Bismuth Oxide Ceramic Vaporization Core Thermal Shock
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Solution Overview
Problem
Existing ceramic vaporization cores face issues with narrow firing range and poor thermal shock resistance due to modification layers containing lead-containing oxides.
Innovation Solution
A ceramic vaporization core with a bismuth-based oxide modification layer, comprising bismuth trioxide and other components like zinc, sodium, and magnesium, which replaces lead-containing oxides, improving thermal stability and expanding the firing range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If lead-containing oxides are used in the modification layer, then bonding force between heating element and ceramic base is enhanced, but thermal shock resistance is poor and firing range is narrow
Solution Approach 1:
The patent changes the chemical composition parameters of the modification layer by replacing lead-containing oxides with bismuth-based oxides. This parameter change maintains the bonding function while improving thermal shock resistance and expanding the firing range, as bismuth-based oxides have different thermal expansion characteristics and melting points compared to lead-based oxides.
Solution Approach 2:
The patent uses composite materials by combining bismuth-based oxide with other ceramic components in the modification layer. This composite structure achieves both strong bonding to the heating element and improved thermal shock resistance, as the composite material leverages the complementary properties of different ceramic components.
2Strength
If lead-containing oxides are used in the modification layer, then bonding force is enhanced, but firing range is narrow
Solution Approach 1:
The patent changes the chemical composition by substituting lead-containing oxides with bismuth-based oxides, which have different melting points and thermal stability characteristics. This parameter change allows the modification layer to maintain bonding strength while accommodating a broader temperature range for firing, thus expanding the firing range.
3Reliability
If bismuth-based oxide is used in the modification layer, then thermal shock resistance is improved and firing range is expanded, but manufacturing complexity increases
Solution Approach 1:
The patent changes the composition parameters to use bismuth-based oxide, which requires adjustments in the manufacturing process such as controlling sintering temperature and time. However, these parameter changes enable the achievement of improved thermal shock resistance and expanded firing range, making the increased manufacturing complexity acceptable for the performance gains.
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 bismuth-based oxide modification layer enhances thermal shock resistance, lowers the melting temperature, and improves bonding with the ceramic base, resulting in better thermal stability and vaporization performance.
Implementation Method 1
the melting temperature of the modification layer is lowered
Implementation Method 2
the thermal shock resistance of the modification layer is improved
Implementation Method 3
the thermal expansion coefficient of the modification layer is lowered
Implementation Method 4
improves bonding with the ceramic base
Data Source
AI summary
A ceramic includes: a ceramic base; and a modification layer arranged on a surface of the ceramic base. The modification layer includes a bismuth-based oxide and other components. In an embodiment, the ceramic base includes a porous ceramic. In an embodiment, the bismuth-based oxide includes bismuth trioxide. In an embodiment, a mass percentage of bismuth in the modification layer is 50% to 80%.