Sealed Porous Ceramic Substrates for Moisture-Resistant RF Use
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Solution Overview
Problem
Ceramic materials used in outdoor environments are prone to moisture infiltration due to their porous structure, which affects their structural integrity and electrical properties, especially in applications like effectors and aerospace components.
Innovation Solution
A sealant infiltrator, such as sodium silicate, is used to fill the pores of ceramic substrates under negative pressure, transforming them into a moisture-resistant structure that maintains electrical signal transmission capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ceramic substrate porosity is increased to achieve desired dielectric constant, then electrical insulation properties are improved, but moisture resistance deteriorates
Solution Approach 1:
The patent utilizes the porous structure of ceramic substrates to achieve desired dielectric constants while applying sealant infiltrators to address the moisture resistance issue. The porous structure is maintained for electrical insulation while being protected from moisture through sealant application.
Solution Approach 2:
The patent creates a composite structure by infiltrating sealant into the porous ceramic substrate. This composite approach combines the electrical insulation properties of porous ceramic with the moisture resistance of sealant materials, resolving the contradiction between porosity benefits and moisture vulnerability.
2Object-affected harmful factors
If sealant is applied to ceramic surface to prevent moisture absorption, then moisture resistance is improved, but radio frequency transmission capability deteriorates
Solution Approach 1:
The patent applies sealant infiltrator locally to the porous structure of the ceramic substrate rather than coating the entire surface. This localized application protects the porous interior from moisture while maintaining the exterior surface properties necessary for radio frequency transmission.
Solution Approach 2:
The patent carefully manages the porous structure by using sealant infiltrator to protect only the internal pores from moisture, while preserving the external surface characteristics that enable radio frequency transmission. The porous structure itself is not eliminated but selectively protected.
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 sealed ceramic materials exhibit improved resistance to moisture and high temperatures while retaining radio frequency transmissibility, making them suitable for effector components and aerospace applications.
Implementation Method 1
the ceramic substrate is submitted to a low-pressure environment to promote penetration of the sealant infiltrator
Implementation Method 2
the sealant infiltrator that fills a majority of a plurality of pores
Data Source
AI summary
A ceramic substrate including a porous internal structure including a sealant infiltrator. The sealant infiltrator includes sodium and silicate. The sealant infiltrator infiltrates at least some of the plurality of pores and closes the plurality of pores filled with the sealant infiltrator when exposed to a negative pressure. The sealant infiltrator is distributed across the exterior surface of the ceramic substrate.