Characterization of Gradual Porous Ceramic Structures ...

2012-4-1  Zirconium silicate (ZrSiC 4) particles were used for the manufacturing of the porous supports, and mullite powder was deposited by sedimentation in order to achieve the active layer with pores size gradient. The used powders and the obtained structures were characterized by laser scattering particle size analyzer, scanning electron microscopy ...

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Characterization of Gradual Porous Ceramic Structures ...

2021-7-9  Zirconium silicate (ZrSiO 4) ... Ioan Vida-Simiti, Nicolaie Jumate, Valentin Moldovan, Gyorgy Thalmaier, Niculina Sechel. Characterization of Gradual Porous Ceramic Structures Obtained by Powder Sedimentation[J]. J Mater Sci Technol, 2012, 28(4): 362-366. share this article. 0

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High-k dielectric oxides obtained by PLD as solution for ...

2007-7-31  Zirconium silicate (ZrSi x O y) is a material formed by combination of a high-k dielectric oxide (ZrO 2) with a low-k dielectric oxide (SiO 2). This new compound presents thermodynamic stability on the silicon wafer. It has been shown that dielectric constant is related to the Zr concentration in the silicate films.

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High-k dielectric oxides obtained by PLD as solution for ...

The aim of this work was to find the suitable high-k dielectric compound to be used as gate dielectric in MOS devices. Thin films of zirconia (ZrO 2), zirconium silicate (ZrSi x O y), hafnia (HfO 2) and hafnium silicate (HfSi x O y) with thickness in the nanometer range have been obtained by pulsed laser deposition (PLD), assisted or not by radio-frequency discharge.

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(PDF) Influence of Substrate Biasing on the Structural and ...

Thin films of zirconia (ZrO2), zirconium silicate (ZrSixOy), hafnia (HfO2) and hafnium silicate (HfSixOy) with thickness in the nanometer range have been obtained by pulsed laser deposition (PLD ...

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(PDF) One pot synthesized Li, Zr doped porous silica ...

Mesoporous zirconium silicate was used as supports of Co catalysts for Fischer–Tropsch (F–T) synthesis in a slurry phase, and the effect of zirconium in the silicate framework on the catalytic ...

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STUDY ON THERMAL BEHAVIOUR, STRUCTURE AND

2016-1-29  * Zirconium Silicate Signum Ceramis Heraeus-Kulzer, Hanau,Germany SC Nano-hybrid Resin based on multifunctional methacrylic esters Glass-ceramic filler (73 wt%) *NP- Silica *FP-Inorganic filler *Composition according to references [16,17] for Premise Indirect, [18-20 ] for Gradia, [ 21, 22 ] for

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Influence of Substrate Biasing on the Structural and ...

2009-10-28  For instance, an intermediate zirconium silicate (ZrSi x O y) layer with high zirconium amount results in higher dielectric constant. 6 Also, the evolution of the zirconia structure from cubic phase to monoclinic one enhances the dielectric response of the material. 3 Finally, it is believed that the application of a negative bias toward the Si ...

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Blue zircon meaning - New update 2021 - Great video

Natural zircon is a mineral belonging to the group of nesosilicates. Its chemical name is zirconium silicate and its also corresponding chemical formula is ZrSiO4. Zircon forms in silicate melts with large proportions of high field strength incompatible elements. For example, hafnium is almost always present in quantities ranging from 1

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(PDF) One pot synthesized Li, Zr doped porous silica ...

Mesoporous zirconium silicate was used as supports of Co catalysts for Fischer–Tropsch (F–T) synthesis in a slurry phase, and the effect of zirconium in the silicate framework on the catalytic ...

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(PDF) Influence of Substrate Biasing on the Structural and ...

Thin films of zirconia (ZrO2), zirconium silicate (ZrSixOy), hafnia (HfO2) and hafnium silicate (HfSixOy) with thickness in the nanometer range have been obtained by pulsed laser deposition (PLD ...

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Influence of Substrate Biasing on the Structural and ...

2009-10-28  For instance, an intermediate zirconium silicate (ZrSi x O y) layer with high zirconium amount results in higher dielectric constant. 6 Also, the evolution of the zirconia structure from cubic phase to monoclinic one enhances the dielectric response of the material. 3 Finally, it is believed that the application of a negative bias toward the Si ...

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Natural pink zircon. Amazing beauty. New update 2021 -

Zircon also has impressive fire, with a dispersion rating nearly as high as diamond. Found in a range of colors, including blue, red, pink, orange, honey, green and white, it makes very attractive jewelry indeed. Gemologically, it is a zirconium silicate by chemical composition, with a

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(PDF) Microscopic and Spectroscopic Analysis of Interface ...

Zr is detected in all samples by PAA because generally the filling particles are either barium silicate Limestone, quartz or zirconium silicate, frequently integrated with very small-sized particles ...

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Microwave-assisted aqua regia digestion for determining ...

2012-3-1  However, the results indicate that, for the total digestion of all silicate compounds, the amount of HF in the digestion should be much higher. For example, according to the results obtained by Moldovan et al. [7] , SRM 2557 can be completely decomposed using two-step power-controlled microwave digestion, with 4 ml HNO 3 and 5 ml of HCl + HF (7 ...

