What property of high-tech ceramics makes them suitable for watchmaking applications?

High-tech ceramics are particularly suitable for watchmaking applications because of their corrosion resistance. This property ensures that the materials used in watches can withstand exposure to moisture, sweat, and various environmental factors without deteriorating over time. In a watch, components that are resistant to corrosion contribute to the longevity and reliability of the timepiece, maintaining both its aesthetic appeal and functional integrity.

Corrosion resistance is essential for watches, which are often worn daily and exposed to different conditions. Unlike metals, which can oxidize or tarnish, high-tech ceramics maintain their appearance and structural integrity due to their chemically inert nature. This makes them ideal for both the casing and internal components of watches, where durability and maintaining an attractive finish are key considerations.

In contrast, brittleness can lead to fractures under stress, high density does not contribute beneficially to the overall performance of the watch, and radioactivity is not a desirable property in any aspect of watchmaking. Each of these other properties may not enhance the functionality or user experience of a watch as effectively as corrosion resistance does.