Growth and characteristics of Mg2SiO4: Ti crystal

Li, Shenjun; Liu, Lin; Zu-Lun, Wang; Yandao, Jiang; Xiaobo, Jiang; Wu, Xing

doi:10.1016/0022-0248(94)90183-x

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…The low amount of titanium dopant (Table 1) and the same ionic ratios of magnesium (0.72Å) substituted by nickel (0.69Å) in the resulting enstatite were probably not sufficient to induce a significant shift in cell parameters. Both Ti and Ni were incorporated in the enstatite substitutes for Mg 2 þ in the octahedral sites, their behavior therefore being similar to those observed for Ti 4 þ in Mg 2 SiO 4 (forsterite) [28] and Ni 2 þ in enstatite [9].…”

Section: Resultsmentioning

confidence: 82%

“…We believe that the luminescence signal in Ti-doped enstatite was due to Ti 4 þ ion, and we exclude the contribution of Ti 3 þ because, in forsterite crystals doped with Ti 4 þ [22], the CL signal shows two broad emissions in the same region as Ti-doped enstatite spectra and in any case they are located at values different from 800 nm, the value attributed to the Ti 3 þ ion in forsterite by Shenjun et al [28].…”

Section: Resultsmentioning

confidence: 92%

See 1 more Smart Citation

Flux growth and characterization of Ti- and Ni-doped enstatite single crystals

Bloise

Pingitore

Miriello

et al. 2011

Journal of Crystal Growth

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Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 92%

Flux growth and characterization of Ti- and Ni-doped enstatite single crystals

Bloise

Pingitore

Miriello

et al. 2011

Journal of Crystal Growth

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“…According to earlier experimental studies [22], K Cr = 0.18 for crystals containing chromium mainly in the form of Cr 3+ ions (at = 10 -4 ). Note that, according to Shenjun et al [23], forsterite crystals grown in an inert atmosphere contain titanium mainly in the form of Ti 4+ ions.…”

Section: Experimental Determination Of the Forsterite-melt Partitionmentioning

confidence: 98%

Crystal-Melt Partition Coefficients of Impurities in Forsterite, Mg2SiO4: Experimental Determination, Crystal-Chemical Analysis, and Thermodynamic Evaluation

2005

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The forsterite-melt partition coefficients ä are determined experimentally for a large number of mono-, di-, tri-, and tetravalent impurities. The energies of native defects and impurities ( E d ) and the solution energies ( E s ) of impurities in forsterite are evaluated using computer simulation. The defect energy is shown to vary linearly with the difference in ionic radius between the host and substituent atoms ( ∆ r ) and with the impurity cation charge, while the partition coefficient and solution energy of impurities are quadratic functions of these parameters. The plots of ln K versus ( ∆ r ) 2 and E s versus ( ∆ r ) 2 for isovalent substitutions ( and ) pass close to the origin, in contrast to the plots for heterovalent substitutions ( and ). The significant y intercept of the latter plots is interpreted as evidence for the formation of extra defects maintaining electroneutrality. The y intercept of the plot of E s versus ( ∆ r ) 2 is 2 eV, which is about half the formation energy of Frenkel defects in forsterite. The best fit equations representing the correlation between the partition coefficients and solution energies of impurities demonstrate that heterovalent substitutions increase the entropy contribution to the free energy of solution of impurities. Me Mg × Me Si × Me Mg ' Me Si . 628 INORGANIC MATERIALS Vol. 41 No. 6 2005 DUDNIKOVA et al .

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“…In addition, the ionic radius of Al 3+ (0.535 Å) is much smaller than that of Ti 3+ (0.67 Å), which leads to a very small effective segregation coefficient of Ti 3+ ions in Ti 3+ :Al 2 O 3 crystal. Therefore, a lot of other Ti-doped crystals have also been widely studied as well, including Ti 3+ :BeAl 2 O 4 , Ti 3+ :MgAl 2 O 4 , Ti 3+ :YAG, Ti 3+ :Mg 2 SiO 4 , etc. Unfortunately, the segregation coefficients of Ti 3+ ions in these crystals were still much less than 1, while the thermal conductivities were worse than Ti 3+ :Al 2 O 3 .…”

Section: Introductionmentioning

confidence: 99%

Ti-Doped β-Ga₂O₃: A Promising Material for Ultrafast and Tunable Lasers

Jia

Cittadino

et al. 2018

Crystal Growth & Design

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As we know, Ti3+:Al2O3 is a very famous crystal for ultrafast and tunable lasers. However, it also has disadvantages including small segregation coefficient and short fluorescence lifetime of Ti3+. For comparison, Ti-doped β-Ga2O3 (Ti3+:β-Ga2O3) single crystals with good spectral properties have been designed and grown successfully by edge-defined film-fed growth method with larger segregation coefficient and longer fluorescence lifetime. The segregation coefficient of Ti3+ ions in the Ti3+:β-Ga2O3 crystal was calculated to be 0.49, which was much larger than that in Ti3+:Al2O3 (0.2). The thermal conductivity of Ti3+:β-Ga2O3 crystal was measured to be 24.7 W/mK along the ⟨010⟩ direction at room temperature, which is very attractive as a laser crystal. Furthermore, the polarized absorption spectra and fluorescence spectra of Ti3+:β-Ga2O3 were measured and analyzed. The full width at half-maximum of the emission peak was as large as 140 nm. The fluorescence lifetime was up to 176 ± 5 μs, which was about 50 times longer than that of Ti3+:Al2O3. All the properties indicate that Ti3+:β-Ga2O3 is a potential material for ultrafast and tunable laser applications.

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Growth and characteristics of Mg2SiO4: Ti crystal

Cited by 8 publications

References 8 publications

Flux growth and characterization of Ti- and Ni-doped enstatite single crystals

Flux growth and characterization of Ti- and Ni-doped enstatite single crystals

Crystal-Melt Partition Coefficients of Impurities in Forsterite, Mg2SiO4: Experimental Determination, Crystal-Chemical Analysis, and Thermodynamic Evaluation

Ti-Doped β-Ga₂O₃: A Promising Material for Ultrafast and Tunable Lasers

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Growth and characteristics of Mg2SiO4: Ti crystal

Cited by 8 publications

References 8 publications

Flux growth and characterization of Ti- and Ni-doped enstatite single crystals

Flux growth and characterization of Ti- and Ni-doped enstatite single crystals

Crystal-Melt Partition Coefficients of Impurities in Forsterite, Mg2SiO4: Experimental Determination, Crystal-Chemical Analysis, and Thermodynamic Evaluation

Ti-Doped β-Ga2O3: A Promising Material for Ultrafast and Tunable Lasers

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Ti-Doped β-Ga₂O₃: A Promising Material for Ultrafast and Tunable Lasers