Glass Flake Composition for Heat and Acid Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing glass flakes used in resin compositions, paint, and cosmetics have insufficient heat resistance and chemical durability due to imbalanced compositions of silicon dioxide, aluminum oxide, and alkali metal oxides, leading to issues with uniform thickness and acid resistance.
Innovation Solution
A glass flake composition with specific ranges of silicon dioxide (60-75%), aluminum oxide (5-15%), calcium oxide (3-20%), and alkali metal oxides (9-20%), along with controlled working temperatures (1180-1300°C), to enhance heat resistance, chemical durability, and formability, while maintaining suitable devitrification and viscosity properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the working temperature is increased to improve formability, then the glass flakes become easier to form, but the thermal damage to kiln or fabrication apparatus increases and fuel cost increases
Solution Approach 1:
The patent modifies the chemical composition parameters of the glass base material by controlling the content ranges of silicon dioxide (60-75%), aluminum oxide (5-15%), and other oxides. This composition optimization enables the glass to achieve appropriate viscosity and formability at lower working temperatures (1180-1300°C), thereby reducing fuel consumption and thermal damage to equipment while maintaining manufacturing ease
2Object-affected harmful factors
If the content of silicon dioxide is increased to improve acid resistance, then acid resistance is improved, but the devitrification temperature increases and heat resistance decreases
Solution Approach 1:
The patent optimizes the silicon dioxide content within a specific range (60-75%) rather than maximizing it. This balanced composition, combined with controlled aluminum oxide (5-15%) and other oxide contents, achieves adequate acid resistance while preventing excessive devitrification temperature increase, thereby maintaining heat resistance for high-temperature applications
Solution Approach 2:
The patent creates a composite glass composition by carefully balancing multiple oxide components (silicon dioxide, aluminum oxide, calcium oxide, sodium oxide, potassium oxide, magnesium oxide). This multi-component system achieves synergistic effects where the combination of materials provides both acid resistance and heat resistance that individual components cannot achieve alone
3Ease of manufacture
If the content of aluminum oxide is increased to improve formability, then formability is improved, but acid resistance decreases
Solution Approach 1:
The patent controls aluminum oxide content within a balanced range (5-15%) rather than maximizing it. This moderate aluminum oxide content, combined with optimized silicon dioxide (60-75%) and other oxide proportions, achieves satisfactory formability while limiting the negative impact on acid resistance through compositional balance
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 proposed glass flake composition achieves improved heat resistance, acid resistance, and uniform thickness, making them suitable for high-temperature applications and acidic environments, and allows for the production of glass flakes with enhanced chemical durability and formability.
Implementation Method 1
a glass base material having a composition expressed in percent by mass... a working temperature for the glass base material is 1180°C to 1300°C
Implementation Method 2
the devitrification temperature is the temperature at which crystals form and start to grow in the molten glass base material
Implementation Method 3
the surfaces of the glass flakes may be coated by a metal oxide to produce an interference color resulting from interference of reflection light
Implementation Method 4
produce an interference color resulting from interference of reflection light
Data Source
Figure 1(a)~1(b)
Figure 2~3
Figure 4
AI summary
A scale-like glass (10) having improved heat resistance and chemical resistance is formed from a glass base material satisfying, in mass%, 60≤SiO2≤75, 5<Al2O3≤15, 3≤CaO≤20, 6≤Na2O≤20 and 9≤(Li2O+Na2O+K2O)≤13. When 9≤(Li2O+Na2O+K2O)≤13 is satisfied in mass%, the CaO content and the Na2O content are preferably set within the ranges of 5≤CaO≤20 and 6≤Na2O≤13, respectively. When 13≤(Li2O+Na2O+K2O)≤20 is satisfied in mass%, the CaO content and the Na20 content are preferably set within the ranges of 3≤CaO≤15 and 9≤5Na2O≤2O, respectively. The working temperature of the glass base material is preferably 1180°C-1300°C. The temperature difference ΔT obtained by taking the devitrification temperature of the glass base material from the working temperature of the glass base material is preferably 0°C-200°C. The glass transition temperature of the glass base material is preferably 550°C-700°C. The acid resistance index ΔW of the glass base material is preferably 0.05-1.5 mass%.