Influence of iron on the synthesis and stability of yttrium silicate apatite

Parmentier, Julien; Liddell, K.; Thompson, D. P.; Lemercier, H.; Schneider, Norbert; Hampshire, Stuart; Bodart, Philippe R.; Harris, Robin K.

doi:10.1016/s1293-2558(01)01151-7

Cited by 29 publications

(21 citation statements)

References 9 publications

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“…In fact, Eu 3+ ions enter into the X 2 oxyorthosilicate, apatite and yttria structures, causing an increase of the unit cell volume, promoting simultaneous decomposition of oxyorthosilicate and stabilization of the apatite phase. The last result is consistent with previous observations in mixed cation apatite of the type Fe 0.2 Y 4 (SiO 4 ) 3 O 0.2 [21]. The average crystallite size calculated with the Rietveld for the four phases results to be higher than 100 nm, the largest (about 180 nm) pertaining to the X 2 -Y 2 SiO 5 phase.…”

Section: Xrd and Temsupporting

confidence: 92%

Structural investigations and luminescence properties of nanocrystalline europium-doped yttrium silicates prepared by a sol–gel technique

et al. 2007

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Section: Xrd and Temsupporting

confidence: 92%

Structural investigations and luminescence properties of nanocrystalline europium-doped yttrium silicates prepared by a sol–gel technique

et al. 2007

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“…Paramentier et al 28 have reported that O-apatite, Y 4.67 (SiO 4 ) 3 , was a metastable phase in air, and it decomposed into Y 2 SiO 5 and Y 2 Si 2 O 7 at 1600°C after prolonged holding time. The decomposition was greatly accelerated by the LiYO 2 additive and it would succeed at a lower temperature.…”

Section: B Sintering Behavior Of ␥-Y 2 Si 2 O 7 Powdersmentioning

confidence: 99%

Low-temperature synthesis and sintering of γ-Y₂Si₂O₇

Sun

Zhou

2006

J. Mater. Res.

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In this article, a novel pressureless solid-liquid reaction method is presented for preparation of yttrium disilicate (␥-Y 2 Si 2 O 7 ). Single-phase ␥-Y 2 Si 2 O 7 powder was synthesized by calcination of SiO 2 and Y 2 O 3 powders with the addition of LiYO 2 at 1400°C for 4 h. The addition of LiYO 2 significantly decreased the synthesis temperature, shortened the calcination time, and enhanced the stability of ␥-Y 2 Si 2 O 7 . The sintering of these powders in air and O 2 was studied by means of thermal mechanical analyzer. It is shown that the ␥-Y 2 Si 2 O 7 sintered in oxygen had a faster densification rate and a higher density than that sintered in air. Furthermore, single-phase ␥-Y 2 Si 2 O 7 with a density of 4.0 g/cm 3 (99% of the theoretical density) was obtained by pressureless sintering at 1400°C for 2 h in oxygen. Microstructures of the sintered samples are studied by scanning electron microscope.

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“…Nevertheless, most of the researches focused on the powder [3][4][5][6] and thin film forms [2] of this material, only a few studied yttrium silicate in the bulk glassy state.…”

Section: Introductionmentioning

confidence: 99%