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Influence of Substrate Biasing on the Structural and ...

Chemical environment of zirconium and oxygen atoms was analyzed by X-ray photoelectron spectroscopy (XPS). The spectra wererecordedwithaScienta-ESCA200instrumentequippedwitha hemispherical analyzer and a monochromatic Al Ka (1486.6eV) source. The C 1s, O 1s, Zr 3d, and the plasmon loss peaks were acquired with a 0.4eV energy resolution. After a ...

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Radiation exposure to zircon minerals in Serbian ceramic ...

2019-8-31  According to its composition, zircon minerals are in the form of zirconium silicate (ZrSiO 4), or zircon sand. For zircon crystals, various impurities can be related, as some radionuclides from the 238 U and 232 Th series, and may have an increased level of radioactivity [7, 13, 14].

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Evaluation of the radiopacity of selected calcium-silicate ...

Hrab D, Chisnoiu AM, Badea ME, Moldovan M, Chisnoiu RM. Comparative radiographic assessment of a new bioceramic-based root canal sealer. Clujul Med 2017;90(2):226-30. Khalil I, Naaman A, Camilleri J. Properties of tricalcium silicate sealers. J Endod 2016;42(10):1529-35.

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Endodontic sealers based on calcium silicates: a ...

2018-12-15  Cements based on a composition of calcium and silicate such as mineral trioxide aggregate [] (e.g., ProRoot MTA, Dentsply Sirona, York, USA) or Biodentine (Septodont, St. Maur-des-Fossés, France) have been introduced to modern dentistry over the past 2 decades and are well established [].Due to their excellent sealing ability and biocompatibility, these cements are used for many clinical ...

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(PDF) One pot synthesized Li, Zr doped porous silica ...

Mesoporous zirconium silicate was used as supports of Co catalysts for Fischer–Tropsch (F–T) synthesis in a slurry phase, and the effect of zirconium in the silicate framework on the catalytic ...

Get Price

Natural pink zircon. Amazing beauty. New update 2021 -

Zircon also has impressive fire, with a dispersion rating nearly as high as diamond. Found in a range of colors, including blue, red, pink, orange, honey, green and white, it makes very attractive jewelry indeed. Gemologically, it is a zirconium silicate by chemical composition, with a hardness of 7.5 on the Mohs scale.

Get Price

(PDF) Microscopic and Spectroscopic Analysis of Interface ...

Zr is detected in all samples by PAA because generally the filling particles are either barium silicate Limestone, quartz or zirconium silicate, frequently integrated with very small-sized particles ...

Get Price

Radiation exposure to zircon minerals in Serbian ceramic ...

2019-8-31  According to its composition, zircon minerals are in the form of zirconium silicate (ZrSiO 4), or zircon sand. For zircon crystals, various impurities can be related, as some radionuclides from the 238 U and 232 Th series, and may have an increased level of radioactivity [7, 13, 14].

Get Price

Evaluation of the radiopacity of selected calcium-silicate ...

Hrab D, Chisnoiu AM, Badea ME, Moldovan M, Chisnoiu RM. Comparative radiographic assessment of a new bioceramic-based root canal sealer. Clujul Med 2017;90(2):226-30. Khalil I, Naaman A, Camilleri J. Properties of tricalcium silicate sealers. J Endod 2016;42(10):1529-35.

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Radiopacity of flowable resin composite - Longdom

2019-6-24  seen that barium, ytterbium trifluoride, zirconium, and strontium are present in the filler of at least some of the seven FCRs that were assessed. A higher percentage of fillers with high atomic num-bers in dental composites leads to increased radiopacity [13]. Other dental composites are avail-Figure 3.Mean (SD) radiopacity of flowable resin

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Endodontic sealers based on calcium silicates: a ...

2018-12-15  Recently, sealers based on calcium silicates were developed as a new class of endodontic sealers. Inspired by the excellent sealing ability and biocompatibility of calcium silicate-based cements, these sealers establish a biological point of view on the obturation of root canals. No longer, the bacteria-tight seal against reinfection of the root canal is the only goal of root canal obturation ...

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Crina SUCIU, cercetător ştiinţific

2019-10-21  M. Moldovan J Optoelectron Adv M, 19 (3 ... The effect of the sodium oxide in the silicate-yttria-zirconia ... 𝒒 =3.335 32. New zirconium oxide based ceramics L. Pop, M. Zagrai, M. Rada, P. Pășcuță, R. Suciu, S. Rada, E. Culea trimis spre publicare în Ceram Int

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New urethane oligodimethacrylates with quaternary ...

2014-1-17  The aim of this study was to prepare urethane dimethacrylates containing quaternary alkyl (C16, C12) ammonium and polyethylene glycol short sequences (Mn, 400 g/mol) and to investigate their behaviour in some experimental formulations in order to evaluate their potential applicability in the dental composites field. The structure of urethane dimethacrylates has been confirmed by 1H (13C) NMR ...

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Constantin MARUTOIU Babeş-Bolyai University, Cluj

Constantin Marutoiu. This paper reports a study concerning isotopic ratios (18O/16O) of 27 commercial red wine samples from different areas of Romania produced during 2006, 2007, and 2008. The ...

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