Ultraviolet-Shielding Glass Sheet Composition for Vehicle Windows
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing window panes for vehicles and buildings face challenges in achieving effective ultraviolet light shielding without increasing production costs, particularly when glass sheets need to be thin to be lightweight, and existing solutions often require additional coatings.
Innovation Solution
A glass sheet composition with specific weight percentages of SiO2, B2O3, Al2O3, MgO, CaO, Na2O, K2O, T-Fe2O3, TiO2, and CoO, which inherently provides low ultraviolet transmittance and moderate visible transmittance, allowing for effective solar shielding without additional coatings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the glass sheet thickness is reduced to make window panes lightweight, then the weight decreases, but the ultraviolet-shielding ability deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the glass by adding specific amounts of ultraviolet-absorbing components (TiO2: 0.1-5.0 wt%, CeO2: 0.01-1.0 wt%) to the base glass composition. This allows thin glass sheets (1-5 mm) to achieve ultraviolet transmittance of 1.6% or less, resolving the contradiction between reduced thickness/weight and maintained UV-shielding ability.
Solution Approach 2:
The patent creates a composite glass material by combining base glass components (silica, soda, lime) with ultraviolet-absorbing additives (titanium oxide, cerium oxide). This composite composition enables thin glass sheets to possess both lightweight properties and effective ultraviolet shielding, eliminating the need for additional coating layers.
2Object-affected harmful factors
If a coating is formed on the glass sheet to achieve high ultraviolet-shielding ability, then the ultraviolet transmittance decreases to below 1%, but the production cost increases
Solution Approach 1:
The patent merges the ultraviolet-shielding function directly into the glass bulk material by incorporating UV-absorbing components during glass manufacturing. This eliminates the need for separate coating processes and additional materials, thereby reducing production steps and costs while achieving ultraviolet transmittance of 1.6% or less in thin glass sheets.
Solution Approach 2:
The glass composition itself provides the ultraviolet-shielding function through incorporated UV-absorbing components (TiO2, CeO2). The glass material serves its own shielding function without requiring external coatings or additional protective layers, simplifying manufacturing and reducing costs.
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 glass sheet composition effectively blocks solar ultraviolet light transmission while maintaining moderate visible transmittance, providing good solar shielding properties and reducing production costs by eliminating the need for additional coatings.
Implementation Method 1
a technique based on absorption by ferric oxide and absorption by an optionally added ultraviolet-absorbing component such as titanium oxide (TiO2) or cerium oxide (CeO2)
Data Source
AI summary
The present invention provides a glass sheet having a good property of blocking transmission of ultraviolet light, having a low to moderate visible transmittance, being relatively thin, being capable of substantially blocking transmission of solar ultraviolet light, and also having a good solar shielding property. The glass sheet of the present invention has a thickness of 1 to 5 mm, a Tuv 380 of 1.5% or less, a Tuv 400 of 2.5% or less, a visible transmittance (YA) of 5 to 40%, and a solar transmittance (TG) of 5 to 45%, and is formed from a glass composition, wherein the glass composition includes: 1.0 to 5.0 wt % T-Fe2O3; 1.0 to 5.0 wt % TiO2; and 50 to 600 wt. ppm CoO as coloring components in addition to predetermined base composition, a FeO ratio is 5 to 40%, and the sum of T-Fe2O3 multiplied by 2 and TiO2 is 7.0% or more.