Yttrium Oxide Ceramic Parts

Yttrium oxide ceramics, ceramics with yttrium oxide as the main crystal phase. Is a cubic crystal system. The melting point is 2430℃, the density is 5.7g/cm3, the electrical insulation is good, the light transmittance is good, and the transmittance in the far-infrared band can reach more than 80%. The preparation of dense yttrium oxide ceramics often uses high-purity yttrium trioxide (content greater than or equal to 99.99%) as the raw material, and is prepared by sintering at a high temperature in a reducing atmosphere or vacuum after forming. Yttrium oxide ceramic parts can be used to make crucibles, infrared missile windows, fairings, radomes, scintillation detection materials, microwave equipment substrates, insulating supports, infrared generator housings, infrared lenses and high temperature windows, etc.

Zhongwei Precision is committed to providing domestic and foreign customers with advanced ceramics with high strength, high toughness, wear resistance, corrosion resistance and high temperature resistance. It is a high-tech enterprise integrating R&D, production and sales of industrial precision advanced ceramic products in the field of precision ceramics. With a variety of modern high-precision equipment, it has independently realized the completion of the entire production process of ceramic parts from ceramic powder preparation, green body molding, high temperature sintering to ceramic material finishing.

Product Description

1. Implementation standards: the company strictly implements ISO9001 certification, and the products have passed ROHS, FDA EU certification, etc.

2. Product material standards: ISO, GB, ASTM, SAE, EN, DIN, BS, AMS, JIS, ASME, DMS, TOCT, GB

3. Main processes: grouting, injection molding, tape casting, isostatic pressing, 3D printing

4. Available materials for ceramics:

It mainly produces finished ceramic rods, ceramic tubes, ceramic rings, ceramic plates, ceramic suction cups, ceramic blades and other special-shaped ceramic structures. The main ceramic materials are alumina, zirconia, silicon carbide, silicon nitride, and aluminum nitride ceramics. High temperature resistance, wear resistance, corrosion resistance, acid and alkali resistance, anti-magnetic, pressure resistance. And 3D printing, etc. are customized according to customer requirements.

Combined tube, its high wear resistance effectively resists material wear and impact.

Product Features and Developments

With the development of science and technology, making ceramics transparent is no longer a problem. At present, these polycrystalline materials with certain light transmittance are called transparent ceramics or optical ceramics in the industry. They are not only superior to traditional glass in optical performance, but also excellent in strength, hardness, corrosion resistance and high temperature resistance. , so it can be used in extremely harsh environments or in engineering design, such as defense industry, special industrial equipment, etc., and has great potential for future technological development.

Yttrium oxide has always been the focus of research in the field of transparent ceramics. It belongs to the cubic crystal system and has the isotropy of all axes of optical properties. Compared with the anisotropy of light-transmitting alumina, the image is less distorted. Lenses or military optical windows are valued and developed, and are mainly used to manufacture magnetic materials for microwaves and important materials for military industry.

Yttrium oxide ceramic parts have excellent optical and thermal properties, is a functional material with high application value, and has potential applications in high temperature windows, infrared head covers, luminescent media (scintillation, laser and upconversion luminescence) and semiconductor industries value, has now become an alternative material for single crystals. Zirconium oxide, magnesium oxide, aluminum oxide and other special ceramics can be added with yttrium oxide as a stabilizer, which can affect their densification and improve their strength and hardness.

Advanced ceramic finishing, also known as special ceramics or fine ceramics. According to the chemical composition, it is mainly divided into two categories: one is pure oxide ceramics, such as alumina, yttrium oxide, magnesium oxide ceramics, etc.; the other is non-oxide ceramics, such as carbides, borides, nitrides and silicides things etc. In the ultra-finishing of ceramic materials, the wire cutting machine has become an indispensable tool in the precision ceramic industry chain. Among them, the wire cutting machine purchased by Zhongwei Precision has high precision, the error is within 1 wire, and the handle operation is simple and easy to use. It is suitable for cutting yttrium oxide transparent ceramics that are important to high-end applications. It ensures that the edge of the finished product is smooth, free of burrs, no cracking, uniform thickness and small eccentricity.

Process After Sintering

Processing equipment: equipped with CNC engraving machine, centerless grinding, internal and external cylindrical grinding, surface grinding, CNC lathe machining center, wire cutting, turning, milling, grinding and other high-precision production and testing equipment.

Moulds and Inspection Fixtures

1. Mold service life: usually semi-permanent. (except for lost foam).

2. Mold delivery time: 10-25 days, (according to product structure and product size).

3. Tooling and mold maintenance: Zhongwei is responsible for precision parts.

Quality Control

1. Quality control: the defective rate is less than 0.1%.

2. Samples and trial run will be 100% inspected during production and before shipment, sample inspection for mass production according to ISDO standards or customer requirements.

3. Test equipment: roundness measuring instrument, three-coordinate measuring instrument, image coordinate measuring instrument, Hexagon three-coordinate measuring instrument, image measuring instrument, density measuring instrument, smoothness measuring instrument, micro Vickers hardness tester.

Application

Due to its excellent physical and chemical properties, yttrium oxide has been potentially developed in: missile infrared windows and domes, visible and infrared lenses, high pressure gas discharge lamps, ceramic scintillators, and ceramic lasers.

①High-pressure gas discharge lamp tube: Yttrium oxide has a cubic phase structure, isotropic optical properties, high chemical stability, and is resistant to corrosion by metal sodium vapor and other metal halide vapors. It has always been used in the field of high-intensity gas discharge lamps. Although progress has been made in the direction of researchers' efforts, there are still technical costs and other factors to be limited from practical application promotion.

②Window material: Materials with good optical transmission properties at 3~5μm have important applications in the military field. Although researchers have successfully developed yttrium oxide transparent ceramics with good transmittance through various sintering processes in the laboratory, However, due to the large amount of impurities contained in the current commercial nano-yttrium oxide powder, its optical properties cannot meet the actual application requirements.

③Y2O3-based scintillation ceramics: In the 1980s, researchers prepared (Y, Gd)2O3:Eu, Pr transparent ceramics by sintering. The doping of Gd2O3 increases the density of the sample and also improves its X-ray absorption coefficient. The material has high light output, short afterglow time and emission peak position matching the detector, and has been equipped as a ceramic scintillator in The X-CT produced by GE Healthcare has high commercial value in tons per year.

④Up-conversion luminescence of Y2O3 transparent ceramics: Y2O3, as an excellent matrix of luminescent materials, has been used in the fields of phosphors for lamps and electroluminescence for a long time. Studies have shown that Y2O3: also has a lower phonon energy (500㎝-1), which is comparable to the current ZBLAN glass (a fluoride glass with a phonon energy of 500㎝-1) with high upconversion efficiency. Studies have shown that transparent yttrium oxide ceramics doped with different rare earth ions exhibit good up-conversion luminescence properties under 980nm LD excitation, and achieve up-conversion emission at 420-680nm at multiple wavelengths such as blue, green, orange and red.