High toughness composite ZTA zirconia toughened ceramic plate

Zirconia Toughened Aluminum (ZTA) is a composite ceramic material with alumina (Al ₂ O3) as the matrix and partially stabilized zirconia (ZrO ₂) as the toughening phase. This material combines the high strength, high hardness, and high wear resistance of alumina with the high toughness and impact resistance of zirconia, making it a high-performance advanced ceramic material.

Product Features

1. High hardness and wear resistance
   -ZTA ceramics have higher hardness than ordinary alumina ceramics, excellent wear resistance, and are less prone to scratches and dents on the surface. Its Rockwell hardness can reach ≥ 90 HRA.
   -In the wet slurry wear resistance test, ZTA ceramics exhibit higher wear resistance than ordinary alumina.
2. High resilience
   -The fracture toughness of ZTA ceramics is significantly higher than that of ordinary alumina ceramics, reaching ≥ 5.5 MPa · m ¹/², and some high-performance products can even reach ≥ 7.5 MPa · m ¹/². This high toughness makes it less prone to rupture when subjected to impact, making it suitable for applications in high stress environments.
3. Good thermal shock resistance
   -ZTA ceramics have excellent thermal shock resistance and can maintain structural stability in environments with rapid temperature changes.
4. High thermal conductivity and low thermal expansion coefficient
   -The thermal conductivity of ZTA ceramics can reach 26 W/(m · K), which is comparable to alumina. At the same time, it has a lower coefficient of thermal expansion (7.2 × 10 ⁻⁶/K at 40-400 ℃) and exhibits good dimensional stability in high-temperature environments.
5. Excellent chemical stability
   -ZTA ceramics are resistant to acid and alkali corrosion, have good chemical stability, and can maintain stable acid and alkali resistance within the pH range of 3-12.
6. High flexural strength
   -The bending strength of ZTA ceramics can reach 300-800 MPa, which is about twice that of ordinary alumina.
7. High insulation
   -ZTA ceramics have high electrical insulation and low dielectric constant, making them suitable for the field of electronics and electrical engineering.

toughening mechanism

1. Stress induced phase transformation toughening
   -Zirconia undergoes a phase transition from tetragonal to monoclinic under specific conditions, resulting in volume expansion and preventing crack propagation.
2. Microcrack toughening
   -The addition of zirconia will form microcracks in the matrix, increase the fracture surface energy of the material, and hinder the rapid propagation of the main crack.
3. Dispersion toughening
   -Zirconia particles are dispersed in the alumina matrix, forming a tortuous crack propagation path and increasing fracture toughness.
4. Compression surface toughening
   -Through grinding treatment, the zirconia particles on the surface layer are transformed into monoclinic phase, and the volume expands to form a compressed surface layer, which offsets the external tensile stress and strengthens the ceramic.

Application area

1. Industrial wear-resistant field
   -ZTA ceramic lining plates are widely used as wear-resistant lining for heavy wear equipment such as mines, docks, ports, etc., such as conveyors, ball mills, grinding discs, etc.
2. Electronic and electrical field
   -As a semiconductor device packaging carrier, ZTA ceramic substrate has good heat dissipation, insulation, and thermal shock resistance, and is suitable for electric vehicle IGBT modules, LED packaging, etc.
3. Medical field
   -ZTA ceramics have excellent biocompatibility and are used in dental implants, orthodontic brackets, artificial joints, etc.
4. Cutting tool field
   -ZTA ceramic cutting tools combine the bending resistance of zirconia with the rigidity of alumina, making them suitable for high-speed cutting.
5. Other fields
   -ZTA ceramics can also be used to manufacture high-performance ceramic balls, ceramic lining tiles, etc., and are widely used in industries such as chemical engineering and metallurgy.

Product advantages

1. High cost-effectiveness
   -Compared to pure zirconia ceramics, ZTA ceramics have lower costs and higher cost-effectiveness while maintaining high performance.
2. Customized services
   -ZTA ceramic plates can be customized into products of different sizes, shapes, and properties according to customer needs.
3. Easy installation
   -ZTA ceramic liner can be compounded with rubber or steel plate through vulcanization process to increase the firmness of the liner and equipment.

High toughness composite ZTA zirconia toughened ceramic plate is an advanced ceramic material with excellent comprehensive performance, widely used in various fields such as industry, electronics, and medical care. Its high hardness, high toughness, good thermal shock resistance, and excellent chemical stability make it an indispensable high-performance material in modern industry and technology, capable of performing well in various harsh environments.