SiO2 Diffuse Reflector Layer for Quartz Glass
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Solution Overview
Problem
Existing reflector layers, particularly those made of gold, are expensive and have limited resistance to temperature variations, making them unsuitable for applications requiring chemical and thermal resistance in lamp and reflector production.
Innovation Solution
A quartz glass component with a SiO2 cover layer acting as a diffuse reflector, which is chemically and thermally resistant, and can be produced at lower costs, using a method involving a slip containing amorphous SiO2 particles applied to the base body, dried, and then vitrified to form a dense and crack-free layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a gold reflector layer is used, then reflectivity is improved, but cost increases and thermal resistance deteriorates
Solution Approach 1:
The patent replaces expensive gold reflector layers with a cost-effective alternative: a white paint layer containing TiO2 particles. This principle substitutes a cheap, readily available material (white paint with TiO2) for an expensive material (gold), achieving adequate reflectivity without the high cost and thermal sensitivity of gold. The white paint layer provides sufficient reflective performance for the application while being thermally more stable and economically advantageous.
2Illumination intensity
If a gold reflector layer is used, then reflectivity is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive gold reflector layers with a cost-effective alternative: a white paint layer containing TiO2 particles. This principle substitutes a cheap, readily available material (white paint with TiO2) for an expensive material (gold), achieving adequate reflectivity without the high cost and thermal sensitivity of gold. The white paint layer provides sufficient reflective performance for the application while being thermally more stable and economically advantageous.
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 SiO2 cover layer provides adequate reflectivity, high chemical and thermal resistance, and mechanical strength, while being cost-effective, and can withstand high temperatures, making it a suitable alternative to gold reflectors.
Implementation Method 1
an SiO2 cover layer, or reflector layer, which acts as a diffuse reflector and consists of at least partly opaque quartz glass
Implementation Method 2
A suitable procedure will be explained in more detail further below. The surface of the base body which is provided as the reflector has applied thereto a layer of a slip containing SiO2 particles, from which the SiO2 cover layer is obtained by subsequent drying and vitrification
Implementation Method 3
from which the SiO2 cover layer is obtained by subsequent drying and vitrification
Data Source
AI summary
In a known component having a reflector layer, the surface of a base body of quartz glass is covered at least in part with a reflector layer. Starting from this, to provide a component, particularly for use in lamp and reflector manufacture, which is equipped with an efficient, chemically and thermally resistant and, nevertheless, inexpensive reflector layer, it is suggested according to the invention that an SiO2 cover layer should be provided which acts as a diffuse reflector and consists of at least partly opaque quartz glass.