Cerium–silicon system

Bulanova, M.; Zheltov, P.N.; Meleshevich, K. A.; Saltykov, P. A.; Effenberg, G.

doi:10.1016/s0925-8388(02)00409-7

Cited by 49 publications

(34 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Phase relations in the Ce-Si system were determined experimentally by Bulanova et al [10] Thermodynamic descriptions of the Ce-Si system were reported by Grobner et al [11] and Shukla et al [12] The former one was used in the present study for the Redlich-Kister parameters of the liquid phase, although the latter one using the modified quasi-chemical model fits experimental data better. The existence of CeSiP 3 was reported by Hayakawa et al [13] However, it has not been considered in the present study due mainly to the lack of experimental thermochemical properties.…”

Section: Figure 4 the Tentative Phase Diagram Of Ce-p Systemmentioning

confidence: 94%

Removal of Phosphorus in Metallurgical Silicon by Rare Earth Elements

Tang

Løvvik

Safarian

et al. 2014

Metallurgical and Materials Transactions E

View full text Add to dashboard Cite

Removal of phosphorus in metallurgical silicon is one of the crucial steps for the production of SoG-Si feedstock. The possibility of doping rare earth elements for phosphorus removal has in this work been studied both theoretically and experimentally. Thermochemical properties of Ce and Pr monophosphides have first been estimated by ab initio thermodynamic simulations based on density functional theory and the direct phonon method. The reliability of the first principles calculations was assessed by coupling with the phase diagram data of the Pr-P system. Equilibrium calculations confirmed the existence of stable rare earth monophosphides in solid silicon. Experimental investigations were then carried out, employing a high temperature resistance furnace. The Ce-doped silicon samples were examined by EPMA and ICP analysis. The efficiency of phosphorus removal by means of rare earth doping was discussed in detail in the paper.

show abstract

Section: Figure 4 the Tentative Phase Diagram Of Ce-p Systemmentioning

confidence: 94%

Removal of Phosphorus in Metallurgical Silicon by Rare Earth Elements

Tang

Løvvik

Safarian

et al. 2014

Metallurgical and Materials Transactions E

View full text Add to dashboard Cite

show abstract

“…The enthalpy was determined with an error of 1.5%, which was estimated by making comparison with the thermodynamic properties of standard samples (α-Al 2 O 3 , Mo). Table 3 indicates that the entire temperature range of measurement has three subranges: 437-1549 K, 1579-1652 K, and 1745-1806 K, which, according to [10], corresponds to the solid-phase state of the sample, the regions L + Ce 3 Si 2 and L + Ce 5 Si 4 , and the liquid state of the sample, respectively. The melting temperature of the silicide, determined as average over the range 1549-1579 K, is equal to 1564 ± 30 and is in good agreement with 1533 K (±1%) [10].…”

Section: Resultsmentioning

confidence: 99%

Thermodynamic properties of Ce5Si3 between 55 and 1806 K

Gorbachuk

2008

Powder Metall Met Ceram

View full text Add to dashboard Cite

The heat capacity and enthalpy of Ce 5 Si 3 are examined for the first time over a wide temperature range. The values of heat capacity, entropy, reduced Gibbs energy (J ⋅ mole −1 ⋅ K −1 ), and enthalpy (J ⋅ mole −1 ) at 298.15 K are determined: C P°( T) = 230.62 ± 0.93; S°(T) = 352.0 ± 2.8; Φ′(T) = = 185.2 ± 2.8; H°(T)-H°(0 K) = 49,744 ± 249. The temperature dependences of Ce 5 Si 3 enthalpy (J ⋅ mole −1 ) are determined as H°(T)-H°(298.15 K) = 19.934 ⋅ 10 −3 ⋅ T 2 + 245.26 ⋅ T + 2,358,300 × × T −1 -82,807; H°(T)-H°(298.15 K) = 413.78 ⋅ T -123,368 for 298.15-1564 K and 1745-1806 K, respectively. The enthalpy and entropy melting of Ce 5 Si 3 are calculated as follows: T m = 1564 ± ± 30 K, ΔH m = 172.7 ± 12.2 kJ ⋅ mole −1 , and ΔS m = 110.4 ± 7.8 J ⋅ mole −1 ⋅ K −1 .

show abstract

“…Most of thermodynamically unlikely features in the Ce-Si phase diagram in [Massalski2] were alleviated in the phase diagram constructed by [2002Bul], as reported by [2004Oka]. However, [2004Oka] pointed out that the very narrow (<1 at.%) two-phase field, Cs 3 Si 5 + CsSi 2 , with a constant width in the temperature range over >1500°C was still unlikely.…”

mentioning

confidence: 91%

mentioning

confidence: 99%

“…However, [2004Oka] pointed out that the very narrow (<1 at.%) two-phase field, Cs 3 Si 5 + CsSi 2 , with a constant width in the temperature range over >1500°C was still unlikely. Figure 1 shows the Ce-Si phase diagram obtained by thermodynamic optimization by [2009Shu]. The cCe/bCe allotropic transformation temperature was moved from Another possible scheme for solving this problem speculated in [2004Oka] was the existence of a second-order transition between Cs 3 Si 5 and CsSi 2 .…”

mentioning

confidence: 99%

See 1 more Smart Citation