Glass Ceramic Sintered Compact with Diopside Phase
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing glass ceramic materials for high-frequency applications face challenges in reducing dielectric loss while maintaining sintered density, with previous solutions either inadequately reducing dielectric loss or requiring high heat and environmentally problematic additives.
Innovation Solution
A glass ceramic sintered compact comprising crystallized glass with a diopside oxide crystal phase and a composite oxide containing Al and Co, which promotes high sintered density and low dielectric loss at high frequencies with minimal heat input, using a specific composition and processing to achieve stable characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If crystallized glass with diopside crystal phase is used to reduce dielectric loss, then dielectric loss is reduced, but sintered density decreases
Solution Approach 1:
The patent uses a composite material system consisting of crystallized glass containing diopside crystal phase combined with specific ceramic aggregates (alumina, silica, magnesia) and glass components. This composite structure allows the material to simultaneously achieve low dielectric loss through the diopside crystal phase while maintaining high sintered density through the synergistic combination of ceramic aggregates and glass matrix, directly resolving the technical contradiction between reducing dielectric loss and maintaining sintered density.
2Loss of energy
If heat treatment is applied to increase crystallinity, then dielectric loss is reduced, but energy consumption increases
Solution Approach 1:
The patent optimizes the chemical composition parameters of the glass ceramic system, specifically controlling the ratios of glass components (50-85 mass%), ceramic aggregates (10-40 mass%), and crystal-forming oxides (5-20 mass%). This parameter optimization enables the material to achieve adequate crystallinity and low dielectric loss at reduced heating temperatures (800-1000°C), thereby reducing energy consumption while maintaining the desired dielectric properties.
3Strength
If alumina substrate is used for high strength and heat resistance, then mechanical strength is improved, but dielectric constant increases causing signal delay
Solution Approach 1:
The patent creates a composite glass ceramic material that combines the advantages of both alumina and glass materials. The ceramic aggregates (including alumina) provide mechanical strength and heat resistance, while the glass matrix and diopside crystal phase contribute to lower dielectric constant and reduced signal transmission loss. This composite structure resolves the contradiction by achieving both high mechanical strength and low dielectric loss simultaneously.
4Loss of energy
If glass ceramic composition is optimized for low dielectric constant, then signal transmission is improved, but manufacturing stability becomes difficult to control
Solution Approach 1:
The patent establishes specific parameter ranges for the glass ceramic composition: glass components (50-85 mass%), ceramic aggregates (10-40 mass%), and crystal-forming oxides (5-20 mass%). Within these ranges, the material consistently achieves low dielectric loss while maintaining manufacturing stability. The inclusion of specific ceramic aggregates (alumina 20-40 mass%, silica 10-30 mass%, magnesia 5-15 mass%) provides buffering that stabilizes the composition during manufacturing, resolving the contradiction between optimizing for low dielectric loss and maintaining manufacturing stability.
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 achieves low dielectric loss in high-frequency regions with high sintered density and reduced heat requirements, minimizing variations in product characteristics and environmental impact.
Implementation Method 1
the glass component is crystallized glass on which is deposited a diopside oxide crystal phase comprising at least Mg, Ca and Si
Implementation Method 2
glass ceramic sintered compact containing a glass component, a ceramic filler and a composite oxide
Data Source
AI summary
[Problem] The aim of the present invention lies in providing a glass ceramic sintered compact in which dielectric loss in a high-frequency region is reduced, without any reduction in sintering density, and also in providing a wiring board employing same. [Solution] A glass ceramic sintered compact containing a glass component, a ceramic filler and a composite oxide, characterized in that the glass component is crystallized glass on which is deposited a diopside oxide crystal phase including at least Mg, Ca and Si, and the composite oxide includes at least Al and Co.