scholarly journals Synthesis and characterization of yttrium nitrate hexahydrate

2021 ◽  
Vol 1065 (1) ◽  
pp. 012019
Author(s):  
R Madhusudhana ◽  
S Lovesome Benedict ◽  
L. Krishnamurthy ◽  
R Gopalakrishne Urs ◽  
L Vinaykumar
Keyword(s):  
Synthesis And Characterization ◽  
Nitrate Hexahydrate ◽  
Yttrium Nitrate ◽  
Yttrium Nitrate Hexahydrate

Synthesis and Characterization of Nanocrystalline ZnO Powders by a Direct Thermal Decomposition Route Using Zinc Nitrate Hexahydrate

2013 ◽  
Vol 770 ◽  
pp. 68-71 ◽  
Author(s):  
Supphadate Sujinnapram ◽  
Uraiphorn Termsuk ◽  
Atcharawan Charoentam ◽  
Sutthipoj Sutthana
Keyword(s):  
Thermal Decomposition ◽  
Crystallization Temperature ◽  
Zinc Nitrate ◽  
Zinc Nitrate Hexahydrate ◽  
Absorption Peak ◽  
Synthesis And Characterization ◽  
Nitrate Hexahydrate ◽  
Different Temperatures ◽  
Zno Powders

The nanocrystalline ZnO powders were synthesized by a direct thermal decomposition using zinc nitrate hexahydrate as starting materials. The precursor was characterized by TG-DTA to determine the thermal decomposition and crystallization temperature which was found to be at 325 oC. The precursors were calcined at different temperatures of 400, 500, and 600°C for 4 h. The structure of the prepared samples was studied by XRD, confirming the formation of wurtzite structure. The synthesized powders exhibited the UV absorption below 400 nm (3.10 eV) with a well defined absorption peak at around 285 nm (4.35 eV). The estimated direct bandgaps were obtained to be 3.19, 3.16, and 3.14 eV for the ZnO samples thermally decomposed at 400, 500, and 600°C, respectively.

The role of cerium(iii)/yttrium(iii) nitrate hexahydrate salts on electroactive β phase nucleation and dielectric properties of poly(vinylidene fluoride) thin films

RSC Advances ◽  
2015 ◽  
Vol 5 (36) ◽  
pp. 28487-28496 ◽  
Author(s):  
Pradip Thakur ◽  
Arpan Kool ◽  
Biswajoy Bagchi ◽  
Nur Amin Hoque ◽  
Sukhen Das ◽  
...  
Keyword(s):  
Thin Films ◽  
Dielectric Properties ◽  
Vinylidene Fluoride ◽  
Nitrate Hexahydrate ◽  
Yttrium Nitrate ◽  
Β Phase ◽  
Poly Vinylidene Fluoride ◽  
Phase Nucleation ◽  
Yttrium Nitrate Hexahydrate

Electroactive β phase nucleation in cerium/yttrium nitrate hexahydrate salt modified PVDF thin filmsviaformation of hydrogen bonds.

Synthesis and Characterization of Graphene/Zinc Oxide Nanocomposites

2017 ◽  
Author(s):  
Nurettin Sezer ◽  
Adnan Ali ◽  
Muataz A. Atieh ◽  
Muammer Koc
Keyword(s):  
Zinc Oxide ◽  
Average Particle Size ◽  
Zinc Nitrate ◽  
Synthesis And Characterization ◽  
Average Particle ◽  
Nitrate Hexahydrate ◽  
Gravimetric Analysis ◽  
Impregnation Method ◽  
Materials Used

This study investigates the synthesis and characterization of graphene/zinc oxide nanocomposites. Wet impregnation method was employed for the synthesis. Firstly, graphene nanoplatelets and zinc nitrate hexahydrate were concurrently dispersed in ethanol and subjected to sonication for 1 h. Then, the dispersion was put in a furnace at 70 °C overnight. The paste was then collected and heated further up to 400 °C in air for a duration of 4 h. The process was proceeded to yield insoluble nanocomposites. The synthesis was followed by characterization of the nanocomposite samples by Field Emission Scanning Electron Microscopy (FESEM), X-Ray Diffraction (XRD) and Thermal Gravimetric Analysis (TGA). The XRD pattern revealed the presence of ZnO crystals and graphene. The FESEM images showed that ZnO crystals with average particle size of 30 nm are uniformly distributed on graphene surfaces. According to the TGA result, the content of nanocomposites is in good agreement with the materials used during synthesis.

Synthesis of Dispersed Y2O3 Nanopowder from Yttrium Stearate

2013 ◽  
Vol 544 ◽  
pp. 3-7 ◽  
Author(s):  
Jin Sheng Li ◽  
Xu Dong Sun ◽  
Shao Hong Liu ◽  
Di Huo ◽  
Xiao Dong Li ◽  
...  
Keyword(s):  
Particle Size ◽  
Raw Materials ◽  
Average Particle Size ◽  
Ceramic Materials ◽  
Average Particle ◽  
Water Medium ◽  
Nitrate Hexahydrate ◽  
Yttrium Nitrate ◽  
Ft Ir ◽  
Yttrium Nitrate Hexahydrate

Fine yttrium stearate powder was produced at a relatively low temperature using yttrium nitrate hexahydrate, ammonia and stearic acid as the raw materials. Dispersed Y2O3 nanopowder was synthesized by calcining the yttrium stearate. The formation mechanism of the precursor and the Y2O3 nanopowder was studied by means of XRD, TG-DTA, FT-IR, BET, FE-SEM and HR-TEM. Pure and dispersed Y2O3 nanopowder with an average particle size of 30 nm was produced by calcining the precursor at 600 °C. The particle size increases to about 60 nm with the increase of the calcination temperature to 1000 °C. In the preparation of Y2O3 from yttrium stearate, no water medium is involved, thus capillarity force and bridging of adjacent particles by hydrogen bonds can be avoided, resulting in good dispersion of the particles. The dispersed Y2O3 nanopowder prepared in this work has potential application in phosphors and transparent ceramic materials.

