Super hard high temperature chemical resistant alumina ceramic pins

General Introduction of Alumina Ceramic Pins

Alumina ceramic pins are made from high-purity alumina (Al₂O₃) powder through a series of complicated processes such as batching, molding, and high-temperature sintering by means of exquisite ceramic processing technology. They are usually in pin or rod shape and come in a variety of sizes that can be customized for different applications to meet the stringent requirements for precision and performance in industrial and medical fields.

Characteristics of Alumina Ceramic Pins

High hardness and wear resistance: Alumina ceramic pins show outstanding hardness, second only to diamond, Mohs hardness up to 9, Vickers hardness between 1800 – 2000HV. This characteristic gives it excellent toughness in the face of high-intensity friction and wear, whether it is used as a measuring tool and precision parts in machining, and all kinds of hard materials in frequent contact, or in the repeated operation of medical and surgical instruments, can always maintain the sharpness of the tip and precision, the service life of far more than the traditional metal pins, significantly reducing the frequency of replacement and maintenance costs.

Excellent chemical stability: its chemical stability is amazing in the face of most inorganic acids, alkalis and organic solvents erosion, can be calm, and performance is not affected. The chemical corrosion environment is extremely harsh industrial production processes and the biocompatibility of materials and corrosion resistance requirements of the medical device field, such as long-term contact with human tissue fluid implantable medical sensors, puncture pins, etc., alumina ceramic pins with a solid chemical structure, to ensure that their own corrosion degradation, but also does not react with the surrounding substances, to protect the equipment and the safety of human beings.

Excellent insulating properties: In terms of electrical properties, alumina ceramic pins are the best. It has excellent electrical insulation, dielectric strength of more than 15kV/mm, dielectric constant between 9 – 10 (1MHz), dielectric loss angle tangent less than 0.0002 (1MHz).

Good thermal stability: Alumina ceramic pins have a wide range of operating temperatures, from -50°C to 1800°C (intermittent use), and up to 1500°C for continuous use, with a low coefficient of thermal expansion of 7.5 – 8.0×10-⁶ /°C (20 – 1000°C).

Specifications table of Alumina Ceramic Pins

Specification	Details
Material Composition	High-purity alumina (Al₂O₃) with typical content >99.5%
Density	3.95–4.00 g/cm³
Hardness	Mohs hardness: 9; Vickers hardness: 1800–2000 HV
Flexural Strength	350–450 MPa
Compressive Strength	>2500 MPa
Tensile Strength	100–150 MPa
Thermal Conductivity	20–30 W/m·K
Thermal Expansion	7.5–8.0 x 10⁻⁶ /°C (20–1000°C)
Dielectric Strength	>15 kV/mm
Dielectric Constant	9–10 (1 MHz)
Loss Tangent	<0.0002 (1 MHz)
Chemical Resistance	Excellent resistance to acids and alkalis except hydrofluoric acid (HF)
Operating Temperature	-50°C to 1800°C (intermittent); continuous use up to 1500°C
Surface Finish	Available in polished, ground, or as-sintered finishes
Tolerance	±0.1 mm (standard); tighter tolerances available upon request
Applications	Surgical needles, wear parts, insulators, cutting tools, chemical processing parts, electronic components
Color	White or off-white
Customization	Available in various sizes and shapes; custom machining services provided

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Applications of Alumina Ceramic Pins

Machining field: In the machining shop, an alumina ceramic pin is often used as a key component of high-precision gauges, such as in the coordinate measuring machine as a measuring probe, by virtue of its high hardness, abrasion resistance and good dimensional stability, it can accurately measure the complex components of the small dimensional deviation for aerospace and automotive manufacturing and other high-end manufacturing of precision parts quality control to provide key data support; also used in the manufacture of precision machinery, positioning pins, clamps, and so on. It is also used to manufacture positioning pins and jig pins for precision machinery, ensuring accurate positioning of parts in the processing and assembly process and improving overall manufacturing accuracy and efficiency.

