Explore our top-tier precision ceramic products engineered for severe operational environments, thermal management, and ultra-wear applications.
Founded in 2003, Yixing Qiangguang Ceramic Materials Co., Ltd. is a professional provider dedicated to the research and development (R&D), manufacturing, and application solutions of high-performance advanced ceramic materials. It is among the few enterprises in China that possess a complete industrial chain, covering key links from powder forming, sintering and precision machining to the provision of integrated application solutions.
The company is also a rare domestic manufacturer engaged in the R&D, production, and supply of a comprehensive portfolio of ceramic materials. Its product range covers zirconia, yttria, alumina, magnesia, aluminum nitride, boron nitride, silicon nitride, silicon carbide, aluminum titanate and other key ceramic materials for industrial use.
Benefiting from excellent product performance and stable quality, its products are extensively utilized in various high-end fields, such as food and medical industries, new energy vehicles, laser semiconductors, petrochemical engineering, powder metallurgy, national defense and military, as well as aerospace sectors.
Adhering to the core principle of "creating value for customers", Qiangguang provides customized and cost-efficient advanced ceramic solutions tailored to the specific demands of different customers, supported by high-quality after-sales services and strict full-process tracking.
At present, the company's products are sold well across China and exported to Italy, the United Kingdom, Australia, Japan, Malaysia, Thailand, Hungary and other countries and regions.
An authoritative engineering breakdown of covalent bond mechanics, grain structure engineering, and thermomechanical performance parameters.
Silicon Nitride exists in two main crystallographic structures: $\alpha\text{-Si}_3\text{N}_4$ (trigonal) and $\beta\text{-Si}_3\text{N}_4$ (hexagonal). During liquid-phase sintering at temperatures above $1750^\circ\text{C}$, the equiaxed $\alpha$-phase dissolves into the liquid oxide phase and reprecipitates as elongated needle-like $\beta$-grains. This self-reinforcing microstructure yields high fracture toughness via crack deflection and grain bridging mechanisms.
Due to its low coefficient of thermal expansion ($\approx 3.0 \times 10^{-6}/\text{K}$) and high flexural strength ($>850\text{--}1000\text{ MPa}$), Silicon Nitride demonstrates an unmatched thermal shock parameter ($\Delta T > 800^\circ\text{C}$). It withstands rapid temperature quenching from extreme industrial heat down to ambient water immersion without catastrophic thermal micro-cracking.
$\text{Si}_3\text{N}_4$ is chemically inert to most molten non-ferrous metals (such as aluminum and zinc) and resists attack by concentrated hydrofluoric acid, sulfuric acid, and alkaline solutions. Its extraordinarily low coefficient of friction under dry or lubricated conditions makes it ideal for precision high-speed ceramic bearing balls and dynamic mechanical seals.
| Material Property | Silicon Nitride ($\text{Si}_3\text{N}_4$) | Zirconia ($\text{ZrO}_2$ Y-TZP) | Alumina ($\text{Al}_2\text{O}_3$ 99.5%) | Silicon Carbide ($\text{SiC}$) | Aluminum Nitride ($\text{AlN}$) |
|---|---|---|---|---|---|
| Density ($\text{g/cm}^3$) | 3.20 - 3.25 | 6.05 | 3.95 | 3.15 | 3.30 |
| Flexural Strength ($\text{MPa}$) | 850 - 1100 | 900 - 1200 | 350 - 450 | 400 - 550 | 300 - 400 |
| Fracture Toughness ($\text{MPa}\cdot\text{m}^{1/2}$) | 6.5 - 8.5 | 5.0 - 10.0 | 3.5 - 4.5 | 3.0 - 4.0 | 2.5 - 3.5 |
| Thermal Conductivity ($\text{W/m}\cdot\text{K}$) | 30 - 90 (High-K up to 120) | 2.5 - 3.0 | 30 | 120 - 180 | 170 - 230 |
| Thermal Expansion ($10^{-6}/\text{K}$) | 3.0 - 3.2 | 10.5 | 8.0 | 4.0 | 4.5 |
| Max Operating Temp ($^\circ\text{C}$) | 1400 | 1000 | 1600 | 1650 | 1100 |
Navigating next-generation power electronics, electrification of transport, and extreme sub-zero to high-heat space environments.
