Alumina ceramics, also known as alumina ceramic materials or alumina ceramic products, are ceramics primarily composed of alumina. If you are wondering how to achieve precision processing of alumina ceramics, read on for insights. Methods for Precision Processing of Alumina Ceramics 1. Grinding: Utilize grinding tools such as grinding wheels and diamond wheels to perform the grinding process on alumina ceramics. This method is effective for surface finishing and shaping, ensuring the desired dimensions and shapes are attained. 2. Polishing: Employ mechanical or chemical techniques to polish the surface of alumina ceramics, enhancing its smoothness and optical properties. Polishing is commonly used when high surface quality and optical performance are required. 3. Laser Processing: Implement lasers for cutting, drilling, or engraving alumina ceramics. Laser processing offers non-contact advantages, high precision, and excellent flexibility, making it suitable for intricate shapes and delicate structures. 4. Electrical Discharge Machining (EDM): Utilize electrical discharge to create small discharge pits on the surface of alumina ceramics, enabling cutting and grooving. EDM boasts high precision and non-contact characteristics, making it suitable for processing high-hardness alumina ceramics. 5. High-Precision Cutting: Use equipment like drilling machines, wire cutting machines, or EDM wire cutting machines for cutting alumina ceramics. This method enables high-precision cutting and separation. Precautions for Precision Processing During the precision processing of alumina ceramics, it is crucial to consider its high hardness and susceptibility to cracking. Implement appropriate cooling and lubrication measures to prevent material rupture and damage. Additionally, choose suitable techniques and equipment based on specific processing requirements to ensure both quality and efficiency. In conclusion, achieving precision processing of alumina ceramics requires careful consideration of the chosen method, proper cooling and lubrication, and the right equipment. By adhering to these factors, the process will yield excellent results and meet your desired specifications. Whether you require intricate shapes or high-quality surface finishes, alumina ceramics can be precisely processed to fulfill your requirements.

         Zirconia ceramic processing demands attention to various critical aspects due to its characteristics of high hardness, strength, temperature stability, and exceptional corrosion resistance, making it a popular choice for manufacturing high-precision and high-performance components. In this article, we will explore the key considerations involved in zirconia ceramic processing. 1. Material Selection Choosing the right zirconia ceramic material is essential, taking into account the specific application requirements such as composition, crystalline phase, particle size, and other relevant properties. Different materials may present varying degrees of difficulty and methods during the processing phase. 2. Tool Selection Given zirconia ceramic's high hardness and brittleness, the selection of appropriate cutting tools is crucial. Tools with high hardness, such as diamond or cubic boron nitride (CBN) tools, are preferred. Additionally, the tool's geometric shape and edge angles must align with the specific processing requirements. 3. Processing Parameters Controlling processing parameters is paramount to achieving high-quality zirconia ceramic processing. Optimal choices for cutting speed, feed rate, cutting depth, and other parameters should be made to avoid excessive cutting speed or feed rate, which may lead to tool wear or ceramic material fracture. 4. Cutting Lubrication Cutting lubrication plays a vital role during zirconia ceramic processing. Proper use of suitable cutting fluids or coolants aids in cooling and lubrication, reducing processing temperatures, minimizing cutting forces, and effectively controlling tool wear and ceramic surface quality. 5. Surface Treatment Often, zirconia ceramic processing requires further surface treatment, such as polishing or grinding, to achieve the desired precision and surface quality. Choosing appropriate techniques and materials is crucial to avoid introducing damage or defects. 6. Preventing Thermal Stress Due to zirconia ceramic's high coefficient of thermal expansion, thermal stress leading to fractures can occur during processing. To mitigate this, it is vital to control processing temperatures and avoid rapid cooling or heating operations, thereby minimizing the impact of thermal stress. 7. Safety Precautions The generation of chips and dust during zirconia ceramic processing can pose health hazards to workers. Therefore, it is essential to implement appropriate safety measures, including the use of masks, protective goggles, gloves, and other safety equipment. In conclusion, zirconia ceramic processing requires careful attention to material selection, tool choice, processing parameter control, cutting lubrication, surface treatment, prevention of thermal stress, and safety precautions. By employing proper processing methods and control, one can ensure the quality and process stability, thereby guaranteeing the performance and reliability of zirconia ceramic components. Thank you for reading. We invite you to visit CSCERAMIC for more information if you would like to learn more about industrial ceramic material and the advanced range of ceramic products we offer.

