Formation of coloring complexes in glass colored with cerium and titanium oxides

Трусова, Е. Е.; Бобкова, Н. М.; Гурин, В. С.; Горбачук, Н. И.

doi:10.1007/s10717-007-0086-4

Cited by 12 publications

(9 citation statements)

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“…This work is a continuation of previous studies [4] but with a substantially expanded range of concentrations of the added elements and using photoluminescence and x-ray photoelectron spectroscopy (XPES).…”

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confidence: 89%

“…The XPES method can give additional information, independent of optical methods, about the valence state of these as well as other elements present in the glasses. In the present work XPES results are presented only for one sample (CeO 2 : TiO 2 = 1.0 : 6.5), where the ratio CeO 2 : TiO 2 corresponds to that in glass with the most intense color [4], and according to the optical data presented above change of the cerium concentration have only a negligible effect. Glass with such composition can be regarded as representative for both series, presented in optical investigations, with 1.5 -1.0% CeO 2 .…”

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confidence: 96%

“…3a ), which could attest to the presence of silicon states which are different from the usual state for SiO 2 and shifted in the direction of lower bonding energies. Such changes in the position of the Si 2p line show that a partial chemical interaction occurs between the glass matrix and color centers formed; the nature of this interaction needs further study, since up to now, according to data obtained by other methods (for example, IR spectroscopy [4]) virtually no changes have been observed in the absorption bands of SiO 2 in the glass matrix indicated. The decrease of the binding energy of the levels Si 2p as compared to the energy characteristic for SiO 2 [5] can be attributed to the formation of Ti -O -Si and Ce -O -Si groupings; if such groupings arise, the effective degree of oxidation of some silicon atoms will be somewhat lower than in SiO 2 and alkali silicates.…”

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Nature of color centers in silicate glasses with additions of cerium and titanium oxides

et al. 2009

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Translated from Steklo i Keramika, No. 7, pp. 9 -13, July, 2009. Silicate glasses with additions of cerium and titanium oxides are studied. Such glasses are of interest for manufacturing electric lights for automobile headlights and heat-stable light filters. It is established that the characteristic yellow-orange color is due to the formation chromophoric centers containing products from the interaction of cerium and titanium oxides. It is proposed on the basis of optical transmission and photoluminescence measurements as well as XPES data obtained for the composition used in light filters that titanium and cerium are present predominately as the ions Ti 4+ , Ce 3+ , and Ce 4+ .The topicality and importance of the problem of developing new optical materials in the glass industry are due to the possibility of controlling their colorimetric characteristics. The glasses must function reliably and keep their optical properties. Examples are glasses for electric lights in automobile headlights, light filters, and other light-engineering articles. The introduction of transition and rare-earth elements capable of coloring the glass matrix as added compounds is one method that is often used to obtain different color hues of glass [1], but such problems are mainly solved empirically. Transition and rare-earth elements introduced into glass can be in the form of ions and chromophoric centers with different composition or they can form small clusters of atoms and nanocrystalline phases (oxides, chalcogenides (provided chalcogens are introduced), and others).All this makes it necessary to investigate in greater detail the physical -chemical aspects of the state of the form in which heavy elements -in the present work, cerium and titanium -are present in glasses.Glasses with a combination of CeO 2 and TiO 2 additions are one promising variant of optical materials for manufacturing near-UV and visible range light filters [2, 3]. The particulars of the electronic structure of cerium and titanium ions make selective absorption possible, and when these ions are present together double oxides can form and the lowest valence states can be stabilized, thereby expanding the optical and functional properties of the glasses.The present work is devoted to the synthesis and investigation of the properties of silicate glasses when the additions are in the form of combinations of cerium and titanium oxides in a wide range of molar ratios in order to determine the states of these elements in the glasses and to clarify the possible nature of the chromophoric centers which are formed. This work is a continuation of previous studies [4] but with a substantially expanded range of concentrations of the added elements and using photoluminescence and x-ray photoelectron spectroscopy (XPES).A glass matrix based on the aluminosilicate bariumstrontium glass-forming system SiO 2 -Al 2 O 3 -MgO -CaOBaO -SrO -Na 2 O -K 2 O -Li 2 O was used. Two series of glasses with the TiO 2 content varying from 0 to 25% 5 were chosen for these investigations: 1 -...

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Nature of color centers in silicate glasses with additions of cerium and titanium oxides

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“…the automobile's yellow bulbs [36]. In combination with titanium oxide, it provides a desirable yellow colour of glass without creating a need for a strongly reduced glass, which is required when the production of yellow glass is provided via sulphides (e.g.…”

Section: Arsenic Oxide Antimony Oxide and Cerium Oxidementioning

confidence: 99%

“…• the reactions of sulphate and other fining compounds in the melt affect the glass colour and other properties of glass [35][36][37][38][39][40].…”

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confidence: 99%