95% Sintering Alumina Ceramic Stirring Rod for High-purity Interference-free Stirring Operation

95% Sintering Alumina Ceramic Stirring Rod for High-purity Interference-free Stirring Operation

Product Description

The 95% Ceramic Stirring Rods are manufactured as solid, single-piece units using 95% high-purity alumina (with an option to upgrade to 99% ultra-high-purity material). They are fully customizable, with rod diameters ranging from 6 to 15 mm and total lengths from 150 to 400 mm; available in both tapered-tip and rounded-tip designs, they feature an optional hole at the end for suspension. The ceramic body is dense and non-porous, offering resistance to strong acids and alkalis without leaching impurities into the material being processed. Characterized by high hardness and wear resistance—ensuring no chipping—they withstand high temperatures and thermal shock, resisting deformation or breakage during high-speed stirring. Their smooth, burr-free surface prevents scratching of glassware, making them the premier corrosion-resistant tool for high-purity, contamination-free stirring operations.

Product Standard Size Range

1. Shank diameter: 6mm, 8mm, 10mm, 12mm, 15mm
2. Total length: 150mm, 200mm, 250mm, 300mm, 350mm, 400mm; custom extended lengths available
3. Head style: available in tapered point or flat-round head designs; the tail end can be machined with a hole for convenient hanging or securing
4. Overall structure: solid, one-piece construction with no seams or joints

Product Advantages

1. Exceptional Corrosion Resistance

Alumina ceramics possess extremely stable chemical properties and excellent chemical inertness. They withstand corrosion from strong acids, strong alkalis, and most organic solvents. They do not react chemically in corrosive media during long-term use, effectively preventing material contamination during stirring and ensuring product purity.

2. Superior Wear Resistance

With a Mohs hardness of 9—second only to diamond—its wear resistance is tens to hundreds of times greater than that of ordinary metal materials. Under high-speed stirring and grinding conditions, the surface resists scratching and wear, offering a service life far exceeding that of traditional stirring rods made from stainless steel or PTFE.

3. Excellent High-Temperature Resistance

With a melting point of 2050°C, the material operates stably at temperatures up to 1600°C for extended periods and withstands short-term temperatures exceeding 1750°C. It features a low thermal expansion coefficient (7–8 × 10⁻⁶/°C) and excellent thermal shock resistance, preventing cracking or deformation during rapid temperature fluctuations.

4. Outstanding Electrical Insulation

It offers a volume resistivity >10¹⁴ Ω·cm, a dielectric strength of 15–20 kV/mm, and a DC breakdown strength of 17.6–20 kV/mm. It provides reliable electrical insulation in high-voltage and high-frequency environments, making it suitable for electrified stirring applications and the precision electronics industry.

5. High Mechanical Strength

At room temperature, it exhibits a compressive strength ≥850 MPa, a flexural strength ≥290 MPa, and a fracture toughness ≥4.8 MPa·m¹/². Combining high hardness with good toughness, it withstands significant mechanical stress and impact loads, ensuring stability and reliability during the stirring process.

6. Contamination-Free and Food-Grade Safe

The material is non-toxic, non-magnetic, and non-adsorptive. Its surface is smooth and dense (water absorption <0.08%), inhibiting bacterial growth. It meets food-grade and pharmaceutical-grade hygiene standards, making it ideal for production environments requiring extreme cleanliness.

Product Specifications

Molding Process

Application Areas

1.Chemical Industry

Reactor agitation: resistant to acid and alkali corrosion; suitable for stirring and mixing highly corrosive media such as sulfuric acid, hydrochloric acid, and sodium hydroxide.

Catalyst support: high specific surface area and excellent chemical stability; enhances catalytic efficiency.

2.Laboratory Research

High-temperature experimental stirring: used in conjunction with high-temperature furnaces for material melting and sintering experiments.

Precision chemical analysis: high-purity materials prevent sample contamination, ensuring the accuracy of experimental data.

3.Food & Pharmaceuticals

Pharmaceutical reaction mixing: GMP-compliant, non-toxic, and contamination-free, ensuring pharmaceutical safety.

Food additive mixing: Resistant to organic acid corrosion; meets food-grade hygiene standards.

4.Electronics & Electrical

Insulated mixing components: safe mixing of conductive and electronic pastes in high-voltage environments

Semiconductor processing: high-purity alumina prevents metal ion contamination; suitable for wafer manufacturing

5.Metallurgical Casting

High-temperature molten metal stirring: stirring and degassing of molten metals such as aluminum and copper.

Glass furnaces: used in conjunction with quartz ceramics for stirring and homogenizing the melt during the glass melting process.

Why choose our alumina ceramic stirring rods?

Ordering Information

1.Customization Services:

   Custom manufacturing based on provided drawings or samples; supports complex geometries, threading, surface treatments, etc.

   Recommendations for the optimal purity grade (95% / 99% / 99.7%) based on specific operating conditions.

   Sample testing services available to ensure product compatibility.

2.Packaging & Logistics:

   Packaged with shock-absorbing foam and cartons/wooden crates to ensure safe transport.

   Domestic and international shipping available.

3.Technical Support:

   Professional engineering team provides guidance on product selection and after-sales technical support.

   Comprehensive quality control system; every batch undergoes rigorous testing for density, hardness, strength, and more.

Our workshop

Why choose us?

1.Customized R&D, rather than standard product adaptation

2.Deep control of materials science：Material Selection Based on Needs，Microstructure Optimization，Batch Consistency

3.Precision machining capability：Flatness can reach 0.001mm, parallelism 0.002mm, and roughness Ra 0.1μm.

FAQ

Q1: What products does your company offer?

We specialize in high-performance ceramics such as alumina and silicon nitride, providing insulators, structural components, wear-resistant parts, and customized solutions.

Q2: Can you customize non-standard parts?

Yes. We support processing based on provided drawings and collaborative technical development, offering a full-process service from design to mass production.

Q3: What about accuracy and delivery time?

Standard tolerance ±0.05mm, precision grade ±0.01mm; samples 7-15 days, bulk orders 20-30 days.

Q4: Main application areas?

Power, electronics, machinery, chemical, and aerospace industries.

Q5: Quality assurance measures?

Full-process quality inspection, providing material reports and performance test data, supporting third-party certification and testing.

Q6: Do you provide technical support?

We provide professional support such as material selection consultation, design optimization, and failure analysis.