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Amid the trend of high-end manufacturing shifting toward precision and efficiency, Silicon Carbide balls, boasting exceptional material properties, have emerged as the performance benchmark in two core fields—bearings and grinding. Spanning industrial equipment to semiconductor manufacturing, they are reshaping the application landscape of the industry through technological breakthroughs and propelling industrial upgrading into a fast lane.

A Review and Outlook of Shanghai Rongchuang Kaixun's 2025 Development

A Special Day for Special You
 
— Warm Monthly Birthday Party Held byShanghai Creative Advanced Materials Co.,LTD.
 
At Rongchuang Kaixun, we deeply recognize that every employee is the company's most valuable "special material" — tough, reliable, and the cornerstone of building the company's future. To appreciate everyone's hard work and create a warm and harmonious "home" culture, the company holds elaborate collective birthday parties monthly for employees celebrating their birthdays, making blessings and laughter the most heartwarming highlights in work life.

Zirconia all-ceramic material is a crucial material for the development of modern high-tech industries. With the advent of the 5G era for mobile phones, zirconia all-ceramic has gained significant attention and become a hotspot in the industry due to its jade-like warm texture, scratch and wear resistance, minimal signal shielding, and excellent thermal dissipation properties. It is now applied in structural components such as phone cover plates and fingerprint modules.

In addition to being used to prepare thermal conductive materials, boron nitride is also an ideal material for radiative cooling.

1.1 Silicon Carbide Crystal Structure and Sintering Characteristics

Silicon Carbide (SiC) is a compound formed by silicon and carbon bonded covalently. Its crystal structure is primarily composed of silicon-carbon tetrahedra, exhibiting strong covalent bond characteristics (with an ionicity of only 0.2) and extremely low diffusion coefficients. At 2100°C, the self-diffusion coefficients for carbon and silicon are merely 1.5×10⁻¹⁰ cm²/s and 2.5×10⁻¹³ cm²/s, respectively. These structural characteristics make silicon carbide exceedingly difficult to sinter, requiring specialized sintering aids or particular process conditions to achieve densification.

The sintering process of SiC ceramics essentially involves high-temperature treatment to form strong bonds between powder particles, reduce porosity, increase density, and thereby enhance mechanical strength and properties. The typical presence of an oxide layer on the SiC surface further complicates sintering. To address the challenge of sintering SiC, researchers have developed various sintering techniques, including traditional methods such as reaction bonding, pressureless sintering, hot pressing, and hot isostatic pressing, as well as emerging technologies like Spark Plasma Sintering (SPS) and Oscillatory Pressure Sintering (OPS).

High-hardness silicon nitride ceramic tubing holds significant value in the field of anti-fatigue wear, particularly under high-cycle loading conditions, where its performance excels. This article first analyzes the physical and chemical properties of high-hardness silicon nitride ceramics, then compares the advantages and disadvantages of such products with other industrial ceramic materials, and finally introduces their production process and suitable industrial applications. The style of the article is pragmatic and rigorous, aiming to provide reference for engineering and technical personnel.

I. Tensile Strength

The tensile strength of ceramic materials refers to the maximum ability of a material to resist fracture under the action of axial tensile loading. Its definition is based on the ratio of the stress generated within the material to the external load and the cross-sectional area of the specimen. This performance parameter is one of the key indicators for characterizing the mechanical behavior of ceramic materials, reflecting the material's ability to resist microcrack propagation and eventual failure caused by tensile stress. Due to the typically brittle fracture characteristics of ceramics, their tensile strength is generally lower than their compressive strength and is significantly influenced by intrinsic material defects (such as pores, second-phase particles, interface defects, etc.). In engineering applications, the accurate determination of tensile strength is of great importance for assessing the reliability of ceramic components under complex service conditions such as dynamic loads, thermal shock, or mechanical vibration.

In the arena of industrial materials, silicon carbide (SiC) and boron carbide (B₄C) are redefining the meaning of "powerful machining capabilities" with their near-limit physical properties. Dubbed "industrial diamonds," these ultra-hard ceramics not only challenge the boundaries of application environments but also, through continuous innovation in processing technologies, turn the impossible into reality, establishing themselves as strategic materials in the field of advanced manufacturing.