Er- and Nd-doped yttrium aluminosilicate glasses: Preparation and characterization

Prnová, Anna; Domanická, A.; Klement, Róbert; Kraxner, Jozef; Polovka, Martin; Pentrák, Martin; Galusek, Dušan; Simurka, P.; Kozánková, Jana

doi:10.1016/j.optmat.2011.03.008

Cited by 18 publications

(5 citation statements)

References 31 publications

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“…However, the crystallization temperatures are very high (1200°C‐1500°C). Moreover, precipitation of other crystalline phases (eg, yttrium silicates) instead of YAG usually occurs . Phosphor‐embedded glass materials can also be fabricated by mixing phosphor powder with glass powder, following by forming and sintering .…”

Section: Introductionmentioning

confidence: 99%

Suppression of phosphor‐glass reactions in YAG:Ce phosphor‐embedded glasses

Shyu

Yang

2017

J Am Ceram Soc

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For high-power white LED applications, YAG:Ce-based yellow phosphors were embedded in a low-T g Bi 2 O 3 -B 2 O 5 -ZnO-Sb 2 O 5 glass (BiG) by sintering route. A high-T g silicate glass (SiG) was also used for comparison. Dense (porosity<2%) phosphor-glass composites were obtained after sintered at 800°C (for SiG) and 325°C (for BiG). XRD quantitative analysis indicates that the loss of phosphor content is in the range of 2.5%-22%, caused by partial dissolution of phosphor particles into the glass matrix during sintering. The element distribution across the interface and within the reaction zone between phosphor and glass was analyzed by TEM/SEM-EDS. The intrinsic emission characteristic of YAG:Ce is nearly not altered, possibly resulted from the slight modification of the YAG phase during sintering. Thus the final emission intensity of the sintered body is mainly determined by the residual amount of the YAG:Ce phase. Replace the high-T g SiG glass by the low-T g BiG glass, prenitridize the YAG:Ce phosphor, and change the sintering atmosphere from air to N 2 suppress the loss of phosphor during sintering. Therefore, the resulting loss of emission intensity of the phosphor-embedded glass material can be reduced to only about 1.8%. K E Y W O R D Sbismuthate glass, interface reaction, nitridizing, phosphor in glass, YAG

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Section: Introductionmentioning

confidence: 99%

Suppression of phosphor‐glass reactions in YAG:Ce phosphor‐embedded glasses

Shyu

Yang

2017

J Am Ceram Soc

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“…It is worth mentioning that Ca-Glass did not show peak crystallization temperature. The three samples showed similar thermo-mechanical properties, and in the same range of magnitude if compared to other aluminosilicate glasses [7,9,11]. …”

Section: Compositional and Microstructural Characterizationmentioning

confidence: 53%

“…Among them, rare-earth aluminosilicate and calcium aluminosilicate glasses have been studied for many years due to their high elastic modulus and hardness, high refraction index, high thermal conductivity, high glass transition temperature, excellent optical properties and good corrosion resistance [4][5][6][7][8][9][10][11]. Moreover, they are known for their ability to accommodate high concentration of rare-earth active ions such as Nd 3+ or Er 3+ as well as their low phonon energy due to the aluminate network.…”

Section: Introductionmentioning

confidence: 99%

Directional solidification, thermo-mechanical and optical properties of (Mg_xCa_1-x)_3Al_2Si_3O_12 glasses doped with Nd^3+ ions