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Commonly Used Industrial Alumina Ceramic Materials   Industrial alumina ceramic materials can be generally divided into 2 types as mentioned below. High Purity Alumina Ceramic Materials:   High purity alumina ceramic refers to the ceramic materials whose content of aluminum oxide exceeds 99%. Since the sintering temperature can reach up to 1650℃~1990℃ as well as its transmittance wavelength is between 1~6μm, it is usually to be produced molten glass to replace platinum crucibles. 99.7% Al2O3 Crucible   This high purity alumina ceramic material is used to manufacture sodium lamp tubes for its optical property and alkali metal corrosion resistance. Moreover, it is also applied into integrated circuit substrates and high frequency insulative materials. Ordinary Purity Alumina Ceramic Materials:   According to its content of aluminum oxide, the ordinary purity alumina ceramic material generally includes 99%, 95%, 90% and 85%, but 80% and 75% also can be classified into ordinary one. Among this type, 99% alumina ceramic material is commonly used to manufacture industrial ceramic crucibles, refractory ceramic tubes and special wear resistant ceramic parts such as ceramic bearings, ceramic seal components and water valves.    industrial ceramic crucibles                  refractory ceramic tubes            ceramic bearings                               ceramic seal components water valves 95% alumina ceramic materials is primarily used to manufacture corrosion and wear resistant industrial parts. 85% alumina ceramic materials are generally mixed with certain proportions of talcum in order to enhance its electrical properties and mechanical strength, so it can be used as components to seal with metals such as molybdenum, niobium and tantalum.

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Application of Alumina Ceramic in Electronic Industry Alumina ceramic is a ceramic material which mainly contains aluminum oxide. It is applied to thick-film integrated circuits for its excellent performance of thermal conductivity, mechanical strength and high-temperature resistance. Application of Alumina Ceramic in Multi-chip Package: Alumina ceramic multi-layered substrate is used for multi-chip packages. Its manufacture methods include thick film printing method, ceramic green body laminating method, ceramic green body printing method and thick-film hybrid method. Thermal conductivity coefficient of commonly used thermal conductive gaskets is below 2.0W/(m*K). For high thermal conductive Bergquist Sil-Pad 2000 series, the thermal conductivity is only 3.5W/(m*K), while thermal conductivity of alumina ceramic is as high as 29.3W/(m*K), also it is an ideal material to substitute silicone sheets, silicon dioxide films, flexible silicone pads, insulation particles and mica sheets. Application of Alumina Ceramic in High-Pressure Sodium Lamp (HPS lamp) Arc Tube: Translucent alumina ceramic is made of poly-crystalline opaque alumina ceramic material with high purity (VK-L100G, 99.999%). It is applied in HPS lamp and the luminous efficiency is twice as that of mercury lamp. High purity translucent alumina ceramic manifests good performance of high-temperature resistance, corrosion resistance, high insulation, high strength and low dielectric loss. As an excellent optical ceramic, it can also be used for the viewing window of microwave oven. Application of Alumina Ceramic in Nano sensors: The grain boundaries, pores and other structures of nanosized alumina ceramic particles with high purity (VK-L100G) are sensitive to environment with high temperature and corrosive gas, so it is used as sensitive parts of sensors, which can provide accurate and rapid detection and control information.

Machinable Hardness and Application of 99% Alumina Ceramics * Machinable Hardness of 99% Alumina Ceramics  99% alumina ceramics is the most common industrial ceramic materials, and widely applied in modern society for its excellent properties. In this article, the machinable hardness and application of #99 alumina ceramics are briefly introduced. AL2O3 mainly has 3 kinds of crystalline phases, which are α,β and γ crystalline phase. Among them, αcrystal phase Al2O3 has the most stable state. When temperature reaches up to 1300℃, β and γ crystals almost convert to αphase crystal. In Al2O3 crystalline phase, most atomic bonds (formed by aluminum ion and oxygen ion) are covalent bonds, ionic bonds or mixed bonds of both, which results in high interatomic binding energy and strong directivity, therefore Al2O3 material manifests high brittleness, low plastic deformation, and high hardness. Its hardness is comparable with cemented carbide, and several times higher than steel. Alumina Creamic Generally, density of high purity AL2O3 ceramics can reach up to 3980kg/m3, and strength of extension is 260MPa, the elastic modulus is between 350 to 400GPa, and compressive strength is 2930(MPa). For hardness, high purity AL2O3 could reach to 99HRA. Although hardness of 99% refined AL2O3 ceramics is relatively lower than that of high purity AL2O3 ceramics, it could still reach to 70HRA at room temperature according to test result. * Application of 99% Alumina Ceramics Alumina oxide is the most proven engineering ceramics, with excellent electrical insulation performance, high hardness and wear-resistance, it is widely applied in machinery manufacturing, aerospace, precision instruments, petrochemical and other fields.

