Magnesium Silicate Suspension for Thin Film Phosphors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current phosphor materials for luminescence and electronics applications lack specific particle size characteristics, particularly submicronic sizes, which are necessary for the development of thin, transparent, and efficient luminescent films in new display and lighting technologies.
Innovation Solution
A suspension of magnesium silicate particles with a mean size between 0.1 μm and 1.0 μm, doped with elements like europium and manganese, is produced using a process involving spray-drying and calcination, followed by wet milling in an organic solvent, to achieve stable submicronic particles suitable for these applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional phosphor materials are used, then luminescence properties are achieved, but particle size characteristics are insufficient for thin film applications
Solution Approach 1:
The phosphor material is divided into submicronic particles with sizes between 0.1-1.0 μm, creating fine-grained segments that can be suspended and applied in thin film form while maintaining luminescence properties
Solution Approach 2:
The particle size parameter is changed from conventional larger sizes to submicronic dimensions (0.1-1.0 μm), and the physical state is changed from solid powder to suspension form, enabling new applications in thin film technologies
2Manufacturing precision
If phosphor particles are reduced to submicronic size, then suitability for thin film applications is improved, but manufacturing complexity increases
Solution Approach 1:
The phosphor particles are pre-synthesized with controlled submicronic sizes and then suspended in liquid vehicles before application, separating the size control step from the application step and simplifying the overall manufacturing process
Solution Approach 2:
A liquid suspension medium acts as an intermediary carrier, allowing the fine phosphor particles to be transported and applied uniformly without requiring complex handling procedures for the fine powder itself
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 resulting silicate suspension provides stable, submicronic particles with narrow size distribution, maintaining luminescent properties and facilitating their use in plasma systems, LEDs, and mercury vapor lamps, enabling efficient implementation in advanced display and lighting technologies.
Implementation Method 1
it is characterized in that it is in the form of a suspension of solid crystallized particles in a liquid phase
Implementation Method 2
a process involving spray-drying and calcination
Implementation Method 3
a process involving spray-drying and calcination
Data Source
AI summary
The silicate of magnesium and of barium, strontium or calcium of the invention is characterized in that it is in the form of a suspension of solid crystallized particles in a liquid phase, said particles having a mean size between 0.1 μm and 1 μm. It is prepared by spray-drying a liquid mixture comprising compounds of magnesium, of silicium and of at least one first element chosen from barium, strontium and calcium, by submitting the dried mixture to a first calcination in air and to a second calcination in a reducing atmosphere and by wet milling the calcined mixture.