8505.11.00.30 - Ceramic

This HTS subcategory, 8505.11.00.30, specifically classifies permanent magnets and articles intended to become permanent magnets after magnetization that are made of ceramic materials. Ceramic magnets, often referred to as ferrite magnets, are composed of ferritic compounds, typically iron oxides mixed with other elements like strontium or barium. They are known for their cost-effectiveness, good corrosion resistance, and ability to retain magnetism well at elevated temperatures.

This classification is distinct from its siblings which cover other primary material compositions for permanent magnets. For instance, 8505.11.00.10 pertains to Alnico magnets, which are alloys of aluminum, nickel, and cobalt. Sibling categories 8505.11.00.50 and 8505.11.00.70 are reserved for sintered samarium-cobalt and sintered neodymium-iron-boron magnets, respectively, both of which are rare-earth magnetic materials with superior magnetic strength. The "Other" category, 8505.11.00.90, serves as a residual classification for any permanent magnets of metal not otherwise specified.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Classification within this specific code is therefore determined by the explicit criteria of being a permanent magnet (or article intended to become one) and being constructed from ceramic materials, differentiating it from metallic permanent magnets and other ceramic permanent magnets covered by different codes.