhanced the particle growth by forming agglomerates in the early stage and it also influenced the particle morphology from the typical acicular shape to pseudo-equiaxed shape.

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Phase formation of Ca-α-sialon by reaction sintering

Abstract: In this study the reaction sintering route for the formation

Cited by 59 publications

References 11 publications

Luminescence Properties of Terbium-, Cerium-, or Europium-Doped α-Sialon Materials

Luminescence Properties of Terbium-, Cerium-, or Europium-Doped α-Sialon Materials

Fabrication of mixed α/β-SiAlON powders via salt-assisted combustion synthesis

The effect of flux addition to Eu<sup>2+</sup>-doped Ca-α-SiAlON phosphor

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