Differences in the performance of alumina ceramics and alumina ceramics

1. First is alumina ceramic, because alumina ceramic has good mechanical strength, conductivity, and high-temperature resistance. However, when washing alumina ceramic, it is necessary to choose ultrasonic cleaning. Alumina ceramic is actually a widely used ceramic, mainly because its performance is very superior, and its application in the current market is becoming more and more widespread. It can effectively meet daily use and also satisfy some special needs. 2. Secondly, there is silicon nitride ceramic. In fact, silicon nitride has very high strength, especially silicon nitride after heat treatment, which can be said to be one of the hardest materials in the world. Moreover, silicon nitride ceramic is very heat-resistant, maintaining its strength at high temperatures of up to 1200 degrees Celsius, with basically no signs of decline. Even after being heated, it will not directly melt into a liquid; it requires about 1900 degrees Celsius to decompose. The corrosion resistance of silicon nitride ceramic is also remarkable, as it can resist all organic acids and alkaline solutions below 30%, and it can withstand the corrosion of many organic acids. Therefore, silicon nitride ceramic is considered a high-performance electrical insulating material.

Why is zirconia ceramic so favored?

Due to the many significant characteristics of zirconia ceramics, products made from zirconia ceramics have been favored by many in recent years. Products made from zirconia ceramics can be used with complete confidence due to their excellent stability. Jiangsu Tangzi New Materials Technology Co., Ltd. is a manufacturer specializing in the production of high-precision industrial ceramics and medical device ceramics, precision processing, and injection molding. We can customize the production of various precision ceramics according to customer requirements. The types of ceramics we produce include: alumina, zirconia toughened alumina, zirconia, aluminum nitride, silicon carbide, and silicon nitride ceramics. Our main products include: ceramic tubes, ceramic rings, ceramic plungers, ceramic substrates, ceramic positioning pins, ceramic bushings, semiconductor grinding discs, large alumina ceramic parts, zirconia teeth, large ceramic pumps, ceramic crucibles, ceramic structural parts, and special-shaped parts, etc. With their excellent wear resistance, corrosion resistance, high-temperature resistance, and insulation properties, they are widely used in high-end fields such as the photovoltaic industry, food and medical, instruments and meters, mechanical hardware, laser semiconductors, petrochemicals, metallurgy, electronics, automotive military industry, aerospace, and more.

What are the performance characteristics of zirconia ceramic rods?

Special industrial ceramics and zirconia ceramics are applied in various fields of life, and users have provided very positive feedback on their quality and performance. In addition to some differently shaped zirconia ceramic components, zirconia ceramic rods are also a very common product form. A comprehensive understanding of all aspects is necessary to facilitate better application. The organic chemical reliability of zirconia ceramic rods must also be excellent; otherwise, they will not be able to adapt to some unique working conditions, such as high temperature and high corrosion standards. As zirconia ceramic rods, their flame retardancy must also meet standards to comply with application requirements. In fact, as a non-metallic material, its fire resistance is very high. Currently, the application of zirconia ceramics in the market has far exceeded our expectations, and the use of alumina electronic ceramics is becoming increasingly common, as they can not only meet our daily living needs but also satisfy some special property requirements. Regarding the materials of zirconia ceramic rods, we all know that zirconia ceramic rods are made primarily from zirconium elements, with ceramics as auxiliary materials. In the overall manufacturing process, the metal zirconium element mainly bears the overall toughness, while this type of ceramic component can significantly enhance zirconia ceramic aluminum nitride ceramics. However, overall, its main role is still to enhance aesthetics.

What are the toughening methods for silicon nitride ceramics?

When using silicon nitride ceramics, there are quite a few knowledge points we need to understand in advance. First, you should know that its particle toughening involves adding certain particles with high elastic modulus to the Si3N4 material, such as SiC, TiC, TiN, etc. These are actually more specialized knowledge points, but since you are going to use it, it is necessary to grasp them. The particle toughening of silicon nitride ceramics is independent of temperature and can serve as a toughening mechanism at high temperatures. However, this method can only achieve a toughening effect of 40%-70%, which is not very significant. Today, what I have said here should be understood in the future. In addition, there is another type of toughening called phase transformation toughening. This refers to zirconia particles being dispersed in the Si3N4 matrix, and it is induced by stress-induced phase transformation from tetragonal to monoclinic phase, resulting in about 5% volume change. In this case, it can counteract external stress and also prevent crack propagation, achieving the purpose of toughening. Here is a reputable silicon nitride ceramic manufacturer; friends who want to order this product might as well come here to choose. Additionally, it is important to know that silicon nitride ceramic fibers refer to the composite toughening of Si3N4 ceramics with long fibers such as C and SiC. At this time, its mechanism mainly involves crack deflection or branching, pull-out effect, and bridging effect. The self-toughening here mainly refers to adjusting the material composition and controlling the preparation process conditions. This aspect of knowledge is also quite important. In this way, various mechanisms similar to fiber toughening can be obtained to achieve the effect. If you have any questions that you do not understand, you can call our Tel for consultation at any time. There are online customer service personnel here to assist you, and they will patiently answer any questions you may have. You can also see our contact information on the official website, and you can call directly for consultation.

