Description
Product Overview
The COORSTEK Alumina 96% fully fired ceramic substrate sheet is engineered for precision and durability in demanding industrial environments. Measuring 4.5 × 4.5 inches with a nominal thickness of 0.035 inch (35 mil), the sheet meets a tight thickness tolerance of ±10% and dimensional tolerances of ±1.5% on length and width. The camber specification of .003 IN/IN and a corner radius of .125 inch further ensure consistent flatness and ease of handling during fabrication and assembly processes.
Manufactured from high‑purity alumina (96 % Al₂O₃) using a fully fired ceramic process, this sheet exhibits superior electrical insulation, thermal conductivity, and chemical resistance. The fully fired nature eliminates the need for post‑firing, reducing lead times and simplifying inventory management for manufacturers who require ready‑to‑use components. The sheet’s weight of 1.76 ounces per piece contributes to lightweight system designs without compromising structural integrity.
COORSTEK’s rigorous quality control procedures include dimensional verification, surface finish inspection, and mechanical strength testing. Each batch is tracked with a unique lot number, and the product holds an Amazon Best Sellers Rank of #79 in Ceramic Sheets, reflecting its popularity among engineers and procurement specialists seeking reliable ceramic substrates.
Designed for compatibility with a wide range of industrial applications, the sheet’s flat, smooth surface is suitable for bonding, coating, and laminating processes. Its high alumina content provides excellent resistance to oxidation and corrosion, making it a preferred choice for environments where exposure to aggressive chemicals or high temperatures is routine.
Usage
In high‑temperature processing equipment, the Alumina 96% sheet serves as a stable platform for heating elements, sensor housings, and dielectric barriers. Its ability to maintain dimensional stability at temperatures exceeding 1500 °C enables reliable operation in furnaces, kilns, and thermal treatment chambers. Engineers often integrate the sheet into custom tooling where precise thickness and flatness are critical for uniform heat distribution.
Electronic packaging applications benefit from the sheet’s excellent dielectric properties. It is commonly used as an insulating substrate for power modules, RF components, and high‑frequency circuits where low loss and high breakdown voltage are essential. The sheet’s smooth surface facilitates the application of conductive tracks, solder masks, and protective coatings, ensuring consistent performance across production runs.
Wear‑resistant components such as valve seats, pump liners, and abrasive-resistant plates also leverage the sheet’s hardness and chemical inertness. The uniform corner radius and controlled camber reduce stress concentrations, extending service life in mechanical assemblies that experience cyclic loading or abrasive contact.
Because the sheet is lightweight yet robust, it is favored in aerospace and automotive prototyping where weight savings translate to efficiency gains. Its dimensional accuracy supports rapid prototyping workflows, allowing designers to iterate quickly without sacrificing material performance.
Why Choose Us
COORSTEK has a long history of delivering high‑quality ceramic materials to the industrial sector. Our state‑of‑the‑art manufacturing facilities employ advanced sintering techniques and strict environmental controls to produce sheets that meet exacting specifications. Each sheet undergoes a multi‑stage inspection process, including laser‑based dimensional measurement and surface profilometry, ensuring that every unit conforms to the stated tolerances.
We understand the critical nature of supply chain reliability for manufacturers. COORSTEK maintains a robust inventory management system that guarantees consistent availability of the Alumina 96% sheet, minimizing lead times and supporting just‑in‑time production schedules. Our responsive customer service team provides technical assistance, material data sheets, and design guidance to help engineers integrate the product seamlessly into their projects.
Our commitment to sustainability is reflected in the use of environmentally responsible raw materials and energy‑efficient firing processes. The fully fired nature of the sheet reduces waste associated with post‑processing, aligning with green manufacturing initiatives and helping customers achieve compliance with environmental standards.
Quality assurance is reinforced by certifications such as ISO 9001 and compliance with industry standards for ceramic substrates. By choosing COORSTEK, partners gain access to a trusted supplier that prioritizes product integrity, traceability, and continuous improvement.
Key Features
- Precise 0.035 inch (35 mil) thickness with ±10% tolerance for exact fit in tight assemblies.
- High‑purity 96 % alumina composition delivers superior electrical insulation and thermal stability.
- Fully fired ceramic process eliminates post‑firing steps, reducing lead time and handling costs.
- Flat surface with .003 IN/IN camber and .125 inch corner radius ensures easy integration and reduced stress points.
- Dedicated technical support and after‑sales service provide guidance from design to implementation.
FAQ
What temperature range can the Alumina 96% sheet withstand?
The sheet is rated for continuous operation up to 1500 °C (2732 °F) and can tolerate short‑term exposure to even higher temperatures without loss of structural integrity or dimensional stability.
Is the sheet compatible with standard PCB manufacturing processes?
Yes. The smooth, fully fired surface accepts typical PCB processes such as copper plating, solder mask application, and epoxy bonding. Its dielectric properties make it suitable for high‑frequency and high‑voltage circuit designs.
Can the sheet be cut to custom dimensions?
While the stock size is 4.5 × 4.5 inches, COORSTEK offers precision cutting services to meet custom length and width requirements, provided the requested dimensions stay within the material’s tolerance limits.
What is the typical breakage strength of this ceramic sheet?
The sheet exhibits a flexural strength of approximately 300 MPa, which is comparable to other high‑purity alumina products and ensures reliable performance under mechanical loading.
How does COORSTEK support customers after purchase?
Our after‑sales team provides technical documentation, material data sheets, and troubleshooting assistance. We also offer warranty coverage for material defects and can coordinate replacement or credit in the event of non‑conformity.
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