Cerval Industries

Alumina Ceramic Seals

At Cerval Industries, we take pride in manufacturing the highest quality Alumina ceramic seals that set the standard for precision and reliability in sealing technology. Our seals are crafted with meticulous attention to detail, using premium-grade Alumina (Al2O3) known for its exceptional mechanical strength, thermal resilience, and superior resistance to corrosion and wear. Designed to perform flawlessly in extreme temperatures and challenging chemical environments, our seals excel in diverse industries including aerospace, automotive, semiconductor manufacturing, and medical devices. Our commitment to excellence is evident in every stage of manufacturing. From the careful selection of raw materials to advanced fabrication techniques, such as precision molding and high-temperature sintering, we ensure that each seal meets stringent quality standards. Rigorous quality control measures, including dimensional checks and surface finish evaluations, guarantee uniformity and reliability across our product line.

We understand the critical role of seals in maintaining operational efficiency and safety. That's why our experienced team collaborates closely with clients to customize seals according to specific application requirements. Whether it's optimizing dimensions, enhancing chemical resistance, or adapting to unique operating conditions, we provide tailored solutions that maximize performance and durability.

Specification	Details
Materials	Alumina (Al2O3)
Temperature Resistance	Up to 1700°C
Mechanical Strength	High compressive strength and hardness
Chemical Resistance	Excellent resistance to corrosion and chemical attack
Applications	Sealing applications in aerospace, automotive, semiconductor, and medical industries

Ceramic Technical Properties

Properties	Units	92%	95%	99%
Bulk Density	g/cm³	3.6	3.7	3.85
Hardness	HRA ≥	80	86	88
Flexure Strength	MPa ≥	145	300	350
Max. Temperature	°C	1500	1500	1600
Linear Expansion Coefficient	x10^-6/°C	7.5	7.5	8.2
Dielectric Constant	-	9	9	9.2
Dielectric Loss	tan δ x10^-4	16	3	2
Volume Resistivity	Ω·cm	10^12	10^13	10^14
Disruptive Strength	KV/mm, DC ≥	8	20	20
Acid Resistance	mg/cm²	0.7	0.7	0.7
Alkali Resistance	mg/cm²	0.2	0.2	0.1
Abrasion Resistance	mg/cm²	0.2	0.2	0.1
Compressive Strength	MPa ≥	1800	2500	2500
Rupture Strength	MPa ≥	200	200	350
Elastic Modulus	GPa	300	300	350
Poisson's Ratio	-	0.22	0.2	0.22
Thermal Conductivity	W/m·K	20	20	25

Characteristics

High Hardness and Wear Resistance - Ceramic seals are extremely hard, making them highly resistant to wear and abrasion.

Ceramics are chemically inert and resistant to most acids, alkalis, and solvents.

Low Thermal Expansion - They have a low coefficient of thermal expansion, which means they maintain dimensional stability even under fluctuating temperatures.

Low Density - Ceramics are typically lighter than metals, which can be beneficial in applications where weight is a concern.