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Spherical Alumina - Process, Spherical Alumina - Compound/Ingredients,…
Spherical Alumina - Process
Denka
Classic calcination and wet chemical routes to produce spherical alumina which are different from flame melting and staged heat treatment
Method of producing ultrafine spherical alumina that can improve the flow and film formation of the final products
The change in process conditions or feed selection or washing helps in reducing ionic impurity or soda cluster of the spherical alumina
Flame melting of alumina feed followed by controlled cooling and post-heat steps to increase α-phase and sphericity
Bestry
Precursor surface modification followed by flame spheroidization to produce ultrafine spherical alumina powders with narrower particle size distribution and improved dispersibility
Methods to reduce impurities and radioactive elements in spherical alumina by selecting purified feedstock’s or applying post-treatments
Two-step high-temperature process where spherical alumina is first formed by melt-spheroidization and then re-calcined to achieve complete α-phase transformation
Modifying the surface of spherical alumina through coatings, composite architectures or particle adhesion to improve interfacial compatibility and packing density
Producing granules or coarse feed followed by flame-melt to form large spherical alumina can be used as thermal fillers in various applications
Nippon
Controlled heat treatment or raw-material selection can minimize surface alkali and ionic contaminants in spherical alumina with reliable humidity performance
The flame spheroidization or high-temperature pellet melting produce alumina with proper spherical geometry and improved flowability
Two-stage or multi-stage thermal processes like initial spheroidization step followed by a controlled high-temperature conversion to alumina will produce spherical particles which are crystalline and thermally stable
Spherical Alumina - Compound/Ingredients
Denka
Spherical alumina with α-phase crystallinity provides high thermal conductivity, mechanical strength, and phase stability
High purity spherical alumina with reduced sodium, chlorine or radioactive elements is suitable for semiconductors and high-reliability electronics
Optimizing spherical alumina size and shape, from ultrafine submicron spheres to large particles will be useful for filler applications
Modified spherical alumina improves dispersion in polymers and enhancing interfacial adhesion and thermal conductivity
Sumitomo
Producing spherical alumina with tight size distributions and high sphericity will enhance powder flowability and packing in composites
Thermally stable alumina with improved conductivity is achieved by phase transformation of spherical alumina
Spherical alumina tailored for high-performance fillers in TIMs, encapsulants, or heat-dissipating composites
Nippon
Optimized heating/cooling preserve spherical integrity for high-temperature applications
Spherical alumina is used for producing emerging high-power devices, EV electronics or 5G/6G systems with aligning particle specifications
Modifying particle shape, roundness index, and surface smoothness maximize packing density in thermal composites
Spherical Alumina - Compositions
Shin Etsu
Coated or functionalized-alumina compositions for improved polymer compatibility to produce superior dispersion, bond strength or thermal pathways in the cured composition
Combination of spherical alumina with nanoscale alumina or other nanoscale particulates to create optimized packing in the cured composition
Curable resin compositions with low-ion spherical alumina to meet electrical reliability
Resin or coating compositions where spherical alumina is used to achieve high dielectric strength and controlled permittivity for power electronics
Thermally-conductive polymer/epoxy compositions use spherical alumina as the principal thermally conductive filler
Adhesive compositions that include spherical alumina as a thermally conductive, electrically insulating phase to protect circuitry while aiding heat flow
Sumitomo
Resin compositions that incorporate low sodium or low-ionic spherical alumina to avoid curing inhibition and improve dielectric reliability
Spherical alumina with dispersants or rheology modifiers to produce printable formulations for die-attach, TIMs or thermal pastes
Formulations using spherical alumina as a main thermally conductive filler with improved heat dissipation and processable viscosity
Adhesives combining spherical alumina with polymer matrices to optimize thermal pathways while maintaining adhesive properties
Denka
High-purity filler for formulations targeting electronics or dielectric applications
Functionalized fillers in formulations will improve composite properties such as mechanical strength and adhesion
Polymer, epoxy or resin compositions containing spherical alumina as the primary thermally conductive filler with optimized filler loading for thermal management
Combine spherical alumina with binders will meet dielectric, insulation and thermal performance simultaneously
Spherical Alumina - Applications
Sumitomo
Spherical alumina used in potting or encapsulation resins
Spherical alumina used in adhesives for broader applications
Thermal Grease / TIMs / Heat Dissipation Pastes
Used as filler in epoxies or polymeric resins
Denka
Spherical alumina applied in adhesives or die-attach compositions
Spherical alumina is used in polymer or resin matrices
Spherical alumina is used to improve thermal conductivity in pastes or greases for electronic or power applications
Shin Etsu
Adhesives or potting materials using spherical alumina to optimize thermal and mechanical performance in electronic assemblies
Spherical alumina functions as a filler in polymeric or epoxy systems
Spherical alumina serves as the thermally conductive filler to enhance heat dissipation in TIMs or greases