Engineered for extreme thermal, mechanical, and ultra-high vacuum (UHV) operational environments.
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.
Analyzing the structural shift toward ultra-high vacuum (UHV), high-dielectric breakdown, and advanced metallization technology across global high-tech sectors.
Modern semiconductor fabrication equipment (such as EUV lithography, atomic layer deposition, and plasma etching chambers) requires vacuum components capable of maintaining pressures below 10⁻⁸ Pa. Advanced alumina (Al₂O₃) and aluminum nitride (AlN) vacuum ceramic feedthroughs are replacing traditional glass-to-metal seals due to their vastly superior helium leak tightness, zero outgassing under thermal cycling, and high mechanical rigidity.
The industry is rapidly shifting from classic Molybdenum-Manganese (Mo-Mn) refractory metallization to Direct Copper Bonding (DCB) and Active Metal Brazing (AMB) using Ag-Cu-Ti alloys. AMB ceramic-metal assemblies offer significantly higher thermal dissipation, enhanced peel strength (> 100 N/mm), and thermal shock endurance required by wide-bandgap (SiC/GaN) power electronics and high-power laser diodes.
Engineers are increasingly specifying custom ceramic formulations (such as Yttria-Stabilized Zirconia and Silicon Nitride) with exact Coefficients of Thermal Expansion (CTE) matched to Kovar, Niobium, Molybdenum, and Stainless Steel. This precise CTE matching minimizes residual interfacial shear stress during high-temperature vacuum sintering and long-term cyclic operation.
A comprehensive technical comparison of key vacuum ceramic substrates manufactured by Yixing Qiangguang Ceramic Materials Co., Ltd.
| Material Type | Purity / Formula | Density (g/cm³) | Thermal Conductivity (W/m·K) | Dielectric Strength (kV/mm) | Flexural Strength (MPa) | Vacuum Hermeticity |
|---|---|---|---|---|---|---|
| High-Purity Alumina | 99.5% - 99.9% Al₂O₃ | 3.92 - 3.96 | 30 - 35 | 18 - 25 | 380 - 450 | < 1×10⁻¹¹ Pa·m³/s |
| Aluminum Nitride (AlN) | > 99% AlN | 3.26 | 170 - 230 | 15 - 20 | 320 - 400 | < 1×10⁻¹⁰ Pa·m³/s |
| Silicon Nitride (Si₃N₄) | Gas Pressure Sintered | 3.22 | 25 - 80 | 18 - 22 | 850 - 1100 | < 1×10⁻¹¹ Pa·m³/s |
| Yttria-Stabilized Zirconia (YSZ) | 3 mol% Y₂O₃-ZrO₂ | 6.05 | 2.5 - 3.0 | 10 - 12 | 1000 - 1200 | < 1×10⁻¹¹ Pa·m³/s |
| Magnesium Oxide (MgO) | > 98% MgO | 3.58 | 45 - 60 | 12 - 16 | 220 - 280 | High Vacuum Suitable |
| Aluminium Titanate (Al₂TiO₅) | Stoichiometric Phase | 3.35 - 3.60 | 1.5 - 2.5 | 8 - 10 | 40 - 80 (Thermal Shock) | Medium/High Temp Isolation |
In ultra-high vacuum (UHV) systems, any micro-porosity or virtual leaks caused by trapped gases can degrade system ultimate pressure. Yixing Qiangguang utilizes Cold Isostatic Pressing (CIP) combined with high-temperature vacuum sintering to achieve bulk densities exceeding 99.6% of theoretical maximum, eliminating open porosity and delivering zero detectable outgassing.
Achieving sub-micron dimensional tolerances (+/- 0.002mm) and surface roughness Ra < 0.1 µm is critical for vacuum seals. Our state-of-the-art 5-axis CNC diamond grinding facility enables complex geometry fabrication, including micro-flanges, threaded ceramic shafts, stepped isolators, and pre-metallized Mo-Mn/Ni or Au/Ni layers ready for direct brazing.
How leading international OEMs evaluate vacuum ceramic manufacturers in China and deploy full-chain engineered ceramic solutions.
Substrates, end-effectors, gas distribution plates, and ceramic vacuum chambers require exceptional resistance to fluorine/chlorine plasma erosion. Our high-purity alumina (99.8%) and YSZ components deliver extended service lifetimes in semiconductor etching, sputtering, and PECVD equipment.
High-power laser diode submounts and RF ceramic housings require ultra-high thermal dissipation to prevent heat accumulation. Aluminum Nitride (AlN) ceramics with thermal conductivity > 200 W/m·K provide the ultimate thermal management platform for optical pump modules and laser cavities.
