SUOYI zirconia toughened alumina powder (10%, 15%, 20% ZTA powder)

SUOYI zirconia toughened alumina powder (10%, 15%, 20% ZTA powder)
Zirconia toughened alumina powder (ZTA powder) ZTA is zirconia toughened alumina composite powder. It uses high-purity α-alumina as the matrix and is evenly doped with 3YSZ yttrium-stabilized zirconia nanoparticles. The zirconia grains are dispersed and distributed among the alumina grain boundaries through a wet compounding process.
Combining the two major advantages of alumina's high hardness and low cost with the phase change toughening and high toughness of zirconia, it makes up for the shortcomings of pure alumina, which is brittle and prone to cracking. It is a special raw material for mid-to-high-end wear-resistant and corrosion-resistant structural ceramics.
Conventional zirconium content is divided into 10%, 15% and 20% ZTA. The higher the zirconium content, the better the toughness and the stronger the impact resistance.

ZTA powder production and preparation process
1. Raw material ingredients
High-purity alumina powder + 3YSZ nano-zirconia powder are accurately weighed according to the proportion, and combined with deionized water, dispersant, and defoaming agent to form a slurry.
2. Wet co-grinding composite
Horizontal sand mill uses ultra-fine grinding for a long time to evenly disperse zirconium particles, avoid agglomeration and stratification, and ensure uniform microscopic composition.
3. Impurity removal and filtration
Magnetic separation removes iron impurities, and the filter screen filters large particles to eliminate black spots and pore defects in the finished product.
4. Spray granulation
The slurry is added with a binder and spray-dried to produce spherical granulated powder, which has good fluidity and is suitable for dry pressing and isostatic pressing molding.
5. Powder screening and packaging
Classify and screen, control the particle size range, detect purity, fluidity, bulk density and then package the finished product.

1. Toughness far exceeds that of pure alumina ceramics
Intergranular zirconium oxide is phase-changed and toughened, and cracks are automatically stopped when encountering zirconium particles, making it less likely to chip or break.
2. High hardness and excellent wear resistance
It retains the high hardness of alumina, low friction loss, and its service life is 2-3 times that of ordinary alumina.
3. The bending resistance and impact resistance are greatly improved.
Resistant to drops and impacts, suitable for components that withstand alternating impact forces.
4. Corrosion resistance and strong chemical stability
Resistant to acid, alkali, salt solution and molten media erosion, and does not react with most chemical materials.
5. High temperature resistance and antioxidant
It can be used stably at 800-1300℃ for a long time and will not pulverize or crack in high-temperature environments.
6. Good dimensional stability
The thermal expansion coefficient is low, the deformation is small under hot and cold cycles, and the tolerances of precision parts are stable.
7. Excellent insulation performance
Non-conductive and low dielectric loss, it can be used for high-temperature electronic insulation accessories.
8. Excellent sintering performance
The granulated powder has good fluidity, wide sintering temperature range, high density of finished product and few pores.
9. Outstanding cost performance
The price is much lower than that of full zirconia, and its performance is higher than that of pure alumina. The overall cost advantage is obvious.
10. Good processing performance
After sintering, it can be polished, drilled, cut, and mirror polished, and is suitable for all types of precision finishing.

Mainstream application fields of ZTA powder
1. Wear-resistant mechanical parts
Ceramic nozzles, wire drawing dies, valve cores, pump body linings, ceramic plungers, and textile yarn guides.
2. Tools and wear-resistant molds
Industrial ceramic cutting knives, wear-resistant stamping dies, wear-resistant bushings.
3. Medical device accessories
Wear-resistant ceramic heads for surgery, wear-resistant transmission parts for medical equipment, and small medical wear-resistant structural parts.
4. Electronic semiconductors
High temperature insulating base, precision positioning ceramic parts, wear-resistant conductive isolation sheet.
5. Chemical anti-corrosion equipment
Stirring shaft sheath, grinding ball, corrosion-resistant reaction chamber lining, conveying pipe lining.
6. New energy industry
Lithium battery coated wear-resistant rollers, diaphragm cutters, and high-temperature sealing ceramic parts.
7. Auto parts
Ceramic sealing rings for automobile water pumps, sensor wear-resistant protective sleeves, and valve wear-resistant sheets.
8. Optical precision parts
Optical positioning sleeves, wear-resistant clamps, optical fiber wear-resistant connectors.
9. Metallurgical heat treatment
High-temperature wear-resistant fixtures, thermocouple protection sleeves, and molten metal diversion linings.
10. Grinding media
Ultra-fine grinding zirconium-aluminum composite balls, suitable for grinding coatings, inks, and powders.