Electronic industry: In electronic factories, alumina ceramic pins are a powerful assistant in the packaging and testing of electronic components. In the chip packaging process, as a lead frame material for the chip and the external circuit to build a stable connection bridge, and its excellent insulation to prevent chip signal interference and short circuits; in the electronic component performance testing equipment, as a probe material, accurate piercing the tiny test point, stable on-current detection component parameters, help improve the quality of electronic products to meet the development of electronic products to miniaturize, high-performance needs.

Medical field: Alumina ceramic pins are ubiquitous in medical operating rooms. Puncture pins, using their high hardness and wear resistance, can accurately penetrate human tissue and reduce tissue damage; with excellent biocompatibility and corrosion resistance, does not trigger the body’s immune response to ensure surgical safety; dental restoration field, alumina ceramic pins made of dental drills, both high hardness and bio-security, efficiently cutting dental tissues, to create a precision crown, bridges, to enhance the effect of the patient’s dental restorations and the use of comfort! In implantable medical sensors, alumina ceramic pins are used as encapsulation and signal transmission components, which work stably in the complex physiological environment of the human body for a long time and provide an accurate basis for doctors to monitor patient’s physiological data in real time.

Aerospace and scientific research: In aerospace missions, alumina ceramic pins are used to manufacture high-temperature sensor probes to accurately monitor temperature, pressure and other key parameters in the high-temperature region of the engine, and its high-temperature resistance and excellent insulation properties ensure accurate signal transmission to ensure the safe operation of the aircraft; in scientific research laboratories, as a precision experimental instruments, micro-manipulation pins, micro-injection pins to help scientists carry out fine manipulation and research on a cellular level, promoting biomedicine, scientific research and development, as well as the development of the medical industry. In scientific research laboratories, micro-manipulation pins and micro-injection pins, as precision experimental instruments, help scientists carry out delicate operations and research at the cellular level and promote the exploration of biomedicine, materials science and other frontier fields.

Company Profile

Alumina Technology Co., Ltd.! We focus on the research and development, production and sales of alumina products, serving the electronics, ceramics, chemical and other industries. Since its establishment in 2005, the company has been committed to providing customers with the best products and services, and has become a leader in the industry through continuous technological innovation and strict quality management.

Our products includes but not limited to Alumina Boat, Alumina Crucible, Alumina Dish, Alumina Foam Filter, Alumina Plate, Alumina Rod, Alumina Bar, Alumina Balls, Filter Alumina, Nano Alumina Powder, Spherical Alumina Powder, ect. please feel free to contact us.(nanotrun@yahoo.com)

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs Of Alumina Ceramic Pins

Q1: Do alumina ceramic pins have good insulating properties?

Alumina ceramic pin has excellent electrical insulation properties, its dielectric strength of more than 15kV/mm, dielectric constant between 9 – 10 (1MHz), dielectric loss angle tangent less than 0.0002 (1MHz). These good insulation properties make it in the electronics industry widely used as electronic components of lead, insulation probes, etc., and can effectively prevent current leakage and short-circuit phenomenon to protect the stable operation of electronic equipment.

Q2: Can alumina ceramic pins be customized?

Alumina ceramic pins can be customized according to customers’ specific needs. Size, shape, surface treatment, etc., can be adjusted according to the application requirements. For example, pins of different lengths and diameters, as well as pins with polished or special coatings, can be customized to meet the needs of specific industrial or medical applications.

Q3: Do alumina ceramic pins have a long service life?

Due to their high hardness and wear resistance, alumina ceramic pins typically have a long service life. Under normal conditions of use, it is able to withstand a great deal of wear and impact without damage. This makes it possible to significantly reduce maintenance costs and the frequency of replacement in application scenarios that require frequent pin changes, such as electronic component testing, machining, etc.

Q4: Are alumina ceramic pins lightweight?

Alumina ceramic pins have a relatively low density of approximately 3.95 – 4.00 g/cm³. This makes it lightweight while maintaining high strength and performance, making it easy to use in applications where weight is critical, such as aerospace and precision instruments.

Q5: Are alumina ceramic pins expensive?

The price of alumina ceramic pins varies depending on factors such as material purity, processing accuracy, size specifications and customization requirements. Generally speaking, the price is relatively high due to its high purity raw material and complex processing. However, considering its excellent performance and long service life, it is cost-effective in terms of long-term cost of use.