TECHGuard 4170P | 4N Purity Irregular Alumina

The TECHGuard line is specifically designed for applications where materials are pushed to their limits. High and low temperature variations, high mechanical strength, and no room for failure. With its 4N-level purity and controlled formats, it supports dense, stable, and defect-resistant parts across spray coatings, ceramics, and structural applications

How is TECHGuard used in Aerospace Applications?

High-purity alumina is used in thermal barrier coatings, wear-resistant ceramic parts, and structural components exposed to extreme heat and pressure. It supports durability and consistency in mission-critical environments. The alumina powder has tight particle size control, low impurity levels, and strong sintering behavior. These properties support clean spray deposition and stable microstructures under thermal cycling.

What documentation is available for aerospace validation?

Polar provides full quality assurance reports, including particle size data, elemental analysis, and batch traceability. This supports customer audits and material validation for regulated programs.

How is TECHGuard used as a coating?

High-purity alumina can be used in thermal barrier coatings and alumina ceramic coatings for high-temperature environments. 

High purity alumina can come in either spherical or irregular shapes. Spherical particles are smooth and uniform, offering excellent flow, easy dispersion, and consistent packing. Irregular particles are angular and jagged, providing better mechanical interlocking and abrasion. Spherical morphology is ideal for coatings or pastes, while irregular morphology is ideal for structural ceramics or abrasives.

Can I request a customized particle size?

Yes. Standard distributions and customized sizing is available, including submicron options, to align with your coating or forming process. Our team can match existing specs or develop a tailored grade with full documentation.

How is TECHGuard used in Medical Applications?

TECHGuard High purity alumina is used in medical ceramics that meet stringent performance and compatibility standards. It supports applications where stability is essential, including implantable housings, surgical tools, and diagnostic equipment.

What format of HPA should I use for coating applications?

Powder formats are primarily tailored for coating feedstocks. These are designed for high flowability and predictable deposition, with purity levels up to 5N depending on the application.

TECHGuard 4170P is crucial in advanced battery technologies, especially for enhancing thermal management and safety in battery systems. One of its primary applications is in lithium-ion batteries (LiBs), where it serves as a coating for the battery separator, which lies between the cathode and anode. By coating the separator with TECHGuard 4170P, thermal shrinkage is significantly reduced, preventing potential short circuits that could compromise the battery’s safety. Additionally, the coating helps inhibit dendrite growth, which can adversely affect lithium-ion transport, further enhancing the battery's performance and longevity.

4170P is also highly compatible with various coating processes. Its uniform particle size and spherical shape allow for easy dispersion into different matrices, forming stable suspensions essential for creating smooth, defect-free coatings. This makes it particularly advantageous for applications like LED phosphor coatings or protective layers in electronic devices, where surface consistency and uniformity are critical for optimal performance.

Note: Alumina coated battery separator prevent thermal shrinkage during high temperature operations. 
Reference: Research Study: Preparation of a high-purity ultrafine α-Al2O3 powder and characterization of an Al2O3-coated PE separator for lithium-ion batteries by Dong-Won Lee, Sang-Hun Lee, Yong-Nam Kim, and Jong-Min Oh

TECHGuard 4120P is especially engineered for high-performance aerospace ceramics and components.

In aerospace and industrial ceramics, high purity alumina is often used as a refractory material, capable of withstanding extreme temperatures with minimal contamination. Its excellent thermal shock resistance makes it ideal for furnace linings, high-temperature tooling, and components exposed to rapid temperature changes. Additionally, alumina’s hardness and wear resistance make it suitable as grinding media in the preparation of ceramic powders, ensuring consistent particle size and quality in critical aerospace manufacturing processes.

TECHGuard 4120P is especially engineered for high-quality and biocompatible medical components.

Producing ultra-high-purity alumina for medical ceramics is uniquely demanding. Materials must be ultra-pure to avoid trace contaminants like Fe or Na that can cause inflammatory reactions or device failure. At the same time, they must offer high strength and wear resistance, with tight control of particle size and morphology to ensure dense, defect-free ceramics. Add the need for regulatory compliance—with full traceability and qualification to standards like ISO 13485—and it becomes clear: medical-grade ultra-high-purity alumina requires precision across purity, performance, and documentation