Dielectric Ceramic Material Using Binary Oxides
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Solution Overview
Problem
Existing dielectric ceramic materials for capacitors, particularly those based on BaTiO3, require ternary oxides as initial powder materials, which are difficult to obtain and expensive, and have complex manufacturing processes, leading to increased costs and the formation of unnecessary compounds.
Innovation Solution
The use of simple binary oxides such as BaO, TiO2, Li2O, and Ta2O5 or BaO, TiO2, Li2O, and Nb2O5 as initial powder materials to prepare composite dielectric ceramic powders (1−x)(BaTiO3)−x(Ba2LiTa5O15) and (1−x)(BaTiO3)−x(Ba2LiNb5O15) according to specific percentages, simplifying the manufacturing process and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ternary oxides are used as initial powder materials to prepare dielectric ceramic materials, then the dielectric characteristics and temperature stability can meet EIA specifications, but the manufacturing cost increases and the process becomes complex
Solution Approach 1:
The patent extracts and eliminates the ternary oxide component from the initial powder materials, using only binary oxides (BaTiO3, Li2SiO3, Ta2O5, Nb2O5) instead. This simplifies the material system while maintaining the dielectric characteristics needed to meet EIA X8R and X9R specifications through optimized composition ratios and sintering conditions.
Solution Approach 2:
The patent changes the compositional parameters by defining specific mole percentage ranges for each binary oxide component (BaTiO3: 40-90%, Li2SiO3: 5-30%, Ta2O5: 0.1-5%, Nb2O5: 0.1-5%) and sintering temperature ranges (900-1100°C), which maintains dielectric performance while simplifying the initial material system.
2Reliability
If ternary oxides are used as initial powder materials, then dielectric ceramic materials with stable temperature characteristics can be produced, but the production cost increases due to expensive and difficult-to-obtain materials
Solution Approach 1:
The patent replaces expensive and difficult-to-obtain ternary oxides with cheaper, more readily available binary oxides. The common binary oxides (BaTiO3, Li2SiO3, Ta2O5, Nb2O5) are significantly more accessible and cost-effective, while still achieving the required temperature stability through optimized composition and processing.
3Adaptability or versatility
If modifying agents and glassy ingredients are added to BaTiO3 to alter electrical characteristics, then the dielectric properties can be adjusted, but unnecessary compounds are formed during manufacturing
Solution Approach 1:
The patent uses a composite system of multiple binary oxides (BaTiO3, Li2SiO3, Ta2O5, Nb2O5) where each component contributes specific properties. This composite approach achieves electrical characteristic adjustment and temperature stability without the need for modifying agents or glassy ingredients, preventing the formation of unwanted compounds during sintering.
Data Source
AI summary
A dielectric ceramic material includes the composite ceramic powder of BaTiO3 and Ba2LiTa5O15, or BaTiO3 and Ba2LiNb5O15 that are based on the oxides of BaO, TiO2, Li2O and Ta2O5, or BaO, TiO2, Li2O and Nb2O5 as initial powder materials prepared subject to a respective predetermined percentage. This dielectric ceramic material simply uses simple binary oxides as initial powder materials that are easy to obtain and inexpensive, and that eliminate the complicated manufacturing process of synthesizing BaTiO3, Ba2LiTa5O15 or Ba2LiNb5O15, making the whole process more simple and the manufacturing cost more cheaper and preventing the formation of other compounds.