Ceramic Heater Mixed-Material Layer for High-Frequency Noise Suppression
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Solution Overview
Problem
Ceramic heaters generate high-frequency noise that can adversely affect surrounding electronic devices due to the radiation of high-frequency components from the heat-generating resistor.
Innovation Solution
A ceramic heater design incorporating a ceramic base body with a heat-generating resistor and a mixed-material layer formed of a mixture of ceramic and metal materials, which attenuates the high-frequency noise radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a heat-generating resistor is used to generate heat in the ceramic heater, then heating performance is improved, but high-frequency noise radiation increases and adversely affects surrounding electronic devices
Solution Approach 1:
A mixed-material layer comprising metal particles dispersed in a ceramic matrix is introduced as an intermediary between the heat-generating resistor and the surrounding environment. This layer acts as a shield that absorbs and attenuates high-frequency electromagnetic noise while allowing thermal energy to pass through, thus protecting surrounding electronic devices from noise interference without compromising heating performance
Solution Approach 2:
The patent employs a composite mixed-material layer combining metal particles (such as tungsten, molybdenum, or rhenium) with ceramic matrix materials. The metal particles provide electromagnetic shielding properties to attenuate high-frequency noise, while the ceramic matrix maintains thermal conductivity and structural integrity, achieving both noise suppression and heating functionality
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 mixed-material layer effectively suppresses high-frequency noise radiation, reducing adverse effects on electronic devices and improving the uniformity of surface temperature distribution.
Implementation Method 1
The heat-generating resistor, which is formed in a linear shape or a plate-like shape, generates Joule heat by the passage of electric current therethrough
Implementation Method 2
radiation of a high-frequency component generated by the passage of electric current through the heat-generating resistor is suppressed by the mixed-material layer
Data Source
AI summary
A ceramic base body, which is a ceramic heater which suppresses noise radiation and thus has little adverse effect on surrounding electronic devices, includes a plurality of ceramic layers, and a mixed-material layer disposed between two ceramic layers, the mixed-material layer being formed of a mixture of a ceramic material and a metal material. Between the ceramic layer and the mixed-material layer, a heat-generating resistor which generates heat by a passage of electric current therethrough is disposed. Radiation of a high-frequency component generated by the passage of electric current through the heat-generating resistor is suppressed by the mixed-material layer, wherefore the adverse effect of the radiation on surrounding electronic devices can be reduced.