With the shift toward 800V Silicon Carbide (SiC) inverters in Electric Vehicles, Active Metal Brazing (AMB) Silicon Nitride substrates are rapidly replacing Direct Copper Bonded (DCB) alumina. $\text{Si}_3\text{N}_4$ substrates offer 2.5 times the mechanical strength of AlN while supporting thick copper cladding ($>0.8\text{ mm}$), enabling higher power density, lower thermal impedance, and extreme thermal cycling endurance ($>10,000$ cycles from $-40^\circ\text{C}$ to $150^\circ\text{C}$).
As semiconductor node miniaturization pushes past 2nm, plasma-resistant materials are required. $\text{Si}_3\text{N}_4$ end-effectors, vacuum chucks, and chemical vapor deposition (CVD) equipment parts exhibit exceptional resistance to aggressive fluorine and chlorine cleaning plasmas, reducing particulate contamination and maximizing fab yield.
Hypersonic flight demands radome materials that combine low dielectric constant, low loss tangent, high strength, and resistance to rain erosion at speeds exceeding Mach 5. Porosity-controlled Silicon Nitride composites developed by Qiangguang deliver optimal microwave transparency and thermal resilience under severe aerodynamic heating.
How Yixing Qiangguang integrates vertical synthesis, automated sinter-HIP furnace technology, and micron-level CNC machining to guarantee scale and precision.
Unlike secondary processors, Qiangguang manages chemical synthesis of high-purity sub-micron $\alpha\text{-Si}_3\text{N}_4$ powders with tightly controlled oxygen content ($<1.2\text{ wt}\%$) and iron impurity contamination below $50\text{ ppm}$. This raw material sovereignty shields international buyers from market volatility and guarantees strict batch-to-batch chemical stability.
Our facility utilizes state-of-the-art Gas Pressure Sintering (GPS) and Hot Isostatic Pressing (HIP) operating at $1850^\circ\text{C}$ under high-pressure nitrogen gas. This eliminates internal micro-porosity, achieving $>99.9\%$ theoretical density. The resulting material exhibits superior fatigue endurance for high-stress bearing balls and industrial cutting inserts.
Silicon Nitride’s extreme hardness ($H_V > 1500\text{ kg/mm}^2$) requires specialized precision diamond tooling. Our automated CNC grinding centers produce dimensional tolerances down to $\pm 0.001\text{ mm}$ and surface roughness of $Ra < 0.01\text{ }\mu\text{m}$, meeting ultra-precise aerospace and optical mirror specifications.
By leveraging China's comprehensive industrial supply chain, low energy tariffs, and scalable production infrastructure, Qiangguang delivers high-end ceramic components at a 25% to 45% cost reduction relative to European and Japanese suppliers without compromising material purity or tolerance standard compliance.
Tailored high-performance ceramic component solutions designed to solve severe wear, high temperature, and chemical degradation challenges.
Riser tubes, protection tubes, and gas degasser rotors manufactured from Gas-Pressure Sintered $\text{Si}_3\text{N}_4$ offer zero wettability against liquid aluminum, magnesium, and zinc alloys. This eliminates corrosion, prevents slag build-up, and extends component operating lifetimes up to 10x compared to cast iron components.
Silicon Nitride hybrid bearing balls (G3/G5 precision grade) exhibit only 40% the density of steel balls while providing higher modulus of elasticity ($320\text{ GPa}$) and zero magnetic response. Used widely in high-speed CNC machine tool spindles, wind turbine gearboxes, and aerospace fuel pumps.
Check valve balls, mechanical seal rings, and dosing plungers engineered from $\text{Si}_3\text{N}_4$ eliminate galling and chemical erosion in harsh acid handling and oilfield fracturing equipment operating at fluid pressure exceeding $1000\text{ bar}$.
Rigorous international engineering standards, multi-tier QA protocols, and seamless global logistics support.
All Qiangguang production runs comply strictly with ISO 9001:2015 quality management systems, ISO 14001 environmental protocols, RoHS directives, REACH chemical compliance, and ASTM C1161 / ASTM C1421 ceramic testing protocols.
We provide full export clearance, customs brokerage, and Duty-Paid (DDP/DAP) logistics to major industrial hubs in North America, Western Europe, Southeast Asia, and Australia, supported by multi-lingual technical engineering support teams.
From initial CAD/STEP 3D model evaluation, finite element thermal modeling, and prototype rapid-tooling to high-volume production runs, our application engineers partner directly with client design teams to optimize for manufacturability (DFMA).
Expert engineering answers addressing material selection, machining limits, thermal performance, and global supply logistics.
Discover our comprehensive array of advanced industrial ceramics, high-purity powders, and grinding media options.
