Heat-insulating material, production method and use thereof

Simple SummaryContent extracted from patent full text and abstract with AI.

This patent discloses a novel heat-insulating material designed for use at very high temperatures, particularly above 1150°C, such as in gas turbines or aircraft engines. The material consists of a specific combination of rare earth metal oxides (like lanthanum, neodymium, or gadolinium), lithium oxide, and transition metal oxides (like aluminum, gallium, or iron), crystallized in a magnetoplumbite structure with added lithium for improved performance. The invention also describes the manufacturing process and its use for thermal barrier coatings.

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

• Thermal barrier coatings for turbine blades in power plants or jet engines
• Protective coatings for components exposed to extreme heat cycles
• Ceramic foams or bulk materials for industrial furnaces and reactors
• Protective layers in high-temperature fuel cells or other energy devices
• Coatings in process industries requiring thermal insulation under severe conditions

BenefitsContent extracted from patent full text and abstract with AI.

• Enhanced long-term stability at temperatures exceeding 1150°C, surpassing traditional zirconia-based materials
• Reduced risk of coating delamination and cracking due to improved stress tolerance from lithium doping
• Higher resistance to thermal cycling and oxidation, leading to extended service life
• Enables thinner, lighter, and more effective insulating layers
• Greater flexibility in manufacturing methods, suitable for both coatings and bulk ceramics
• Potential for improved compatibility with metal substrates and existing barrier materials like YSZ (yttria-stabilized zirconia)

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

A heat-insulating material has a first phase with the stoichiometric composition of 0.1 to 10 mol-% M12O3, 0.1 to 10 mol-% Li2O, and as the remainder M22O3 with possible impurities. M1 is selected from the elements lanthanum, neodymium, gadolinium, or a mixture thereof, and M2 is selected from the elements aluminum, gallium, iron, or a mixture thereof. The first phase is present in a magnetoplumbite structure.