    Zirconia structural ceramic possesses a series of excellent properties, including high toughness, high bending strength, high wear resistance, outstanding heat-insulation, and its coefficient of thermal expansion is closed to that of steel. In this article, applications of zirconia structural ceramics would be briefly introduced.     Zirconia structural ceramic is usually used as heatproof ceramic coating and high-temperature refractory for its favorable chemical stability, thermal stability and thermal shock resistance. Besides, zirconia structural ceramics could also be applied on other refractories in order to improve their fire resistance.   The refractory materials of zirconia structural ceramic are basically including zirconia sizing nozzles, zirconia ceramic crucibles, zirconia ceramic refractory fiber, zircon-corundum refractory brick, zirconia refractory hollow ball, etc., which are mainly used in the field of metallurgy industry and silicate industry.       Zirconia structural ceramic is extensively used as engineering ceramic for its excellent physical and mechanical properties, including ceramic bars, ceramic tubes and ceramic rolls. The service life and stability of zirconia structural ceramics are superior to traditional sliding bearings and rolling bearings.     Zirconia ceramic could be used as a kind of precision ceramic parts, such as engine cylinder liner and piston ring, which can improve thermal efficiency while reducing machine’s weight.     Zirconia structural ceramic valve is able to substitute traditional metal alloy valve, especially under extremely harsh working conditions, zirconia structural ceramics can improve service life greatly by reducing abrasion and enhancing corrosion resistance effectively.     Zirconia ceramic materials can be used to manufacture ceramic knives, which are sharper than traditional steel knives.

Among new ceramic materials, alumina ceramic and zirconia ceramic are quite outstanding and widely used for their various excellent performance. In this article, features of these two kinds materials are briefly introduced. *Features of alumina ceramic: Alumina ceramic is well-known for its low permittivity, low dielectric loss, high dielectric strength, high volume resistivity, wonderful Flexural Strength, terrific stability, preferable compressive strength and acceptable denaturation of cold and heat shock. Thermal insulation ceramic, 95 alumina ceramic and 99 alumina ceramic are widely used in thermostat of household appliances, insulation parts, thermal equipment, iron-structured construction and ship construction, etc. Alumina Ceramic Parameter Table PROPERTIES UNIT VALUE Density g/cm3 3.7 Hardness HRA ≥86 Bending Strength Mpa ≥300 Max. Working Temperature ℃ 1500 Thermal Expansion ×10-6/℃ 7.15-7.67 Permittivity εr(20℃,1MHz) 9.21 Dielectric Loss tanδ×10-4,1MHz 2.5 Volume Resistivity Ω·cm(100℃) 9.2*1016 Compressive Strength Mpa 2500 Elasticity Modulus Gpa 300 Poisson's ratio / 0.2 Thermal Conductivity W/m·K(20℃) 20 *Features of zirconia ceramic: Zirconia ceramic has a series of excellent properties, for instance, high hardness, preferable wear resistance, high toughness, low friction coefficient and terrific corrosion resistance. It is extensively used in the field of machine sealing, grinding medium, cutting tools, ceramic bearing, auto engine parts and dehydration equipment for paper manufacturing. The wear resistance of zirconia ceramic is as 15 times as that of alumina ceramic, but the friction coefficient of zirconia ceramic is merely as 0.5 times as that of alumina ceramic. Zirconia ceramics with fine texture have been polished, then a smoother surface could be obtained, whose surface roughness and friction coefficient are more desirable. Zirconia Ceramic Parameter Table PROPERTIES UNIT VALUE Density g/cm3 6.05 Water Absorption % 0 Thermal Expansion ×10-6/℃ 10.5 Young’s Modulus of Elasticity Gpa 210 Poisson's ratio / 0.3 Hardness(HV) MPa 1200 Bending Strength (indoor temperature) MPa 950 Bending Strength (700℃) MPa 210 Compressive Strength (indoor temperature) MPa 2000 Fracture Toughness Mpa.m1/2 10 Thermal Conductivity (indoor temperature) W/m.k 2 Specific Resistivity (indoor temperature) Ω.mm2/m ＞1015 Max. Working Temperature ℃ 1350 Acid and alkali corrosion resistance / Intense