Zibo Huao New Materials Co., Ltd
Zibo Huao New Materials Co.,Ltd is professional manufacturer and supplier of alumina based products, including alumina ceramic series products, refractory raw materials. More than 10+ years export experiences, not only is supplier, but also is eye of clients to monitor product quality and progress of orders.
Why Choose Us
Professional Team
We have skilled workers,experienced technicians,professional sale team,very sensitive to market information, can provided value information to clients, work with client, get win-win.
Production Market
Main market: Europe, Turkey, Iran, India, Australia, England, Russia, Vietnam, South Africa, South America, Ukraine, etc.
Our Service
Our service runs throughout the whole production process from the pre-sales, product design, production and after-sales.
After -Sales
Professional and thoughtful after -sales team, let you worry about us after -sales Intimate service, strong after -sales team support.
Different sizes and shapes can be customized according to customer needs
Introduction of alumina ceramics
Alumina ceramics is an advanced ceramic material with alumina (Al2O3) as the main chemical composition, which is widely used in traditional fields and new material fields.
Alumina ceramics generally refer to alumina ceramics with alumina content more than 70%.
It is not only a traditional refractory material and wear-resistant material, but also a widely used electronic ceramic material.
Advantages of alumina ceramics
- High mechanical strength, the flexural strength of alumina ceramics can reach 250MPa, and the flexural strength of hot-pressed formed alumina ceramics can reach 500MPa, which can maintain its mechanical strength at a temperature of 900℃;
- High resistivity, good electrical insulation performance, room temperature resistivity 1015Ω·cm, insulation strength 15kV/mm;
- High hardness, the Mohs hardness of alumina ceramics is 9, the Rockwell hardness is HRA80-90, the hardness is second only to diamond, far exceeding the wear resistance performance of wear-resistant steel and stainless steel, it is equivalent to 266 times that of manganese steel and 171.5 times that of high-chromium cast iron. Under the same working conditions, it can prolong the service life of the equipment at least ten times;
- The density of alumina ceramics is 3.6g/cm3, which is only half of that of steel, which can greatly reduce the equipment load;
- High melting point, anti-corrosion, melting point 2050℃, can resist the erosion of molten metals such as Be, Sr, Ni, Al, V, Ta, Mn, Fe, Co. It also has high resistance to erosion of NaOH, glass and slag;
- Alumina ceramics have excellent chemical stability, and do not chemically react with many complex sulfides, such as phosphides, arsenides, chlorides, nitrides, bromides, iodides, oxides, sulfuric acid, hydrochloric acid, nitric acid, and hydrofluoric acid.
Application of alumina ceramics
Alumina wear-resistant ceramics have the characteristics of high hardness, wear resistance, high temperature resistance, corrosion resistance and low price. They are suitable for industrial applications. They have been widely used in chute liners, cement grinding systems, raw material grinding systems, ore crushing treatment system, hard material powder conveying fan impeller, wear-protection linings of coal-fired power plant pulverizing system and cement plant powder selection system, etc.
Alumina ceramics are made from a white granular material that is similar to table salt or a very fine, silky, dense white powder. The three types of alumina are hydrated, calcined, and tabular. Each type comes in a variety of grades.
The types of alumina vary according to the amount of soda(Na2O), iron (Fe2O3) and silica (SiO2) they contain as well as their chemical purity and the properties of the powder used in the production process.
Calcined
To produce calcined alumina, aluminum oxide is heated to 1050°C or 1900°F. The super heating removes all chemicals and water creating a very pure, 99.99% pure, with a 9 on the Mohs hardness scale, which is just below a diamond's Mohs rating of 10.
Hydrated
Alumina hydrate, or alumina hydroxide, is used as a glaze because of its ability to stay in suspension in glaze slurries and adhesive qualities.
Tabular
Tabular alumina is produced by heating aluminum oxide to 1650°C or 3000°F. It has a high heat capacity, excellent thermal temperature, strength, and volume stability. It is formed fromsintering balls of calcined alumina, which are crushed to form a powder. Tabular alumina has high refractory properties, mechanical strength, wear resistance, chemical purity, dielectric properties, and corrosion resistance in acids and alkaline.
How Is Alumina Ceramic Made?
How is alumina ceramic madeAlumina is, arguably, the most widely-used advanced ceramic material, and it is made from the naturally-occurring ore called bauxite by implementing the process of Bayer extraction. The chemical compound of bauxite contains both oxygen and aluminium molecules.
Once aluminium oxide is extracted from bauxite, it looks similar to a regular white powder. For example, other forms of alumina that occur freely in nature are precious gems of ruby and sapphire.
Alumina advanced ceramic can be produced implementing several different manufacturing processes. These processes include extrusion, isostatic pressing, and injection molding. The finishing of alumina ceramics can be done using laser machining, precision grinding, or other processes.