High-voltage EV DC contactors and vacuum interrupter switches require ceramic envelopes capable of dielectric isolation > 30 kV and arc resistance. Our precision alumina switch shells ensure safe energy switching in electric vehicles and smart grid infrastructure.
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.
Whether providing high-toughness Yttria-Stabilized Zirconia for medical scalpels and pumps, or low-expansion Aluminium Titanate for molten metal handling, Yixing Qiangguang delivers tailor-made chemical formulations and precision geometries engineered to exact customer specifications.
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. It is supported by high-quality after-sales services and a strict full-process tracking system, which effectively enhances cooperation efficiency and promotes continuous quality improvement.
At present, the company's products are sold well across the country and exported to Italy, the United Kingdom, Australia, Japan, Malaysia, Thailand, Hungary and other countries and regions. Committed to delivering high-quality products at reasonable prices, Qiangguang sincerely looks forward to establishing long-term and stable cooperative relations with global partners.
We offer comprehensive OEM/ODM engineering support, fast sample prototyping within 15 business days, standard DDP/FOB international shipping logistics, and dedicated technical consultation for seamless supply chain integration worldwide.
Pioneering next-generation advanced ceramic synthesis, additive manufacturing, and extreme-environment engineering.
Yixing Qiangguang is advancing Stereolithography (SLA) ceramic 3D printing techniques for alumina and zirconia. This enables complex internal cooling channels, weight-reduced hollow structures, and rapid prototype turnarounds without costly hard tooling.
By refining grain boundary chemistry at the nanometer scale, our R&D team is achieving higher fracture toughness in YSZ (> 12 MPa·m1/2) and superior thermal shock resistance in Silicon Nitride components engineered for next-gen aerospace propulsion.
Next-generation optical telecommunication and high-voltage power grids require ceramic substrates with thermal conductivities exceeding 230 W/m·K. Our continuous sintering process improvements aim to lower grain boundary thermal resistance to reach theoretical limits.
Expert insights addressing common engineering, manufacturing, and sourcing inquiries regarding vacuum ceramics.
High-purity alumina offers an exceptional combination of near-zero open porosity, minimal outgassing under deep vacuum conditions, high dielectric strength (> 20 kV/mm), and high mechanical stability. Its capability to form strong hermetic bonds with metals via refractory metallization (Mo-Mn) or active metal brazing makes it the industry standard for UHV feedthroughs, isolators, and viewports.
YSZ exhibits significantly higher flexural strength (up to 1200 MPa) and fracture toughness compared to alumina (380-450 MPa), making it ideal for high-impact, high-wear, or high-stress mechanical parts such as valve seats, plungers, and cutting tools. However, Alumina possesses higher thermal conductivity (30 W/m·K vs 3 W/m·K for YSZ) and superior electrical insulation at elevated temperatures.
Every manufactured vacuum ceramic batch undergoes rigorous Helium Mass Spectrometer Leak Detection testing following vacuum thermal annealing. Components are tested to achieve leak rates stricter than 1×10⁻¹¹ Pa·m³/s, ensuring zero micro-fissures or virtual leaks before dispatch.
We offer Molybdenum-Manganese (Mo-Mn) metallization followed by Nickel electroplating, Direct Copper Bonding (DCB), Active Metal Brazing (AMB with Ag-Cu-Ti), and Thin-Film Sputtering (Ti-Pt-Au). The choice depends on the application temperature, joint electrical conductivity requirements, and mating metal alloy (e.g., Kovar, Stainless Steel, Copper).
Yes. We specialize in custom OEM manufacturing. Our engineers work directly from 2D/3D CAD models (STEP, IGES, DWG) using precision CNC diamond grinding, ultrasonic machining, and laser micro-drilling to achieve tight tolerances down to ±0.002 mm.
Standard prototype samples are produced in 2 to 3 weeks depending on geometry and tooling needs. Mass production lead times typically range from 3 to 5 weeks. Accelerated express production channels are also available for urgent engineering projects.
All advanced ceramic products manufactured by Yixing Qiangguang strictly comply with ISO9001:2015 quality management systems, as well as EU RoHS and REACH environmental safety regulations.
Aluminum Nitride offers a thermal conductivity (170-230 W/m·K) nearly 7 times higher than Alumina, paired with a CTE close to Silicon (4.6×10⁻⁶/K). This makes AlN the superior choice for high-power semiconductor die attachment where heat dissipation and thermal expansion matching are paramount to prevent solder fatigue.
Explore our premium-grade ceramic powders and specialized engineered formulations for global industrial deployment.
