IR transmission and properties of glasses in the TeO2−RnOm, RnXm, Rn(SO4)m, Rn(PO3)mandB2O3] systems

Bürger, H.; Vogel, W.; Kozhukharov, V.

doi:10.1016/0020-0891(85)90114-9

Cited by 156 publications

(47 citation statements)

References 21 publications

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“…Tellurite glasses have scientific and technological interest due to their attractive physical properties such as low melting points, high dielectric constant [1,2], high refractive index [2] and good infrared transmissivity [3]. The refractive indices allow the utilization of these glasses for non-linear optical materials [4] and the phonon energies have at least two important consequences, the improved infrared transmission up to 6 μm and the low multiphonon decay rates compared to other network oxide glasses.…”

Section: Introductionmentioning

confidence: 99%

Structural investigations of the xTeO2–(1−x)GeO2 (x=0, 0.2, 0.4, 0.6, 0.8 and 1) tellurite glasses: A composition dependent Raman spectroscopic study

Kalampounias

Nasikas

Papatheodorou

2011

Journal of Physics and Chemistry of Solids

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Section: Introductionmentioning

confidence: 99%

Structural investigations of the xTeO2–(1−x)GeO2 (x=0, 0.2, 0.4, 0.6, 0.8 and 1) tellurite glasses: A composition dependent Raman spectroscopic study

Kalampounias

Nasikas

Papatheodorou

2011

Journal of Physics and Chemistry of Solids

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“…Although fluoride glasses have even lower phonon energies which allow weak self-quenching as shown for the Nd 3+ case by Michel et al [5], they lack many of the desirable features of tellurite glasses including mechanical strength and chemical durability [6]. Tellurite glasses, compared with silicate and borate and fluoride glasses, have more advantages as laser hosts due to their superior physical properties such as low melting temperature [6][7][8], high dielectric constant [9,11], high refractive index [9,10], large third order nonlinear susceptibility [12,13] and good infrared transmissivity [14]. Furthermore, they present large transparency from the near ultraviolet to the middle infrared region.…”

Section: Introductionmentioning

confidence: 99%

Effect of composition on the spontaneous emission probabilities, stimulated emission cross-sections and local environment of Tm3+ in TeO2–WO3 glass

Özen

Aydınlı

Cenk

et al. 2003

Journal of Luminescence

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Effect of composition on the structure, spontaneous and stimulated emission probabilities of various 1.0 mol% Tm 2 O 3 doped (1Àx)TeO 2 +(x)WO 3 glasses were investigated using Raman spectroscopy, ultraviolet-visible-nearinfrared (UV/VIS/NIR) absorption and luminescence measurements.Absorption measurements in the UV/VIS/NIR region were used to determine spontaneous emission probabilities for the 4f-4f transitions of Tm 3+ ions. Six absorption bands corresponding to the absorption of the 1 G 4 , 3 F 2 , 3 F 3 and 3 F 4 , 3 H 5 and 3 H 4 levels from the 3 H 6 ground level were observed. Integrated absorption cross-section of each band except that of 3 H 5 level was found to vary with the glass composition. Luminescence spectra of the samples were measured upon 457.9 nm excitation. Three emission bands centered at 476 nm ( 1 G 4 -3 H 6 transition), 651 nm ( 1 G 4 -3 H 4 transition) and 800 nm ( 1 G 4 -3 H 5 transition) were observed. Spontaneous emission cross-sections together with the luminescence spectra measured upon 457.9 nm excitation were used to determine the stimulated emission cross-sections of these emissions.The effect of glass composition on the Judd-Ofelt parameters and therefore on the spontaneous and the stimulated emission cross-sections for the metastable levels of Tm 3+ ions were discussed in detail. The effect of temperature on the stimulated emission cross-sections for the emissions observed upon 457.9 nm excitation was also discussed. r

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“…Stanworth [15] found that zirconia crucibles showed resistance to chemical attack by tellurite glasses. [16] demonstrated the need for bubbling the melt with oxygen in order to prevent reduction of the oxides into metals in the case of phosphotellurite glasses. Bubbling was deemed unnecessary with the temperatures and compositions tested in this study.…”