However, alumina injection molding remains the most suitable alumina manufacturing process due to various possibilities for component design. This allows alumina ceramic manufacturers to cater to the varying needs of clients from different industries.
The alumina injection molding process consists of four vital steps that ensure maximum end-product quality, durability, and suitability for client's purposes:
Tool designing and manufacturing: First, experts design and manufacture molding tools necessary for producing the part required by the customer.
Injection molding: Engineers design custom injection molding cycles necessary for producing the adequate component.
Sintering/de-binding: This part of the process involves the removal of the feedstock binder material present in the molded part. Then, the part without binder undergoes the sintering process to become fully dense.
Post-sintering: Finally, different post-sintering procedures, such as drilling, honing, or grinding, ensure the product perfectly matches client's specifications and requirements.
Can you machine alumina ceramicYes, you definitely can machine alumina ceramics. The easiest time to machine alumina ceramic is before the process of sintering, during what is called a “green state” . Machining during this stage of the process allows easy machining into different complex geometries, but machining at this stage is not always possible, depending upon the part shape, size and intricacy, and because of the further shrinking of the part during the sintering process.
That is why professional alumina ceramic manufacturing companies usually machine alumina after sintering using high-quality diamond-coated tools. These tools help abrate the material away until the desired form of alumina ceramics is created.
This type of machining process will guarantee that alumina ceramic will retain precise dimensions after machining. However, alumina is hard and tough, and this process tends to be expensive and time-consuming.
That is why it is important to partner with a company that injection molds alumina to near net size in large quantities. This will help reduce overhead costs, helping you receive a lower price for alumina advanced ceramic components and products of an equally high quality.
Alumina, also known as aluminum oxide, is a highly versatile and widely used material in the field of ceramics. It is a white or off-white crystalline powder with a high melting point and excellent thermal and mechanical properties. In this article, we will discuss the various uses of alumina in the field of ceramics.
Refractory Material
One of the most significant applications of alumina in the ceramics industry is as a refractory material. Due to its high melting point, alumina is used as a lining material in high-temperature furnaces and kilns. Alumina also provides excellent thermal shock resistance, making it an ideal material for use in refractory applications.
Ceramic Substrates
Alumina is widely used as a substrate material in the production of electronic components, such as microchips and circuit boards. Alumina substrates are highly resistant to thermal and mechanical stresses, making them ideal for use in harsh environments. Additionally, alumina substrates provide excellent electrical insulation and high thermal conductivity.
Grinding Media
Alumina is also used as a grinding media in the ceramics industry. The hardness and wear resistance of alumina make it an ideal material for use in grinding applications. Alumina grinding media are used in ball mills, vibratory mills, and other types of grinding equipment.
Biomedical Applications
Alumina ceramics are widely used in the biomedical industry due to their excellent biocompatibility and resistance to wear and corrosion. Alumina ceramics are used to manufacture dental implants, joint replacements, and other medical devices.
High-wear Applications
Alumina is highly resistant to wear and abrasion, making it an ideal material for use in high-wear applications. Alumina ceramic components are used in a variety of industrial applications, including wear plates, cutting tools, and pump components.
Insulating Material
Alumina is an excellent insulating material, making it ideal for use in high-temperature and high-voltage applications. Alumina ceramics are used in the production of heating elements, electrical insulators, and other electrical components.
Conclusion
Alumina is a highly versatile material with numerous applications in the field of ceramics. Its high melting point, excellent thermal and mechanical properties, and wear resistance make it an ideal material for use in refractory, grinding, and wear-resistant applications. Additionally, alumina's biocompatibility and insulating properties make it an ideal material for use in biomedical and electrical applications.
Alumina ceramics are divided into two types: High purity type and ordinary type.
High purity alumina ceramics are ceramic materials with an Al2O3 content of more than 99.9%. Because their sintering temperature is as high as 1650℃ ~ 1990℃ and transmission wavelength is 1 ~ 6 μ m, molten glass is generally made to replace platinum crucibles; its light transmittance and alkali resistance can be used as sodium lamps; it can be used as integrated circuit substrates and high-frequency insulating materials in the electronic industry.
Zirconia ceramics (ZrO2 ceramics) have excellent properties such as high melting point and boiling point, high hardness, insulator at room temperature, and electrical conductivity at high temperature.
Pure ZrO2 is white, yellow, or gray when containing impurities, generally containing HfO2, is not easy to separate. The proven zirconium resources in the world are about 19 million tons. Zirconia is usually made from zirconium ore purification.
Zirconia ceramics are widely used in the field of structural ceramics because of their high toughness, high bending strength and high wear resistance, excellent thermal insulation, and thermal expansion coefficient close to steel.
The zirconia ceramic structure has a higher surface finish, mirror shape, extremely smooth, its friction coefficient is lower than that of alumina ceramics.
