Method for Reinforcing Transparent Ceramics, and Ceramic

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This patent describes a method for reinforcing transparent ceramic materials by creating a surface region with a lower thermal expansion coefficient than the rest of the component. This is achieved either by applying a compatible transparent coating or forming a stoichiometric gradient during production. After thermal treatment and cooling, compressive stresses build up in these surface regions, significantly improving the ceramic’s fracture toughness without compromising transparency.

Use CasesContent extracted from patent full text and abstract with AI.

• Bulletproof and protective glass for vehicles and buildings
• Optical windows and domes in high-stress environments (e.g., aerospace, military sensors)
• Wear-resistant, transparent coverings for electronic displays and touch screens
• Medical devices requiring transparent, strong ceramics (e.g., dental restorations, implants)
• Transparent armor and shields in defense applications
• High-performance optical components such as lenses and prisms
• Lasers and photonic devices with robust transparent ceramics

BenefitsContent extracted from patent full text and abstract with AI.

• Significantly improved fracture toughness and resistance to cracking compared to traditional transparent ceramics
• Enhanced safety and durability for transparent ceramic components used in demanding environments
• Maintains high optical transparency, allowing use in applications that require clear visibility
• Compressive surface stresses reduce the likelihood of catastrophic failure from impacts
• Versatility in manufacturing through coating or compositional gradient approaches
• Potential for thinner, lighter components due to increased strength
• Surface modifications do not compromise bulk material properties or optical clarity

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention concerns the area of ceramic and relates to transparent composite components which have an increased load-bearing capacity. The aim of the invention consists in providing a transparent ceramic component which overcomes previous disadvantages relating to fracture toughness. This is achieved by a method for producing a transparent ceramic composite, wherein at least one planar transparent region is formed near the surface, said region having a lower thermal expansion coefficient than the rest of the component so that compressive stresses are generated in the region near the surface after a thermal treatment and a cooling process. The region(s) near the surface can be produced either by the arrangement of a separate coating or directly during production by a corresponding stoichiometric gradient.