Advanced Ceramic Materials

When it comes to the hardest materials on Earth, diamonds are often the first that come to mind, celebrated for their unmatched natural hardness and durability. However, in the world of materials science, another contender plays a crucial role in various industrial applications: cubic boron nitride (cBN) . This raises a compelling question: Is cubic boron nitride harder than diamond? Understanding Hardness and Material Science Hardness, in materials science, refers to a material's resistance to deformation, particularly permanent changes such as indentation or scratching. The hardness of a material is a crucial factor in its application, especially when it comes to cutting, grinding, and drilling technologies. Diamond: The Unsurpassed Natural Material Diamond, a crystalline form of carbon, has long been recognized as the hardest known natural material. Its extraordinary hardness makes it ideal for a wide range of applications, from jewelry to industrial cutting and drilling tools.

Introduction Thermal management  is a critical concern in various industries, from electronics and aerospace to automotive and energy. The increasing demand for high-performance devices and systems has accentuated the need for effective heat-dissipation materials. Hexagonal boron nitride (h-BN) has emerged as a promising candidate to address the challenge of thermal management. In this detailed review, we assess whether h-BN is the ideal choice for thermal management applications. Importance of Thermal Management Effective thermal management is essential to ensure the longevity and performance of electronic components and systems. Overheating can lead to device failure, reduced efficiency, and safety concerns. Customers seek materials that can efficiently conduct and dissipate heat in various applications. Hexagonal Boron Nitride (h-BN): An Overview Hexagonal boron nitride  is a synthetic, non-metallic material with exceptional thermal properties. It possesses a hexagonal crystal latti

Fuel cells are new energy technologies with broad application prospects. Carbon-supported platinum-based catalysts (Pt/C) are the most commonly used fuel cell electrode catalysts, but the poor stability and high cost of Pt/C severely limit their large-scale applications.  Covalent carbides, silicon carbide , and boron carbide , have excellent physicochemical stability due to their extremely strong covalent bonds, and have become important basic materials for the preparation of fuel cell catalysts with high stability and low cost. Hydrogen is widely used in many fields such as industry and medical treatment, and it is also one of the most commonly used fuels for fuel cell anodes. Platinum-based catalysts are still the best hydrogen production catalysts. Silicon carbide (SiC) is a compound with very stable physicochemical properties. Composite nanomaterials with SiC as an important component are also often used as supports for platinum-based catalysts. B4C is a highly stable covalent

Little radiation Medical zirconia is cleaned and processed, leaving a small amount of alpha ray residue in zirconium, which penetrates to a small depth of only 60 microns. High density, high strength, metal-free inner crown Zirconia has unique resistance to cracking and strong curing performance after cracking. It can be used to make more than 6 units of ceramic bridges. Although there is no metal support, it has high strength, and its refractive index is basically close to that of natural teeth, with dense edges and high precision, and has excellent aesthetic effects: Zirconia ceramics are usually yttrium-stabilized zirconia ceramics with high flexural strength. Compared with other all-ceramic restoration materials, the strength advantage of zirconium dioxide material allows doctors not to rub the patient's real teeth too much. Excellent aesthetic effect Zirconia all-ceramic teeth have a realistic and beautiful appearance, solid and wear-resistant, similar in color

Bearing Material Selection The choice of bearing material is essential for its reliable operation. For many years, materials such as rubber, bronze and ceramics have been used to make bearings. Different materials have different effects. Among them, ceramics and graphite are widely used in bearing manufacturing. Silicon Carbide Bearing There are many types of ceramic materials including oxides, borides, and nitrides. The typical ceramic material used for bearing manufacturing and achieving good performance is silicon carbide. Silicon carbide is sintered at high temperature in a resistance furnace using quartz sand, petroleum coke and other raw materials. It is a hexagonal crystal with a relative density of 3.20 to 3.25 g / cm3 and a micro hardness of 2 840 to 3320 kg / mm2. Silicon carbide has the advantages of high hardness, good wear resistance, corrosion resistance, oxidation resistance, and low temperature creep. It has been widely used as a wear part in many fields.