In addition, the toughness of the zirconia ceramic structure is excellent, which overcomes the inherent brittleness of the ceramic itself, the wear resistance is higher, the working life of the product is greatly extended.
Zirconia ceramic structural parts is a newly developed structural ceramic second only to alumina ceramics. Zirconia ceramic structure has been paid more and more attention because of its good properties, such as its fracture toughness is higher than that of alumina ceramics.
Alumina Balls: Uses and Application
Activated alumina balls are used to remove moisture and impurities in the air. Their primary building component is alumina, which is used by several industries to safeguard products against water and moisture.
Activated alumina manufacturers produce alumina balls to provide packaging solutions to their customers across several industries.
Let's look at some functional features of alumina balls. Uses and Applications Of Alumina Balls
Catalytic Properties
Alumina balls provide adsorption and a large surface area for activity during a reaction, making them a perfect catalyst. They act as a buffer to manage gaseous and liquid levels to preserve the natural composition of products and substances.
High-Temperature Resistance
Aluminum hydroxide is ground and then processed into small balls and put in a high-temperature kiln to stabilize their shape. Consequently, alumina balls perform well under extreme temperatures, unlike silica gel as a desiccant when shipping under harsh weather conditions is involved.
Adsorbing Features
Alumina balls adsorb impurities to provide a favorable environment when transporting goods, especially in the agricultural, pharmaceutical, water purification, and hydrogen peroxide plant industries. Its affinity to bond with water makes it favorable to introduce in a moisture-filled environment to protect items from getting soaked.
Benefits Of Alumina Balls
Alumina balls are weight and temperature resistant making them ideal for heavy-duty use.
They grade low on the abrasion scale but have high thermal conductivity, which makes them an important resource when retaining quality is a priority.
Their affinity to water makes them ideal in high-water or humid conditions.
Alumina balls are a manufacturer's choice because of their highly functional and resistive properties. They act as great desiccants for many businesses to preserve the quality of their goods during transport.
There are many manufacturers producing alumina balls in the market, and the quality is also uneven. So how to distinguish the quality of alumina balls?
Tool free identification of alumina ball quality
1. Through the eyes, the higher the alumina content, the whiter the ball, and vice versa.
2. Look for any indentation. If there are indentations, they are pressed into shape with high strength; If there are no indentations, it means poor rolling strength.
3. Touch with your hand. The surface is smooth, not rough, and of good quality. The heavier the quality, the higher the alumina content.
The above is a simple identification method, and a slightly more rigorous identification method is
Specific gravity: Taking an alumina ball with a content of 92% as an example, its specific gravity (density) should be above 3.60, and the alumina content should be above 92%. Under the same raw materials, formula, and firing temperature, the smaller the fineness, the higher the specific gravity, and the better the wear resistance.
Wear resistance: The more important quality of ball stones is wear resistance. Some testing institutions can also conduct wear tests. These test reports can display the quality of the pebbles, but the data is for reference only, as the environmental conditions for laboratory testing are very different from those for production. The experiment is done by water grinding, while many manufacturers use dry grinding; Secondly, in many cases, no other raw materials are added, only the friction between the pellets is added, and various raw materials are added during the actual production process.
In practical use, more records are needed to detect the wear of the ball stones. After the initial mixing ratio, the cost of alumina balls is compared with other grinding balls by recording the number of balls added and calculating the wear of ball stones in production based on production output, and the quality of ball stones from different manufacturers is compared. In addition to the hardness and fineness of the feed, there are also factors such as the grinding method (dry and wet grinding are different), the speed of the ball mill, whether the feed ratio is reasonable, and the viscosity of the feed.
Our Factory
Alumina ceramic series products use for materials transfer equipment in mining, iron & steel work, thermal & powder plants, mine, etc. Refractory materials application is refractory products and abrasives, it is used in high temperature engineering equipment, metallurgical and chemical fields, ceramics and construction materials.
FAQ
Q: What is alumina ceramic made of?
Q: Is alumina ceramic safe?
Q: What can I use instead of alumina ceramic?
Q: Is alumina safe to use?
Q: Is alumina ceramic brittle?
Q: What is the difference between ceramic and alumina?
Q: Is alumina the same as ceramic?
Q: How do you clean alumina ceramic?
Q: Can you drill alumina ceramic?
Q: Is alumina ceramic harder than steel?
Q: Is zirconia ceramic better than alumina ceramic?
Q: What's the difference between aluminum and alumina?
Q: Is alumina a natural material?
Q: Is alumina ceramic corrosion resistant?
Q: How hard is alumina ceramic?
Q: What can I use instead of alumina ceramic?
Q: What are the applications of alumina ceramics?
Q: How is alumina used in ceramics?
Q: What are the medical applications of alumina ceramics?
Q: What is the most common use of alumina?
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irconia Ceramic Beads, Alumina Ceramic Packing Ball, Alumina Lining Tile