1、 Zirconia structural ceramics
Because TZP ceramics have high toughness, bending strength and wear resistance, excellent heat insulation performance, and the thermal expansion coefficient is close to that of metal. Therefore, TZP ceramics are widely used in the field of structural ceramics.
Its applications include: grinding balls; miniature fan shafts; used for optical fiber inserts, optical fiber sleeves, drawing dies and cutting tools, wear-resistant knives, watch cases and watch straps, light batting clubs for golf, etc.; large glass tank kilns The key parts of the key parts; hollow balls made of various high-grade insulation bricks to replace fiber felt materials; nano-scale yttria-stabilized zirconia (YSZ) coatings are used for thermal insulation coatings of aerospace engines, submarines, and ship diesel engines Cylinder linings, etc.
2、 Zirconia Functional Ceramics
Functional ceramics of zirconia have sensitive electrical performance parameters. They are new materials that have been developed and applied in recent years. They are mainly used in various sensors, third-generation fuel cells and high-temperature heating elements. Moreover, the ZrO2 material has the characteristics of electrical conductivity and oxygen ion vacancy in the crystal structure at high temperature, and can be made into various functional components. At present, there are mainly the following applications:
Oxygen sensors are mainly used in industrial production, monitoring, and quality inspection; as solid electrolytes to develop third-generation fuel cells—solid oxide fuel cells; high-temperature heating elements; piezoelectric materials.
3、 Health textile materials
Infrared rays are a kind of radiation in the sun's rays, which belong to invisible light. Infrared rays can be divided into three types: near, middle and far infrared rays according to the wavelength. In medicine, it is pointed out that zirconia (ZrO2), aluminum oxide (Al2O3), titanium dioxide ( Ceramic powders made of minerals such as TiO2) and yttrium trioxide (Y2O3) absorb and excite the strongest far-infrared energy. The far-infrared rays with a wavelength of 4-14 microns are also called reproductive rays. When the human body needs to dissipate heat and cool down, the physiological phenomenon of sweating occurs. Infrared fibers can accelerate the drying of the moisture-absorbing layer and keep the human skin dry, so it can be used in rehabilitation medicine and preventive health care.
4、 Catalyst support
ZrO2 has good chemical stability, its surface is both acidic and alkaline, and has both oxidizing and reducing properties; it is also a P-type semiconductor, which is easy to generate oxygen holes, so it can be used as a catalyst carrier to generate a strong reaction with the active component. Interaction. Therefore, in recent years, ZrO2 has aroused widespread interest among scholars in the field of catalysis. ZrO2 has received special attention in automation, catalytic hydrogenation, catalysis of FT reactions, catalysis of polymerization and oxidation reactions, and superacid catalysts. In the research of methanol synthesis catalyst, the research on the preparation of ZrO2 carrier catalyst for methanol synthesis by supercritical drying method has achieved good results. It is estimated that ZrO2 will be widely used in the field of catalysts in a short time.
5、Refractories
As a refractory material, ZrO2 is mainly used in the key parts of large-scale glass tank furnaces. The refractory material used in the early stage has a ZrO2 content of about 33-35%, and after electric melting, it becomes electric melting ASZ. Japan's Asahi Glass Co., Ltd. made zirconium refractory materials containing ZrO294-95%. It is the first in the world to be electro-fused at 2450 ° C. It can be used on the top of the glass kiln and other key parts. Although the cost has risen sharply, the economic benefits are still obvious due to the increase in the life of the tank kiln.
ZrO2 is also widely used in other high-temperature refractory fields, but because of the cost, it is more used in high-value refractory products, such as molten steel nozzles, nozzles, valves, high-temperature fibers, etc.
