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What is zirconia toughened alumina?

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Author : trunnano
Update time : 2022-08-11 15:33:33
What is zirconia toughened alumina?
Zirconia toughened alumina (ZTA) is made of zirconia and alumina. Zirconia is an oxide of zircon and is usually added to other materials because of its durability. In general, the proportion of zirconia in zirconia toughened alumina is about 1/10 or 1/5. However, the ratio can be adjusted to meet the requirements of the product. ZTA ceramics are the perfect balance between cost and value. ZTA products are better than ordinary alumina products. They are also cheaper than pure zirconia products.
 

Difference between ZTA and ATZ
Although zirconia toughened alumina (ZTA) and alumina toughened zirconia (ATZ) have the same raw materials, it is important not to confuse the two composites. In the alumina toughened zirconia (ATZ), the ratio of alumina to zirconia is low. In zirconia toughened alumina (ZTA), the opposite is true.
 

ZTA Properties
The most remarkable characteristic of zirconia toughened alumina is its high mechanical strength. The high mechanical strength of zirconia toughened alumina is achieved by a process called stress-induced phase transformation toughening. At room temperature, the density of zirconia toughened alumina is about 4.3 g/cm3.
It has high heat resistance, which makes it suitable for high speed grinding equipment. The highest working temperature of zirconia toughened alumina is 1923 K and its thermal expansion coefficient is 8.1 × 10 ~ (- 6) C ~ (- 1). In addition, the Poisson's ratio, bending strength and elasticity of zirconia toughened alumina are 0.26,130 ksi and 47 × 10 6 psi respectively.
 

What are the advantages of Zirconia toughened Alumina?
The advantage of zirconia toughening alumina lies in its application in various industries. First of all, zirconia toughened alumina can withstand temperatures up to 1773 K. This makes it an ideal choice for manufacturing equipment that withstands high temperatures. In addition, zirconia toughened alumina has higher corrosion resistance than standard alumina. This makes it very durable.
 
In addition, compared with ordinary alumina, zirconia toughened alumina has smooth surface finish. This means that it can be used for equipment parts that are vulnerable to friction to prevent wear. In addition, zirconia toughened alumina is a cost-effective composite because it is cheaper than pure zirconia but more effective than ordinary alumina. These materials are also biocompatible. This means that they have few side effects on the human body.
 

ZTA uses
Valve seal
When selecting valve seals, it is important to ensure that the materials used are durable. Temperature resistance, corrosion resistance and wear resistance of materials are also important. Zirconia toughened alumina meets these standards and is commonly used as valve seals.
 
Joint replacement
One of the characteristics of zirconia toughened alumina is its biocompatibility. In addition, the composites are known to be tough and have high bending strength. This makes zirconia toughened alumina a qualified material for joint replacement. Its biocompatibility will ensure that it will not cause harm to the body, and its toughness will ensure that it can carry the weight of the body. It is usually used in hip arthroplasty.
 
Cutting tool
Zirconia toughened alumina is hard, wear-resistant, heat-stable and friction-resistant. These properties make it an excellent material for making cutting tools. In addition, they are cheaper than other materials used to make cutting tools, such as diamonds.
 
Grinding wheel
Grinding wheel is an important part of grinder. Grinding wheels are usually made of composite materials. Zirconia toughened alumina is one of the composites used to manufacture them. It is usually tough and abrasive enough for this purpose. It is also durable and self-sharpening.
 
Implant tooth
Zirconia toughened alumina is commonly used in the manufacture of dental implants because of its biocompatibility. In addition, zirconia toughened alumina is not easy to corrosion. This allows dental implants made from zirconia toughened alumina to be moist in the mouth without damage.
 
Bushing
The function of the bushing is to act as a filler between the two structures. It is a kind of bearing. Zirconia toughened alumina usually has a finish. This is one of the reasons why it is excellent as a bushing. Another reason it is used as a bushing is that it has high friction resistance.
 
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