Color centers and luminescence in corundum crystals containing titanium

Moskvin, N. A.; Sandulenko, V. A.; Sidorova, E. A.

doi:10.1007/bf00604283

Cited by 12 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is consistent with oxidation of Ti 3+ to Ti 4+ , because Ti 4+ does not show any absorption bands in the visible range. A similar reaction has already been described for titanium-bearing synthetic corundum after annealing in an oxidizing environment by Moskvin et al (1980). The remaining peaks in spectra of our annealed samples consisted only of Cr 3+ bands which were not affected by the heat treatment process.…”

Section: Spectroscopic Propertiessupporting

confidence: 75%

See 1 more Smart Citation

Formation of large synthetic zincite (ZnO) crystals during production of zinc white

Nowak¹,

Braithwaite²,

Nowak³

et al. 2007

Journ of Gemm

View full text Add to dashboard Cite

Remarkable zincite crystals have formed as a by-product of zinc white production in Olawa Foundry, Poland. Some are of gem quality and have been faceted. Small primary crystals formed by reaction of zinc vapour with carbon dioxide from fuel burning gases leaking through faults in a diaphragm of a retort furnace. Some of these have undergone carbon monoxide-promoted and zinc vapour-assisted sublimation to form large secondary crystals. Many of these crystals are brightly coloured and transparent, and have been found up to 2 kg in weight. Most of the crystals are fluorescent in ultraviolet light.

show abstract

Section: Spectroscopic Propertiessupporting

confidence: 75%

“…It is worth mentioning that a reverse process can occur by heat treatment of synthetic titanium-bearing sapphire in a reducing atmosphere, in which Ti 4+ is transformed to Ti 3+ and the colour of the samples is intensified (Moskvin et al, 1980;.…”

Section: Spectroscopic Propertiesmentioning

confidence: 99%

Formation of large synthetic zincite (ZnO) crystals during production of zinc white

Nowak¹,

Braithwaite²,

Nowak³

et al. 2007

Journ of Gemm

View full text Add to dashboard Cite

show abstract

“…An important step of the synthesis is to anneal the crystals [5,9]. According to Viti and Ferrari [5], asterism is consistent with the presence of Ti 2+ cations formed by redox disproportionation during post-growth thermal annealing.…”

Section: Annealing Of Monocrystalsmentioning

confidence: 84%

Titanium Containing Monocrystals of Ruby and Sapphire

et al. 2011

View full text Add to dashboard Cite

The aim of this study was to obtain synthetic corundum monocrystals, called star ruby and star sapphire, using the Verneuil flame fusion process. The corundum monocrystals are known to possess an unusual complex of properties which determine their increasing application in different areas of jewelry and technology The optimal temperature-time parameters during obtaining the starting mixtures which contribute to the synthesis of high quality corundum monocrystals were established. The corundum monocrystals obtained are equivalent to the natural gemstones -rubies and sapphires.

show abstract

“…19 that pump‐induced loss depends on the pump wavelength. As shown in Figure 5(B), the charge transfer process of Ti 3+ –Ti 4+ pairs was described in detail, and the threshold of charge transfer of the ground states Ti 3+ –Ti 4+ and the ground states Ti 4+ –Ti 3+ were about 4.7 and 4.17 eV, respectively 74,75 . They also assumed the existence of excited state absorption (ESA) to further explain the pump‐induced loss.…”

Section: Laser‐diode Pumped Ti:sapphire Lasersmentioning

confidence: 99%

“…As shown in Figure 5(B), the charge transfer process of Ti 3+ -Ti 4+ pairs was described in detail, and the threshold of charge transfer of the ground states Ti 3+ -Ti 4+ and the ground states Ti 4+ -Ti 3+ were about 4.7 and 4.17 eV, respectively. 74,75 They also assumed the existence of excited state absorption (ESA) to further explain the pump-induced loss. However, based on the previous works, there is no expected ESA for Ti:sapphire, due to its simple 3d 1 configuration.…”

Section: Dual-color Laser Diodes Pumped Ti: Sapphire Oscillatorsmentioning

confidence: 99%

Review of laser‐diode pumped Ti:sapphire laser

Liu

Sun

Zheng

et al. 2021

Micro & Optical Tech Letters

View full text Add to dashboard Cite

Ti:sapphire laser has an important position in ultrashort pulse generation and wavelength tuning. The use of expensive frequency-doubled diode-pumped solid-state laser as the pump source limits the promotion of its application to a certain extent. With the maturity of high-power bluegreen laser diodes (LDs), low-cost LD directly pumped Ti: sapphire laser becomes possible. After more than 10 years of development, the output parameters of LD pumped Ti: sapphire lasers have been greatly improved. Moreover, the lasers have been applied to optical frequency combs, multiphoton microscopy imaging, and so forth, both of which have achieved impressive results.

show abstract

Color centers and luminescence in corundum crystals containing titanium

Cited by 12 publications

References 2 publications

Formation of large synthetic zincite (ZnO) crystals during production of zinc white

Formation of large synthetic zincite (ZnO) crystals during production of zinc white

Titanium Containing Monocrystals of Ruby and Sapphire

Review of laser‐diode pumped Ti:sapphire laser

Contact Info

Product

Resources

About