What is the toughening of alumina ceramics, and what methods are there?

Ceramic alumina and toughening, as the name suggests, refers to the adjustment and increase of toughness in industrial ceramics. The toughening of alumina ceramics has broad application prospects in cutting-edge technology fields such as aerospace and aviation, as well as in industrial fields like machinery, metallurgy, and chemical engineering. However, its most fatal mechanical weakness is its inherent brittleness, which is determined by the structural characteristics of this type of material.

How can we solve these processing difficulties of zirconia ceramic rings?

Zirconia ceramic rings are a new type of high-tech ceramic. In addition to having the high strength, hardness, high temperature resistance, acid and alkali corrosion resistance, and high chemical stability that precision ceramics should possess, they also have a toughness that is higher than that of general ceramics.

What are the diversified uses and varieties of alumina ceramics?

Because alumina ceramics have many different properties, it can be made into many different products. For example, because of its high mechanical strength, it can be used as mechanical structure parts. With the advantages of high resistivity and good electrical insulation performance, alumina ceramics can be used as the ideal production material for substrate, socket, circuit shell and other products. In addition, due to its high hardness, alumina ceramics can be used to make cutting tools, grinding wheels, abrasives, wire drawing dies, extrusion dies, bearings, etc.; it also has the characteristics of high melting point and good corrosion resistance, which are necessary for making furnace tubes, crucibles, fibers, thermocouple protection tubes, etc.; in addition, alumina ceramics can also be used to make crucibles, human joints, artificial bones of pure metal and single crystal growth Sodium vapor lamp, microwave fairing, infrared window, laser oscillation components, solar cell materials and battery materials, etc. Alumina ceramics are also divided into different types, of which 99.7% alumina ceramics are made of high-purity alumina materials, with a series of strict process guarantee, the performance is more superior. Compared with 99% alumina and 95% alumina, it has higher density and higher bending strength. Compared with 95% alumina, 99% alumina ceramic has the advantages of density and microstructure, which is reflected in the appropriate performance price ratio, suitable for parts with high performance requirements and moderate price. 95% alumina ceramics adopt pure alumina materials and various preparation processes, which can ensure the intrinsic characteristics of alumina ceramics and continuously reduce the manufacturing cost. As a result, compared with the other two kinds of high-purity materials, 95% alumina ceramic has lower performance index and lower density, but it still has all the excellent properties of alumina ceramic, which is suitable for the characteristic advantages of alumina ceramic and general parts.

Which industries are zirconia ceramics used in?

In the aspect of structural ceramics, zirconia ceramics are widely used in the field of structural ceramics because of its high toughness, high bending strength, high wear resistance, excellent thermal insulation performance and thermal expansion coefficient close to that of steel. It mainly includes: Y-TZP grinding ball, dispersing and grinding medium, nozzle, ball socket, zirconia mold, micro fan axis, optical fiber pin, optical fiber sleeve, drawing die and cutting tool, cutting tool, clothing button, watch case and strap, bracelet and pendant, ball bearing, light golf bat and other room temperature wear-resistant parts. In the aspect of functional ceramics, its excellent high temperature resistance is used as induction heating tube, refractory and heating element. Zirconia ceramics have sensitive electrical properties and are mainly used in oxygen sensors, solid oxide fuel cells (SOFC) and high temperature heaters. ZrO2 has a high refractive index (n-21 ^ 22). The coloring elements (V2O5, MoO3, Fe2O3, etc.) added in zirconia powder can be made into colorful translucent polycrystalline ZrO2 materials, which can be made into various decorations with brilliant light like gemstones. In addition, zirconia is widely used in thermal barrier coatings, catalyst carriers, refractories, textiles and other fields. Zirconia is a professional material, toughening method, mainly using the phase transformation of zirconia to achieve! Pure zirconia is a white solid, containing impurities will appear gray or light yellow, adding chromogenic agent can also show a variety of other colors. The molecular weight of pure zirconia is 123.22, the theoretical density is 5.89g/cm3, and the melting point is 2715 ℃. It usually contains a small amount of hafnium oxide, which is difficult to separate, but has no obvious effect on the properties of zirconia. Zirconia has three crystal forms: monoclinic, tetragonal and cubic. Zirconia only appears as monoclinic phase at room temperature, and transforms into tetragonal phase when heated to 1100 ℃, and cubic phase when heated to higher temperature. Due to the large volume change during the transformation from monoclinic phase to tetragonal phase, and the large volume change in the opposite direction during cooling, it is easy to cause product cracking, which limits the application of pure zirconia in high temperature field. However, after adding stabilizer, tetragonal phase can be stable at room temperature, so volume mutation will not occur after heating, which greatly expands the application range of zirconia. Yttrium oxide is mainly used as stabilizer in the market.

