95% Alumina Ceramic

95% Alumina Ceramic: The Versatile Industrial Ceramic for High-Performance Applications

In the industrial ceramic family, alumina ceramic stands out as one of the most widely used and core materials, thanks to its excellent comprehensive performance and cost-effectiveness. Specifically, 95% alumina ceramic strikes a perfect balance between performance and cost, making it the preferred choice for numerous industrial sectors.

Durable, Cost-Effective Engineering Ceramic for Diverse Industrial Sectors

I. Material Overview: What is Alumina Ceramic?

Alumina ceramic is a special ceramic material with aluminum oxide (Al₂O₃) as the main crystalline phase. It is classified into multiple grades based on purity (e.g., 95%, 99%, 99.5%), among which 95% alumina ceramic is the most widely used engineering ceramic.

Composed of 95% alumina and approximately 5% other oxide additives (such as SiO₂ and CaO), these additives facilitate the formation of a denser, stronger microstructure during sintering at 1600-1650°C. Compared to higher-purity 99% alumina ceramic, 95% alumina retains excellent performance while offering greater cost advantages, delivering exceptional value for money.

II. Core Properties & Performance Advantages

95% alumina ceramic integrates multiple outstanding properties to meet the demands of harsh industrial applications:

Superior Mechanical Performance

High Hardness & Wear Resistance: Vickers hardness reaches 1450-1600 HV (second only to diamond), effectively resisting various types of wear and significantly extending equipment lifespan.
High Strength: Excellent flexural strength to withstand heavy mechanical loads.
High Compressive Strength: Capable of bearing extreme pressure, ideal for heavy machinery and sealing components.

Excellent Electrical Insulation

Boasting a volume resistivity of over 10¹⁴ Ω·cm at 20°C and high dielectric strength, it is an ideal material for electronic insulation and circuit substrates, ensuring stable operation of electronic devices under high voltage.

Reliable Thermal Performance

High Temperature Resistance: Sustains long-term use at temperatures above 1200°C in air, with short-term resistance to higher temperatures.
Thermal Stability: Moderate thermal conductivity, low thermal expansion coefficient, and good thermal shock resistance.

Outstanding Chemical Corrosion Resistance

Resists erosion from most acids, alkalis, and organic solvents (except hydrofluoric acid and hot concentrated alkalis), suitable for corrosive environments in chemical, medical, and other industries.

III. Product Series & Performance Comparison

Beyond the classic 95% alumina ceramic, we offer a full range of alumina ceramic solutions to meet higher requirements across diverse applications. The table below compares key performance parameters of our selected alumina products, showcasing the performance gradient with increasing purity:

Property	Unit	A-100 (97% Al₂O₃)	A-200 (99.5% Al₂O₃)	A-300 (99.7% Al₂O₃)
Density	g/cm³	3.75	3.9	3.92
Flexural Strength	MPa	280	320	370
Vickers Hardness	HV1	1450	1550	1600
Thermal Conductivity	W/m·K	25	32	32
Maximum Service Temperature (Air)	°C	1200	1400	1650

As shown, hardness, strength, thermal conductivity, and high-temperature resistance improve with increasing alumina purity. Customers can select the optimal grade based on their product’s performance, lifespan, and cost requirements.

IV. Wide-Ranging Applications

95% alumina ceramic is used across nearly all industrial sectors, including:

Electrical & Electronic Industry

Applications: Circuit substrates, insulators, semiconductor packaging, spark plug insulators.
Advantages: Leverages excellent insulation, moderate thermal conductivity, and hermeticity.

Mechanical & Wear-Resistant Applications

Applications: Sealing rings, bushings, valve components, sandblasting nozzles, textile ceramic guides.
Advantages: Outperforms metal parts with high hardness, wear resistance, and corrosion resistance, ensuring longer service life.

Chemical & Medical Fields

Applications: Chemical pump liners, laboratory crucibles, mortars, wear-resistant components for artificial joints.
Advantages: Biologically inert, corrosion-resistant, and non-toxic.

High-Temperature Industrial Sector

Applications: Furnace tubes, thermocouple protection tubes, refractory supports, glass melting components.
Advantages: Exceptional high-temperature resistance and thermal shock resistance.

V. Conclusion

Whether you need cost-effective 95% alumina ceramic or high-purity 99.7% alumina for extreme performance, we provide professional material solutions and precision ceramic component manufacturing. Our advanced ceramic technologies help customers enhance product performance and reduce overall costs.

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