rare earth ceramic

Xenotime deposits (xenotime is a rare earth phosphate mineral which is a rich source of yttrium and heavy rare earths) in Madhya Pradesh, carbonatite-alkaline complex in Ambadongar, Gujarat, polymetallic mineralization in Siwana Ring Complex, Rajasthan (Banerjee et al., 2014) are some of the promising areas for REE exploration and …

A series of rare-earth zirconate Ln2Zr2O7 ceramics (Ln=Dy, Er, and Yb) with a fluorite structure (F-Ln2Zr2O7) were prepared by pressureless sintering from zirconia and rare-earth oxide powders at 1600°C for 10 h in air. The microstructure experiments were performed by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The …

The rare earth metals, specifically the lanthanides, produce vibrant candy-like colors in ceramic glazes. Well, if you liked what you saw in that article, but you don't fire to cone 9 or 10, you will love today's post. In this excerpt from the Technofile in the Ceramics Monthly archive, Ryan Coppage, PhD gives the low down on rare earth ...

We highlight that the TEC of these high-entropy rare-earth zirconate ceramics increases with the decrease of electronegativity difference, and the thermal …

Cerium oxide (CeO 2) in the range of 0–16 mol.% is used to enhance the joint of Ag-based filler for brazing yttria-stabilized zirconia (YSZ) ceramic in the air. Ag–CeO 2 filler is first adopted to braze YSZ ceramic (3 mol.% yttria). The CeO 2 is found to cluster at the interface of YSZ and Ag seam, improving the wetting behavior of Ag-based ...

Journal of the American Ceramic Society (JACerS) is a leading ceramics journal publishing research across the field of ceramic and glass science and engineering. Abstract A new series of rare-earth-cerate high-entropy ceramics with compositions of (La0.2Nd0.2Sm0.2Gd0.2Dy0.2)2Ce2O7 (HEC1), …

Here we show that a class of ceramics comprising the entire lanthanide oxide series, ranging from ceria to lutecia, is intrinsically …

As the temperature requirements have increased, EBCs based on rare-earth (RE) monosilicates (RESi 2 O 5), disilicates (RE 2 Si 2 O 7), and their variations, are being developed. 12,13 While most ...

Si 3 N 4 ceramics, due to their exceptional comprehensive performance, have potential applications in electronic products under the 5th generation mobile communication technology. However, their development is hindered by a lack of color variety and inherent brittleness. ... Rare earth metal (Re) oxides are used as a sintering additive to ...

The high-entropy rare-earth zirconate ((La 0.2 Nd 0.2 Sm 0.2 Gd 0.2 Yb 0.2 ) 2 Zr 2 O 7, 5RE 2 Zr 2 O 7 HEREZs) ceramics were successfully prepared by a new high-speed positive grinding strategy ...

Rare earth zirconate ceramic materials with the chemical formula Re 2 (or Ln 2) Zr 2 O 7, (where Re (Ln) is a lanthanide element or trivalent rare earth, (Dy, Gd, Nd, and La)) are a kind of ceramic materials with a generic pyrochlore structure.Recently, complex oxide structures with the chemical formula A 2 M 2 O 7, which can be in pyrochlore …

Journal of the American Ceramic Society (JACerS) is a leading ceramics journal publishing research across the field of ceramic and glass science and engineering. Abstract To improve the ability of rare-earth (RE) silicates to resist molten calcium–magnesium–aluminosilicate (CMAS) at high temperature, a novel high-entropy …

Rare-earth zirconate ceramics are a new type of oxide material with a complex structure, whose main characteristics include excellent thermal insulation …

Collectively, the rare earths rank as the 22nd most abundant "element" (at the 68th percentile mark). The non- lanthanide rare-earth elements, yttrium and scandium, are 29th and 44th, respectively, in their abundances. Lanthanum and the light lanthanides (cerium through europium) are more abundant than the heavy lanthanides ( gadolinium ...

First published: 24 May 2021. https://doi/10.1111/jace.17932. Citations: 31. Read the full text. PDF. Tools. Share. Abstract. In this study, high-entropy rare-earth tantalate …

The SEM images of RE 2 Zr 2 O 7 ceramics with different Yb 3+ doping content are displayed in Fig. 5.The calculated relative density is shown in Table 1.Due to the uncertainty of the distribution ratio of the rare-earth elements in the dual-phase sample x = 0.25, the theoretical density cannot be calculated accurately.However, according to the …

61 Citations. Explore all metrics. Abstract. The high-entropy rare-earth zirconate ( (La 0.2 Nd 0.2 Sm 0.2 Gd 0.2 Yb 0.2) 2 Zr 2 O 7, 5RE 2 Zr 2 O 7 HEREZs) …

How to maximize the extraction of heat by infrared radiation while reducing the thermal conductivity to prevent heat transfer is the main challenge of…

The rare-earth oxides settle quickly in the glaze bucket and require the use of bentonite or CMC gum in the glaze. They're refractory and aren't toxic. They're quite weak colorants and 5–10% can be added to a glaze. They're best used in alkaline glazes (which increase their solubility) on porcelain. *Note: Glazes containing barium ...