Sola¹,

Conejos²,

Mendívil³

et al. 2015

Opt. Express

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Abstract:In this work glass rods of (Mg x Ca 1-x ) 3 Al 2 Si 3 O 12 (x = 0, 0.5 and 1) doped with 1 wt% Nd 2 O 3 were produced by the laser floating zone technique. Thermo-mechanical and spectroscopic properties have been evaluated. The three glass samples present good thermo-mechanical properties, with similar hardness, toughness and glass transition temperatures. The spectroscopic characterization shows spectral shifts in absorption and emission spectra. These spectral shifts together with JuddOfelt intensity parameters and ionic packing ratio have been used to investigate the local structure surrounding the Nd 3+ ions and the covalency of the Nd-O bond. All obtained results agree and confirm the higher covalency of the Nd-O bond in the Ca 3 Al 2 Si 3 O 12 glass. Kozankova, "Er-and Nd-doped yttrium aluminosilicate glasses: preparation and characterization," Opt. Mater. 33(12), 1872-1878 (2011 42(1-3), 189-196 (1980). -78-XX-95, 1978). 36. T. Izumitani, H. Toratani, and H. Kuroda, "Radiative and nonradiative properties of Neodymium doped silicate and phosphate glasses," J. Non-Cryst. Solids 47(1), 87-99 (1982). 37. W. F. Krupke, "Induced-emission cross sections in Neodymium laser glasses," IEEE J. Quantum Electron. QE-10(4), 450-457 (1974). 38. M. J. Weber, D. C. Ziegler, and C. A. Angell, "Tailoring stimulated emission cross sections of Nd 3+ laser glass: observation of large cross sections for BiCl 3 glasses," J. Appl. Phys. 53(6), 4344-4350 (1982 66-78 (1998). 43. R. D. Shannon, "Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides," Acta Crystallogr. A 32(5), 751-767 (1976). 44. L. A. Riesberg and M. J. Weber, "Relaxation phenomena in rare-earth luminescence," Prog. Optics 14, 89-159 (1975 5799-5811 (1978).

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“…Flame synthesis is relatively common for the synthesis of ceramic powders and nanopowders and is being increasingly utilized for the preparation of glass microspheres. This method has been demonstrated before by preparing glasses in the Al 2 O 3 –RE 2 O 3 , Al 2 O 3 –RE 2 O 3 –ZrO 2 , and Al 2 O 3 –RE 2 O 3 –SiO 2 systems, with RE = (Y, Yb, La) . The composition of the prepared glasses can be adjusted to achieve maximum chemical compatibility with the PDC.…”

Section: Introductionmentioning

confidence: 99%

Passive filler loaded polysilazane‐derived glass/ceramic coating system applied to AISI 441 stainless steel, part 1: Processing and characterization

Petríková

Parchovianský

Švančárek³

et al. 2019

Int J Applied Ceramic Tech

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This study describes an oxidation and corrosion resistant environmental barrier coating (EBC) applied to an AISI 441 stainless steel substrate. For this purpose, four polymer-derived ceramic (PDC) coating systems were developed. These coating systems consisted of a bond coat applied by dip coating, and a top-coat that was loaded with passive fillers and deposited by spray coating. The microstructures of the coatings were investigated using optical microscopy and scanning electron microscopy, including energy dispersive spectroscopy (EDS). X-ray powder diffraction (XRD) was used to investigate the phase composition of the coatings. The optimized composite top coatings were prepared from the preceramic polymer HTT1800, filled with yttria-stabilized zirconia and a specially tailored Al 2 O 3 -Y 2 O 3 -ZrO 2 (AYZ) passive filler, and commercial barium silicate glasses were used as sealing agents. After thermal treatment in air at 750°C, uniform and crack-free composite coatings on stainless steel substrates were developed, with thicknesses of up to 93 μm. Oxidation tests, which were performed at 850°C in synthetic air, showed that every tested coating system remained undamaged by oxidation and showed good bonding to the metal substrate. K E Y W O R D Senvironmental barrier coating, high-temperature oxidation, passive filler, polymer-derived ceramics

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Er- and Nd-doped yttrium aluminosilicate glasses: Preparation and characterization

Cited by 18 publications

References 31 publications

Suppression of phosphor‐glass reactions in YAG:Ce phosphor‐embedded glasses

Suppression of phosphor‐glass reactions in YAG:Ce phosphor‐embedded glasses

Directional solidification, thermo-mechanical and optical properties of (Mg_xCa_1-x)_3Al_2Si_3O_12 glasses doped with Nd^3+ ions

Passive filler loaded polysilazane‐derived glass/ceramic coating system applied to AISI 441 stainless steel, part 1: Processing and characterization

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