Section: Key Observations From Fy2010 Literature Surveymentioning

confidence: 99%

“…Bürger et al [16] investigated the infrared (IR) transmission and other properties of a variety of tellurite glasses. Batches (50-200 g) of reagent-grade TeO 2 and pre-dried oxides, sulfates, metaphosphates and halides were melted directly in Au and Pt crucibles (Al 2 O 3 crucibles were also used in a few cases).…”

Section: A-2 Phosphotellurite Glassesmentioning

confidence: 99%

Alternative Electrochemical Salt Waste Forms, Summary of FY2010 Results

Riley¹,

Rieck²,

Crum³

et al. 2010

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SUMMARYIn FY2009, the Pacific Northwest National Laboratory (PNNL) performed scoping studies to down-select two candidate waste forms for spent electrochemical salt, tellurite (TeO 2 -based) glasses and high-halide minerals. Both candidates showed promise with acceptable Product Consistency Test (PCT) responses (i.e., an assessment of chemical durability) and immobilization of at least 10 mass% fission product waste stream. These candidates were investigated in FY2010.Sodalite was successfully synthesized by the sol-gel method. The vast majority of the dried sol-gel consisted of sodalite with small amounts of alumino-silicates and unreacted salt. Upon firing the powders made by sol-gel, the primary phase observed was sodalite with the addition of various amounts of nepheline, carnegieite, lithium silicate, and lanthanide oxides. The amounts of sodalite, nepheline, and carnegieite varied with firing temperature, as did the bulk density of the fired pellets, sol-gel process chemistry, and the amount of glass sintering aid added to the batch. As the firing temperature was increased from 850°C to 950°C, chloride volatility increased, the fraction of sodalite decreased, and the fractions of nepheline and carnegieite increased. This indicates that the sodalite structure is not stable and begins to convert to nepheline and carnegieite under these conditions at 950°C. Density has an inverse relationship with firing temperature. The addition of NBS-1, a borosilicate glass sintering aid, had a positive effect on bulk density and increased the stability of the sodalite structure. A summary data table for FY2010 halide mineral investigations is presented in Table S1.1. Table S1.1. Summary data for FY2010 halide mineral investigations. "WL" denotes the waste loading (in mass%); "Firing T" denotes the firing temperature (in °C); For the Phase Assemblage, "S" denotes sodalite, "N" denotes nepheline + carnegieite, and "L" denotes lithium silicate phases determined by Xray diffraction. NL Na and NL Cl denote the sodium and chlorine normalized release, respectively, from the PCT. At the beginning of FY2010, an in-depth literature review kicked off the tellurite glasses study. The review was aimed at compiling data for chemical durability and mixed chloride incorporation for tellurite glasses. The literature review led the authors to four binary and one ternary systems for further investigation, which include TeO 2 plus the following: PbO, Al 2 O 3 -B 2 O 3 , WO 3 , P 2 O 5 , or ZnO. Each system was studied with and without a mixed-chloride simulated electrochemical salt waste stream, and the literature review provided the starting points for the baseline compositions as well as starting points for melting temperature, compatible crucible types, etc. The most promising glasses in each system were scaled up from 5 g scoping study batches to 20 g batches which were analyzed using the PCT. Both asfabricated samples and samples exposed to PCT were analyzed for phase separation or undissolved materials. Table S1.2 summarizes the result...

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IR transmission and properties of glasses in the TeO2−RnOm, RnXm, Rn(SO4)m, Rn(PO3)mandB2O3] systems

Cited by 156 publications

References 21 publications

Structural investigations of the xTeO2–(1−x)GeO2 (x=0, 0.2, 0.4, 0.6, 0.8 and 1) tellurite glasses: A composition dependent Raman spectroscopic study

Structural investigations of the xTeO2–(1−x)GeO2 (x=0, 0.2, 0.4, 0.6, 0.8 and 1) tellurite glasses: A composition dependent Raman spectroscopic study

Effect of composition on the spontaneous emission probabilities, stimulated emission cross-sections and local environment of Tm3+ in TeO2–WO3 glass

Alternative Electrochemical Salt Waste Forms, Summary of FY2010 Results

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