What is the common firing technology of alumina ceramics?

What is the common firing technology of alumina ceramics? The technology of densification of granular ceramic body and formation of solid material is called sintering. Sintering is a method to remove the voids between the particles in the green body, remove a small amount of gas and impurity organic matter, and make the particles grow and combine with each other to form a new material. Electric furnace is widely used as heating device for sintering. In addition to pressureless sintering, there are hot pressing sintering and hot isostatic pressing sintering. Although continuous hot pressing sintering can increase the output, the cost of equipment and mould is too high. In addition, the length of products is limited due to the axial heating. Hot isostatic pressing sintering uses high temperature and high pressure gas as pressure transfer medium, which has the advantage of uniform heating in all directions, and is very suitable for the sintering of complex shaped products. Because of the uniform structure, the properties of the material are 30-50% higher than that of cold pressed sintering. It is 10-15% higher than common hot pressing sintering. Therefore, some high value-added alumina ceramic products or special parts needed by national defense and military industry, such as ceramic bearings, mirrors, nuclear fuel, gun barrel and other products, are fired by hot isostatic pressing. In addition, microwave sintering, arc plasma sintering and self propagating sintering are also being developed. Finishing and packaging process Some alumina ceramic materials need finishing after sintering. For example, products that can be used as artificial bone require high surface finish, such as mirror, to increase lubricity. Due to the high hardness of alumina ceramic materials, it is necessary to finish them with harder abrasive polishing materials. Such as SiC, B4C or diamond. Generally, the coarse to fine abrasive is grinded step by step and the final surface is polished. Generally, the grinding and polishing can be carried out by using alumina powder or diamond paste with a diameter of less than 1 μ M. In addition, laser processing and ultrasonic processing, grinding and polishing methods can also be used. Strengthening process of alumina ceramics In order to enhance the mechanical strength of alumina ceramics, a new strengthening process of alumina ceramics is introduced abroad. The process is novel and simple. The technology adopted is to coat a layer of silicon compound film on the surface of alumina ceramics by means of electron ray vacuum coating, sputtering vacuum coating or chemical vapor evaporation. The alumina ceramics are tempered by heating at 1200 ℃ ~ 1580 ℃. The mechanical strength of the strengthened alumina ceramics can be greatly increased on the original basis, and the alumina ceramics with strength can be obtained.

What are the main components of alumina ceramics?

Main components of alumina ceramics Alumina ceramic is a kind of ceramic material based on alumina, which is used in thick film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. It should be noted that ultrasonic washing is required. Alumina ceramic is a kind of widely used ceramics, because of its superior performance, it has been more and more widely used in modern society to meet the needs of daily performance. Alumina ceramics can be divided into high-purity type and ordinary type. High purity alumina ceramic is a kind of ceramic material with more than 99.9% alumina content. Because of its sintering temperature as high as 1650-1990 ℃ and transmission wavelength of 1-6 μ m, it is generally made into molten glass to replace platinum crucible. It can be used as sodium lamp tube by its light transmittance and alkali metal corrosion resistance. It can be used as integrated circuit substrate and high frequency insulating material in electronic industry. Ordinary alumina ceramics can be divided into 99 porcelain, 95 porcelain, 90 porcelain and 85 porcelain according to the content of alumina. Sometimes those with 80% or 75% of alumina can also be classified as ordinary alumina ceramics. Among them, 99 alumina ceramic materials are used to make high temperature crucible and refractory furnace tube materials, such as ceramic bearings, ceramic seals and water valve pieces; 95 alumina ceramic materials are mainly used as corrosion-resistant parts; 85 ceramics are often mixed with some talc to improve electrical performance and mechanical strength, and can be sealed with molybdenum, niobium, tantalum and other metals, and some can be used as electric vacuum devices. The forming methods of alumina ceramic products include dry pressing, grouting, extrusion, cold isostatic pressing, injection, tape casting, hot pressing and hot isostatic pressing. In recent years, domestic and foreign molding technology has been developed, including pressure filtration molding, direct solidification casting, gelcasting, centrifugal casting and solid free molding. Different product shape, size, complex modeling and precision products need different molding methods.