Hollow-Particle Ceramic Panels for Lightweight Thermal Insulation
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Solution Overview
Problem
Conventional insulating ceramic panels are costly and heavy, limiting their applications, and are difficult to fabricate with complex, arcuate, and/or nonlinear surface profiles and internal features.
Innovation Solution
The development of insulating ceramic panels using hollow particles and an oxide binder, which are formed through a 3-D printing process, allowing for the creation of lightweight panels with complex shapes and features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional insulating ceramic panels are used, then thermal insulation performance is achieved, but cost and weight increase
Solution Approach 1:
The patent employs hollow particles with controlled wall thickness (3-30% of equivalent diameter) to create a porous structure that provides thermal insulation while reducing density. The hollow particles are distributed throughout the ceramic matrix to achieve the desired balance between insulation performance and weight reduction.
Solution Approach 2:
The invention creates a composite material system combining ceramic matrix with hollow particles of different materials (metal oxides, ceramics, or composites). This composite approach allows optimization of both thermal insulation properties and weight, as the hollow particles can be selected for specific thermal and mechanical characteristics.
2Reliability
If conventional insulating ceramic panels are used, then thermal insulation performance is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The hollow particles are pre-formed and pre-sorted by size (equivalent diameter 10-500 μm) before being incorporated into the ceramic matrix. This preliminary preparation simplifies the overall manufacturing process by avoiding complex in-process modifications and enabling better control over particle distribution and orientation.
Solution Approach 2:
The patent controls key parameters including hollow particle size (10-500 μm equivalent diameter), wall thickness (3-30% of equivalent diameter), and concentration in the matrix. By optimizing these parameters, the invention achieves good thermal insulation performance while maintaining manufacturability through standard ceramic processing techniques.
3Reliability
If conventional insulating ceramic panels are used, then thermal insulation is provided, but complex surface profiles and internal features cannot be fabricated
Solution Approach 1:
The ceramic panel is segmented into multiple layers during fabrication, with each layer containing hollow particles oriented or distributed to provide specific functional characteristics. This segmentation enables the creation of complex surface profiles and internal features while maintaining thermal insulation performance through controlled particle arrangement.
Solution Approach 2:
The invention utilizes three-dimensional distribution and orientation of hollow particles within the ceramic matrix to achieve complex surface profiles and internal features. By controlling particle arrangement in multiple dimensions rather than just single-plane patterning, the patent enables fabrication of arcuate, nonlinear, and other complex geometries.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The panels are cheaper to produce, lighter in weight, and can be fabricated with intricate designs, providing improved thermal resistance and durability while maintaining low thermal conductivity.
Implementation Method 1
an oxide binder material that attaches each hollow particle to at least one other hollow particle
Implementation Method 2
Insulating ceramic panels are utilized in a variety of applications, including within the aerospace industry
Data Source
AI summary
Insulating ceramic panels and methods of forming insulating ceramic panels. The insulating ceramic panels include a plurality of hollow particles and an oxide binder. The plurality of hollow particles are formed from a hollow particle material that includes a metal oxide. The plurality of hollow particles defines an average equivalent particle diameter of at least 10 micrometers (µm) and at most 500 µm. In addition, the plurality of hollow particles defines an average wall thickness that is at least 3% and at most 30% of the average equivalent particle diameter. The oxide binder material attaches each hollow particle to at least one other hollow particle and differs from the hollow particle material. The insulating ceramic panels define a particle-enclosed void volume fraction, which is enclosed within the plurality of hollow particles, and an interstitial void volume fraction, which is defined within an interstitial space among the plurality of hollow particles.