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Thermal Spraying Yttria Powder Y2O3
Prepared using high-purity rare-earth raw materials and spheroidization granulation technology, this powder exhibits high sphericity, excellent flowability, and a high coating application rate. The resulting coatings demonstrate superior resistance to high temperatures and plasma corrosion. Yttrium oxide is an extremely important rare-earth oxide material. Although it is not as common as metallic materials, it plays an indispensable role in many advanced technological and industrial fields.
Product Description
Thermal Spraying Yttria Powder Y2O3
Prepared using high-purity rare-earth raw materials and spheroidization granulation technology, the powder exhibits high sphericity and excellent flowability. High powder loading, and the resulting coating exhibits high-temperature resistance and resistance to plasma corrosion.
Alright, let’s explore this comprehensively. Yttrium oxide ( Y₂O₃ ) Powder Performance and its fundamental applications.
Yttrium oxide is an extremely important rare-earth oxide material. Although it is not as common as metallic materials, it plays an indispensable role in many high-end technological and industrial fields.
I. Core Performance of Yttrium Oxide Powder
The performance of yttrium oxide determines its application areas; its main characteristics are as follows:
1. Extremely high melting point (> 2400℃ )
* Yttrium oxide has a melting point as high as 2425℃ It is a highly excellent high-temperature material that can maintain structural stability even in extreme thermal environments.
2. Excellent thermal stability and chemical inertness
* It is stable under high temperatures and in a wide range of atmospheric conditions, and is unlikely to decompose or react.
* Especially important is that it is compatible with many molten metals, such as titanium. You Uranium You Tantalum You Active metals) and molten silicon ( Yes ) Has Excellent corrosion resistance , it hardly reacts with it.
3. Wide-bandgap semiconductor properties
* Its bandgap width ( Band gap ) is approximately 5.6 eV It is a typical wide-bandgap semiconductor material with a high breakdown electric field and electron saturation velocity.
4. High dielectric constant ( ε ≈ 12-18 )
* This feature gives it application potential in the field of microelectronics.
5. High transparency from ultraviolet to infrared
* When prepared as single crystals or transparent ceramics, yttrium oxide exhibits a very broad transmission range. 0.23–8.0 µm ), and optically isotropic.
6. High-speed and low-phonon energy
* This feature makes it an excellent... Laser host material 。
II. Major Application Areas
Based on the unique properties mentioned above, the applications of yttrium oxide powder are primarily concentrated in the following high-tech fields: (1) As a stabilizer: the most important application
This is yttrium oxide. The largest consumption Application areas.
* Applied to zirconia ( Zirconium dioxide Thermal barrier coating ( TBCs ) ：
* In aeroengines and gas turbines, a coating needs to be sprayed onto high-temperature alloy blades. Zirconium oxide Coating for thermal insulation (thermal barrier coating).
* However, pure zirconia undergoes a phase transformation upon cooling, accompanied by volume changes that can lead to cracking and delamination of the coating.
* Add 6-8% yttrium oxide ( Y₂O₃ ) Can be formed Yttria-stabilized zirconia ( YSZ ) This ensures that the crystal structure remains stable across a wide temperature range—from room temperature to high temperatures—thus avoiding destructive phase transitions.
* YSZ It is currently the thermal barrier coating material with the best performance and widest range of applications. The vast majority of yttrium oxide is used in the production of... YSZ Powder.
(2) Refractory Materials and Crucibles
Leveraging its extremely high melting point and outstanding chemical inertness.
* Crucible for the smelting of reactive metals : Melting and smelting Titanium ( You ), zircon ( Zirconium ), hafnium ( Hf ), tantalum ( You ), uranium ( You ) A crucible for highly reactive metals. These metals, when molten, react with nearly all other oxide-based refractory materials but hardly react with yttrium oxide.
* Applications in Semiconductor Silicon Processes Crucibles and inner-wall coatings used in the casting of polycrystalline silicon ingots and the pulling of monocrystalline silicon, due to their compatibility with molten silicon ( Yes ) Possesses excellent erosion resistance.
(3) Fluorescence and Display Technologies
Leveraging its luminescent properties as a substrate.
* Phosphor matrix ： Yttrium aluminum garnet ( YAG:Y₃Al₅O₁₂ ) It is the most important laser crystal and fluorescent matrix material. When doped with different rare-earth ions, it can emit light of various colors.
* YAG:Ce³⁺ : Produces yellow light, which is white light. LED One of the core fluorescent materials (blue light) LED Chip excitation YAG:Ce Produces yellow light, which is mixed to form white light.
* Y₂O₃:Eu³⁺ It produces a vivid red fluorescence and was once widely used in the cathode-ray tubes of color televisions and displays. CRT ) in.
* OLED The thin-film encapsulation layer of the display : At high resolution OLED In display screens, an ultra-thin, defect-free encapsulation layer is required to isolate moisture and oxygen. Yttrium oxide thin films, with their high dielectric constant and excellent barrier properties, are among the ideal encapsulation materials. They are typically deposited via atomic layer deposition (ALD). ALD ) Technological preparation.
(4) Lasers and Optical Materials
* Laser crystal ： Yttrium aluminum garnet ( YAG ) It is the most widely used solid-state laser host material. When doped with neodymium ( Nd ) When ions are present, it is Nd:YAG Laser It is widely used in industrial processing, medical care, military applications, and scientific research.
* Transparent ceramic Through advanced ceramic sintering technology, it is possible to produce materials with optical properties comparable to those of single crystals. Yttrium oxide transparent ceramic They can serve as laser hosts, infrared windows, missile fairings, and optical lenses, offering advantages such as large-scale fabrication and lower costs compared to single crystals.
(5) Other Applications
* Semiconductor deposition process In semiconductor chip manufacturing, yttrium oxide thin films can serve as... High kappa Gate dielectric Candidate materials for replacing traditional silicon dioxide, enabling continued adherence to Moore’s Law and the miniaturization of device sizes.
* Catalyst In certain chemical reactions, yttrium oxide and its compounds can serve as catalysts or catalyst supports.
Summary
Feature | The applications brought by it |
Stable zirconia crystal phase | The most important application: as a thermal barrier coating ( YSZ stabilizer of ) |
High melting point & Chemically inert | High-end refractory materials: Crucible for melting active metals, semiconductor silicon processing |
As a luminescent matrix | Display and Lighting: Phosphor ( LED, Old CRT ), OLED Thin-film encapsulation |
Hypersonic & Low-energy phonon | Laser technology: YAG Laser crystals, transparent ceramics |
High dielectric constant | Microelectronics: High kappa Gate dielectric material (semiconductor) |
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