Multi-Layer Glass Structures via 3D Printing
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Solution Overview
Problem
Current methods for 3D printing glass structures lack a simple and effective method for enhancing strength and damage resistance, particularly for structures with fine features.
Innovation Solution
A method involving the formation of a green body with an inner layer of a first glass composition and an outer layer of a second glass composition, where the second sintering temperature is within a specific range of the first sintering temperature, creating a CTE mismatch to enhance mechanical properties, achieved through 3D printing and subsequent debinding and sintering processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If chemical strengthening (ion exchange) is used to enhance strength, then strength is improved, but process complexity increases
Solution Approach 1:
The patent changes the material composition parameters by incorporating ceramic particles (such as alumina, silica, or zirconia) into the glass matrix at controlled concentrations (5-50 wt%). This compositional modification inherently enhances the mechanical strength and damage resistance of the glass structure without requiring additional chemical strengthening processes, thus resolving the contradiction between improving strength and avoiding increased process complexity
Solution Approach 2:
The patent creates a composite glass-ceramic material system by combining glass matrix with dispersed ceramic particles. This composite structure provides synergistic effects where the ceramic particles reinforce the glass matrix, improving overall strength and damage resistance while maintaining a relatively simple single-step fabrication process, thereby resolving the technical contradiction
2Strength
If multiple glass compositions with different sintering temperatures are used, then mechanical properties are improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by creating regions with different glass compositions and ceramic particle concentrations within the same structure. Different layers or zones can have tailored compositions optimized for specific mechanical properties, while the overall sintering process maintains acceptable precision requirements through the use of overlapping sintering temperature ranges and gradual transitions between compositions
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
This approach results in improved mechanical properties such as strength and damage resistance without additional strengthening processes, demonstrated by a 14-17% increase in hardness value compared to single-layer structures.
Implementation Method 1
debinding and sintering the green body to remove the first and second organic material matrixes
Implementation Method 2
sintering the green body to remove the first and second organic material matrixes and to sinter together the first glass powder and the second glass powder
Implementation Method 3
the first glass composition has a first coefficient of thermal expansion (CTE), the second glass composition has a second CTE, the first CTE is greater than the second CTE by a value within the range of from 5×10−7 to 15×10−7/° K
Data Source
AI summary
A method of producing a glass structure includes forming a green body having an inner layer of a first powder of a first glass composition in a first organic material matrix and an outer layer of a second powder of a second glass composition in a second organic material matrix, the outer layer covering at least two opposing major surfaces or all surfaces of the inner layer, the first glass composition being different from the second glass composition, the first and second powders having respective first and second sintering temperatures, the second sintering temperature being within 0 to 30° C. of the first sintering temperature; and debinding and sintering the green body to remove the organic materials and to sinter together the first and second glass powders to produce a sintered glass structure having an inner layer of the first glass composition and an outer layer of the second glass composition.