Preparation and grain-growth of chromia-yttrium aluminum garnet composites fibers by sol–gel method

Green-emitting Y3Al5O12: Tb phosphor materials have been widely studied because of their high luminescence efficiency and stability under the conditions of high irradiance with an electron beam. In this paper, Green-emitting phosphor of yttrium aluminum garnet (Y3Al5O12 or YAG) doped with Tb3+, Ce3+ and Gd3+ was synthesized by sol-gel method. By means of TG/DSC, XRD, and photoluminescence (PL) performance, the sintering condition and its influence on the powder’s emitting performance were studied. The experimental results showed that, Y2.8Tb0.12 Ce0.08-x GdxAl5O12 synthesized by sol-gel method was a kind of phosphor of good performance. When the value of x was set at 0.04, the best emitting performance was obtained. The Y3Al5O12: Tb, Ce, Gd particles had fine size, spherical shape, filled morphology, high crystallinity, and good brightness.

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Kinetics and formation mechanism of yttrium aluminum garnet from an amorphous phase prepared by the sol–gel method

Ceramics International ◽

10.1016/j.ceramint.2015.04.161 ◽

2015 ◽

Vol 41 (9) ◽

pp. 10616-10623 ◽

Cited By ~ 8

Author(s):

Alexander M. Kutyin ◽

Elena Ye. Rostokina ◽

Evgeny M. Gavrishchuk ◽

Victor V. Drobotenko ◽

Alexander D. Plekhovich ◽

...

Keyword(s):

Amorphous Phase ◽

Formation Mechanism ◽

Yttrium Aluminum Garnet ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method ◽

Yttrium Aluminum

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Preparation, microstructure and properties of yttrium aluminum garnet fibers prepared by sol–gel method

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2008.07.025 ◽

2009 ◽

Vol 113 (1) ◽

pp. 31-35 ◽

Cited By ~ 28

Author(s):

Chengshun Li ◽

Yujun Zhang ◽

Hongyu Gong ◽

Jingde Zhang ◽

Lifang Nie

Keyword(s):

Yttrium Aluminum Garnet ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method ◽

Microstructure And Properties ◽

Yttrium Aluminum

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Preparation and Characterization of Epitaxial KNBO3 Thin Films by a Sol-Gel Method

MRS Proceedings ◽

10.1557/proc-310-325 ◽

1993 ◽

Vol 310 ◽

Cited By ~ 4

Author(s):

Hidehiro Endo ◽

M. J. Cima

Keyword(s):

Thin Films ◽

Heat Treatment ◽

Grain Growth ◽

Sol Gel ◽

Soaking Time ◽

Gel Method ◽

Sol Gel Method ◽

Sol Gel Process ◽

Surface Morphologies

AbstractEpitaxial formation of KNbO3 films on several substrates was examined. The films were prepared by a sol-gel process using potassium ethoxide and niobium pentaethoxide. Hetero-epitaxial KNbO3 films with (100) orientation were successfully obtained both on MgO (100) and SrTiO3 (100) substrates by heat treatments above 700°C, while polycrystalline KNbO3 were formed on Si (111) substrates. Higher temperatures and extended soaking time promoted the grain growth of KNbO3 and KNbO3 films with improved surface morphologies (smoother surfaces) could be obtained by controlling heat treatment parameters.

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A rietveld study of the cation substitution between uvarovite and yttrium-aluminum synthetic garnets, obtained by sol-gel method

Crystal Research and Technology ◽

10.1002/crat.2170290320 ◽

1994 ◽

Vol 29 (3) ◽

pp. 387-391 ◽

Cited By ~ 9

Author(s):

J. Carda ◽

M. A. Tena ◽

G. Monros ◽

V. Esteve ◽

M. M. Reventos ◽

...

Keyword(s):

Sol Gel ◽

Cation Substitution ◽

Gel Method ◽

Sol Gel Method ◽

Yttrium Aluminum

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Effect of alumina incorporation on restricting grain growth of nanocrystalline tin(IV) oxide

Open Chemistry ◽

10.2478/s11532-009-0137-5 ◽

2010 ◽

Vol 8 (2) ◽

pp. 331-340 ◽

Cited By ~ 6

Author(s):

Y. Al-Angari ◽

M. Kadi ◽

I. Ismail ◽

Mohamed. Gabal

Keyword(s):

Crystallite Size ◽

Surface Area ◽

Grain Growth ◽

Sol Gel ◽

Average Crystallite Size ◽

Pure Sno2 ◽

Gel Method ◽

Sol Gel Method ◽

Coated Materials ◽

Average Grain Size

AbstractIn this project, nanocrystalline SnO2 powders were successfully prepared by (a) citrate sol-gel and (b) direct precipitation methods. Powders were characterized using thermal analysis techniques (DTA-TG-DSC), X-ray powder Diffraction (XRD), surface area (BET) and electrical conductivity measurements. XRD patterns showed the presence of the cassiterite structure. SnO2 particles, prepared through sol-gel method exhibit crystallite sizes in the range from 3.1 to 22.3 nm when the gel is heat treated at different temperatures up to 900°C. SnO2 nanocrystallites prepared by the precipitation method are comparatively larger in size. The higher specific surface area was obtained for the powder prepared using sol-gel method and the obtained average grain size (d) is relatively large compared with that of the average crystallite size. The powders show a semiconducting behavior with increasing temperature. The higher conductivity obtained for SnO2 prepared by sol-gel method can be attributed to their smaller average crystallite size. XRD of alumina doped powder exhibits finer particles than pure SnO2. TEM images showed that the particles are spherical in shape and consist of a core of SnO2 surrounded by a coating of alumina. The calculated surface area was found to decrease with temperature increases. Due to the effective role of Al2O3 additive as a grain growth inhibitor for the matrix grains, the observed surface area for the coated materials are predominantly higher than for the uncoated materials.

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