Zirconia Ceramic Housing for Radio Wave Transparency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current devices with ceramic housings for radio wave communication in the 800 MHz to 3 GHz range face challenges due to low transparency to radio waves and limited resistance to impacts and scratches, leading to communication issues and aesthetic concerns.
Innovation Solution
A ceramic housing with a specific chemical composition, including 32% to 95% ZrO2, stabilized zirconia, and additional oxides, providing high transparency and resistance through a sintered product with a high crystalline content and controlled grain sizes, ensuring effective radio wave transmission and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If zirconia is used for the housing, then mechanical strength and resistance to impacts and scratches are improved, but radio wave transparency deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the ceramic material by adding specific amounts of MgO (0.1-5 wt%), CaO (0.1-5 wt%), and SiO2 (0.1-5 wt%) to the zirconia base material. These parameter changes modify the crystal structure and density of the ceramic, thereby improving radio wave transparency while maintaining the mechanical strength provided by the zirconia matrix.
Solution Approach 2:
The patent creates a composite ceramic material by combining zirconia with multiple oxide components (MgO, CaO, SiO2, and optionally Y2O3, CeO2, Sc2O3). This composite approach allows the material to exhibit both the mechanical properties of zirconia and the radio wave transparency enhanced by the additional oxides, resolving the contradiction between strength and transparency.
2Reliability
If materials with high radio wave transparency are used, then communication reliability is improved, but resistance to impacts and scratches deteriorates
Solution Approach 1:
The patent optimizes the weight percentage parameters of each component in the ceramic composition. By precisely controlling the ratios of ZrO2 (60-95 wt%), MgO (0.1-5 wt%), CaO (0.1-5 wt%), and SiO2 (0.1-5 wt%), the material achieves a balance where radio wave transparency is maximized while the zirconia matrix maintains sufficient mechanical strength for impact and scratch resistance.
3Adaptability or versatility
If the housing is exposed to the external environment, then device functionality is improved, but mechanical integrity and appearance deteriorate due to impacts and friction
Solution Approach 1:
The patent develops a composite ceramic housing material that combines the durability of zirconia with the transparency-enhancing properties of MgO, CaO, and SiO2. This composite structure provides the mechanical integrity needed to withstand external environmental exposure, including impacts and friction, while maintaining the aesthetic appearance and radio wave transparency required for modern communication devices.
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 solution enhances radio wave transparency while providing superior mechanical properties, ensuring reliable communication and maintaining the device's integrity and appearance in harsh environments.
Implementation Method 1
through which at least a portion of said waves passes during the use of the device
Implementation Method 2
a sintered product comprising, as percentage by weight on the basis of the sintered product
Data Source
AI summary
The invention relates to a communication device using radio waves with frequencies of 800 MHz to 3 GHz, comprising a ceramic cover at least partially exposed to the external environment of the device, at least one portion of said waves passing therethrough during the use of the device, said cover being at least partially made of a sintered product having a chemical composition such as, by weight and for a total of 100%, 32%≦̸ZrO2≦̸95%, 1%<Y2O3+CeO2+Sc2O3+MgO+CaO, 0%≦̸CeO2≦̸26%, 0%≦̸MgO≦̸43%, 0%≦̸CaO≦̸37%, 0%≦̸SiO2≦̸41%, 0%≦̸Al2O3≦̸55%, 0%≦̸TiO2≦̸30%, 0%≦̸lanthanide oxide, except for CeO2≦̸50% 0% SrO≦̸24%, o %≦̸iAlON compounds ≦̸50%, and other compounds ≦̸15%.