Photochemical Metal Organic Deposition of Patterned Nanostructured Oxide Films

2005 ◽  
Vol 901 ◽  
Author(s):  
Xin Zhang ◽  
Ross Hill
Keyword(s):  
Tantalum Oxide ◽  
Oxide Films ◽  
Reaction Rates ◽  
Auger Spectroscopy ◽  
Nitrate Hexahydrate ◽  
Yttrium Nitrate ◽  
Nanostructured Oxide ◽  
Metal Organic ◽  
Metal Organic Deposition ◽  
Yttrium Nitrate Hexahydrate

AbstractIn this paper, we present examples of the use of photochemical metal organic deposition to form nanostructured metal oxide films. In the first example, we use two reactions with very different reaction rates to control the nanostructuring, utilizing tantalum (V) tetraethoxide acetylacetonate (as a thermally reactive source of tantalum oxide) and manganese (II) 2-ethylhexanoate (as a photochemically reactive source of manganese oxide). We prepare homogeneous precursor films of tantalum (V) tetraethoxide acetylacetonate and manganese (II) 2-ethylhexanoate and in the dark allow the tantalum complex to react forming tantalum oxide regions. The film is then exposed and the manganese complex is converted to a matrix surrounding the tantalum regions. The resultant structures are characterized by electron microscopy, energy dispersive X-ray spectroscopy and Auger spectroscopy. In the second example, we use two immiscible precursors, zirconium (IV) 2-ethylhexanoate and yttrium nitrate hexahydrate to form nanostructured precursor films. The nanostructuring of these films is apparent from SEM studies. Exposure of these films results in the formation of nanostructured films consisting of a zirconium oxide matrix with encapsulated yttrium oxide.

scholarly journals Green Synthesis and Morphology of Nano Yttria Mediated by Agaricus bisporus

2019 ◽  
Vol 31 (4) ◽  
pp. 834-838
Author(s):  
K.B. Satishkumar ◽  
T.K. Vishnuvardhan ◽  
B. Rajashekhar ◽  
K. Satish ◽  
Shashidhar ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Crystallite Size ◽  
Acid Medium ◽  
Yttrium Oxide ◽  
Agaricus Bisporus ◽  
Nitrate Hexahydrate ◽  
Yttrium Nitrate ◽  
Reaction Products ◽  
Hall Method ◽  
Yttrium Nitrate Hexahydrate

Nano-yttrium oxide has been synthesized from yttrium nitrate hexahydrate by combustion of Agarics bisporus (mushroom) used as fuel. The precursor yttirium nitrate and fuel in acid medium are combusted in furnace at 400 ºC for 3 h yields yttria nanopowder. Morphology of the reaction products are characterized by SEM and TEM. Synthesized yttria nanoparticle are characterized by UV, FTIR, XRD and EDAX are discussed. The crystallite size obtained nano yttria particles are calculated by Scherer′s equation and compared with Williamson-Hall method.

scholarly journals Synthesis of highly porous Al2O3-YAG composite ceramics

2016 ◽  
Vol 48 (3) ◽  
pp. 303-315
Author(s):  
Adela Egelja ◽  
Jelena Majstorovic ◽  
Nikola Vukovic ◽  
Miroslav Stankovic ◽  
Dusan Bucevac
Keyword(s):  
Sintering Temperature ◽  
Water Solution ◽  
Nitrate Hexahydrate ◽  
Yttrium Nitrate ◽  
Aluminium Nitrate ◽  
Composite Ceramics ◽  
X Ray ◽  
Highly Porous ◽  
Yttrium Nitrate Hexahydrate ◽  
Aluminium Nitrate Nonahydrate

Al2O3-YAG composite was obtained by sintering of porous Al2O3 preforms infiltrated with water solution of aluminium nitrate nonahydrate, Al(NO3)3?9H2O and yttrium nitrate hexahydrate, Y(NO3)3?6H2O. Al2O3 preforms with porosity varying from 26 to 50% were obtained after sintering at temperature ranging from 1100 to 1500?C. Sintering of the infiltrated Al2O3 preforms led to formation of YAG particles due to reaction between Y2O3 and Al2O3 at high temperature. It was found that variation of porosity of alumina preforms and sintering temperature is an effective way to fabricate Al2O3-YAG composite with an unusual combination of properties. Open porosity was in the range 15-35%, specific surface was 0.6-6.1 m2/g, pore size was 150-900 nm whereas compressive strength was from 50 to 250 MPa. The effect of sintering temperature on YAG formation and phase composition were investigated using X-ray diffractometry whereas microstructure of the composite was analysed by scanning electron microscopy.

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