A series of rare-earth zirconate Ln 2 Zr 2 O 7 ceramics (Ln=Dy, Er, and Yb) with a fluorite structure (F-Ln 2 Zr 2 O 7) were prepared by pressureless sintering from zirconia and rare-earth oxide powders at 1600°C for 10 h in air.The microstructure experiments were performed by X-ray diffractometry (XRD) and scanning electron …

Applications of rare earth–doped SnO 2 nanostructures and rare earth stannate (Re 2 Sn 2 O 7) ceramic nanomaterials 9.3.1. Nanosensor. A nanosensor is a device with the ability to transmit information and data on the properties and features of nanostructures from macroscopic size to nanoscale.

Recent research results have demonstrated the importance of A 2 B 2 O 7 (A: stands for rare earth elements, B: stands for Zr or other element doping) type thermal insulation materials for the leading ceramic materials of upcoming thermal barrier coatings [10].The molecular structures of defective fluorite and pyrochlore are depicted in Fig. 1, …

Journal of the American Ceramic Society (JACerS) is a leading ceramics journal publishing research across the field of ceramic and glass science and engineering. Abstract High-performance colossal-permittivity (CP) materials have huge potential applications in the miniaturization of electronic components and high-energy storage …

These characteristics greatly expand the application scope of Al2O3 and Si3N4 ceramics'"-"' . 2.2 Application of rare earth oxides in non-oxide ceramics Rare earth oxides, such as Y203, CeO2, La203, and Nd203, are the main rare earth oxides used in non-oxide ceramics, playing roles of sintering aid to This is the background …

In this study, high-entropy rare-earth tantalate ceramics (Y 0.2 Ce 0.2 Sm 0.2 Gd 0.2 Dy 0.2)TaO 4 ((5RE 0.2)TaO 4) have been successfully fabricated.The possibility of formation of (5RE 0.2)TaO 4 was verified via first-principles calculations. In addition, the phase structure, ferroelastic toughening mechanism, thermophysical, and …

Rare earths are used in various types of functional ceramics, such as superconducting ceramics, piezoceramics, conductive ceramics, dielectric ceramics, and sensitive …

A new series of rare-earth-cerate high-entropy ceramics with compositions of (La 0.2 Nd 0.2 Sm 0.2 Gd 0.2 Dy 0.2) 2 Ce 2 O 7 (HEC1), (La 0.2 Nd 0.2 Sm 0.2 Gd …

The addition of rare earth element yttrium played an important role in the improvement of both mechanical properties and wear resistance of Al 2 O 3 /(W,Ti)C ceramic cutting tool material. Mechanical properties especially the fracture toughness and flexural strength were obviously increased when a suitable amount of the yttrium were …

Rare-earth oxide ceramics should find widespread applicability as robust hydrophobic surfaces. Download PDF. Similar content being viewed by others. From superhydrophilicity to …

A 2 W 3 O 12-type (A=La, Sm, Eu, Gd, RE) rare earth tungstate high-entropy ceramic powder with a positively charged surface was fabricated by a high-temperature solid-phase method, and its antibacterial and antiviral properties were evaluated for the first time.Changes in the antibacterial and antiviral activity and ionic solubility of these …

See Full PDFDownload PDF. —Barium titanate (BaTiO 3) doped with rare-earth elements (REE) is used as dielectric in the manufacture of multilayer ceramic capacitors (MLCCs). The most common REE oxide employed as dopant for this application is Y 2 O 3. The behavior of the Y 3+ in the BaTiO 3 structure depends on its concentration and the ...

A new high entropy rare earth disilicate ceramic (Lu1/8Yb1/8Sc1/8Er1/8Y1/8Ho1/8Dy1/8Tb1/8)2Si2O7: High temperature corrosion of …

In this study, novel high-entropy rare-earth iron garnet ceramics (Gd 0.2 Dy 0.2 Er 0.2 Y 0.2 RE 0.2) 3 Fe 5 O 12 (RE = Sm, Eu, Tm, Yb) were synthesised using a solid-phase method and their magnetic properties were evaluated. 2. Experimental procedure2.1. Preparation of high-entropy ceramics.

Aiming to solve this problem, a ternary rare earth co-stable zirconia ceramic (1.5Y5.5Ce0.3La-ZrO 2) was prepared by a coating method based on a co-doping strategy. The sintering process, densification evolution, mechanical properties, resistance to hydrothermal aging and biocompatibility of 1.5Y5.5Ce0.3La-ZrO 2 ceramic were studied.

The high-entropy rare-earth zirconate ((La0.2Nd0.2Sm0.2Gd0.2Yb0.2)2Zr2O7, 5RE2Zr2O7 HEREZs) ceramics were successfully prepared by a new high-speed positive grinding strategy combined with solid-state reaction method. The microstructure, crystal structure, phase composition, and …