Aluminum oxide threaded ceramic screw

Aluminum oxide threaded ceramic screws are threaded fasteners made from high-purity aluminum oxide through precision molding and sintering processes. It combines the high temperature resistance, corrosion resistance, and non-magnetic insulation properties of ceramic materials, while achieving reliable mechanical connections through threaded structure design, making it an ideal substitute for traditional metal screws under extreme working conditions.

FAQ: Quickly answer your questions
Q1: What is the temperature resistance range of alumina threaded ceramic screws?
A: It can maintain stable performance within a wide temperature range of -196 ℃ to 1600 ℃, with no attenuation of connection strength at 800 ℃, and can maintain structural integrity at minus 70 ℃.
Q2: What is the corrosion resistance of ceramic screws?
A: It has complete tolerance to strong acids (such as concentrated hydrochloric acid), strong bases (such as sodium hydroxide), and high-temperature steam environments, and its lifespan is 3-5 times that of metal screws in chemical pump valves, wet metallurgy, and other scenarios.
Q3: Can non-standard specifications be customized?
A: Support M1-M200 full-size customization, thread types include metric, imperial, trapezoidal threads, etc., and can process irregular structures (such as positioning grooves, stepped shafts, etc.) according to drawings.
Q4: How to solve the brittleness of ceramic screws compared to metal screws?
A: By optimizing the grain structure through graded pressure holding and isostatic pressing process, combined with precise firing shrinkage control of 15.5%, the elastic modulus reached 340-345GPa, the impact strength increased to 665-670MPa, and the brittleness was significantly reduced.

Core Value: Solving the Three Major Problems of Users
Extreme environmental adaptability: In scenarios such as high-temperature fuel cells and semiconductor etching equipment, metal screws are prone to oxidation and corrosion, while ceramic screws can operate stably for a long time, reducing equipment downtime and maintenance costs.
Non magnetic insulation requirement: In magnetic field sensitive scenarios such as MRI medical equipment and electron microscopes, ceramic screws avoid metal interference and ensure equipment accuracy.
Lightweight and High Strength: With a density of only 3.9g/cm ³, it is 40% lighter than titanium alloy and has a compressive strength of 2000-5000MPa, meeting the lightweight and high-strength requirements of aerospace, satellite brackets, and other industries.

Product advantage: Technology driven differentiated competitiveness
Material purity control: Two grades of 95 ceramic (Al ₂ O ∝ ≥ 95%) and 99 ceramic (Al ₂ O ∝ ≥ 99.5%) are provided. The metal impurity content of 99 ceramic products is ≤ 50ppm, meeting the ultra-low pollution requirements of semiconductor equipment.
Precision machining capability: using a five axis machining center and CNC ceramic special machine tool, the surface roughness Ra of the thread is ≤ 0.1 μ m, the coaxiality is ≤ 0.01mm, and it supports deep hole thread machining (depth to diameter ratio ≥ 5:1).
Innovation in sintering process: gradient and segmented calcination process, with high-temperature insulation at 1600 ℃ and slow cooling for 48-72 hours, improves grain size uniformity by 30% and thermal shock resistance (Δ T ≥ 300 ℃) better than industry standards.

Application scenarios and cases: from laboratory to industrialization practice
Case 1: Key components of semiconductor equipment
A customer on a 12 inch wafer production line originally used alumina ceramic screws for fixing the vacuum chamber of the etching machine, which had problems with long delivery cycles (12 weeks) and high costs (2800 yuan per piece). After switching to our company’s 99 ceramic screw, we have achieved substitution through the following optimization:
The dimensional tolerance has been increased from ± 0.05mm to ± 0.01mm to meet the assembly requirements of various equipment;
The surface is treated with anodizing, which extends the plasma erosion resistance life to over 2000 hours;
Customized trapezoidal thread design reduces unit cost to ¥ 1200 and shortens delivery time to 3 weeks.
Case 2: Insulation fixation of new energy vehicle battery pack
A leading new energy vehicle company used plastic screws in the fixing of battery pack molds, which had insufficient temperature resistance (long-term use temperature ≤ 80 ℃) and creep problems. After switching to our alumina ceramic screw:
The temperature resistance has been improved to 150 ℃, meeting the requirements of the battery thermal management system;
Volume resistivity ≥ 1 × 10 ¹⁴Ω· cm to avoid the risk of high voltage arc;
By optimizing the thread profile through finite element analysis, the shear strength has been increased by 40%.

Whether you need standard parts or customized special shapes, we can provide one-stop services from material selection, structural design to mass production. Click to consult for free technical solutions and quotes.

Brudeze Ceramics supplies and sells a wide range of high-quality quartz glass, including alumina ceramics, zirconia ceramics, silicon nitride ceramics, aluminum nitride ceramics, silicon carbide ceramics, boron carbide ceramics, bioceramics, machinable ceramics, etc. We can meet the customization requirements of various ceramic products.