Rare Earth Fluorescent Penetrant Composition for Fluorinated Solubility
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Solution Overview
Problem
Existing rare earth complexes used in penetrant inspection have low solubility in fluorine-based solvents, limiting their concentration and emission intensity, making them impractical for use as fluorescent flaw inspection agents.
Innovation Solution
A rare earth complex containing two or more phosphine oxide ligands with different structures and a β-diketone ligand, dissolved in a fluorine-based solvent, achieves high solubility and emission intensity, allowing concentrations up to 0.5-90 mass %.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a rare earth complex is used as a luminescent material, then emission intensity is improved, but solubility in fluorine-based solvents deteriorates
Solution Approach 1:
The patent modifies the chemical structure parameters of the rare earth complex by introducing specific ligands (phosphine oxide and β-diketone) with particular molecular structures and sterics. This changes the solubility parameter of the complex to match the fluorine-based solvent, enabling high concentration dissolution while maintaining emission intensity.
Solution Approach 2:
The patent creates a composite luminescent system by combining a rare earth ion with specific organic ligands (phosphine oxide and β-diketone) to form a hybrid complex. This composite structure leverages the high emission properties of rare earths while the organic ligands provide compatibility with fluorine-based solvents.
2Illumination intensity
If concentration of rare earth complex is increased, then emission intensity is improved, but solubility in fluorine-based solvents deteriorates
Solution Approach 1:
The patent optimizes the concentration parameter by designing the rare earth complex with specific ligands that prevent aggregation and precipitation at high concentrations. The molecular structure of the complex is tailored to maintain solubility even at concentrations exceeding 0.01 wt %, enabling sufficient emission intensity for inspection.
3Object-affected harmful factors
If fluorine-based solvent is used, then safety and environmental friendliness are improved, but solubility of rare earth complex deteriorates
Solution Approach 1:
The patent changes the solubility parameters of the rare earth complex by introducing ligands with fluorine-based molecular structures and appropriate polarity. This parameter matching enables the complex to dissolve readily in fluorine-based solvents like perfluorinated compounds, achieving both safety and high solubility.
Solution Approach 2:
The patent creates a composite system where the rare earth complex is coordinated with fluorine-containing ligands. This composite structure provides compatibility with fluorine-based solvents, allowing the system to maintain safety benefits while achieving sufficient concentration and solubility for practical inspection applications.
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 composition provides sufficient emission intensity for effective fluorescent flaw inspection, enhancing detection accuracy and safety with environmentally friendly solvents.
Implementation Method 1
the luminescent material that has penetrated a damaged portion or the like is made to emit light by irradiation with an ultraviolet lamp
Implementation Method 2
a rare earth complex in which a phosphine oxide or a β-diketone is coordinated to a rare earth
Data Source
AI summary
The present embodiment provides a composition containing a rare earth complex and a fluorine-based solvent, which can also be used in a fluorescent flaw inspection method. A rare earth complex-containing composition according to the present embodiment is a rare earth complex-containing composition that contains a rare earth complex containing: a rare earth ion; two or more phosphine oxide ligands having different structures; and a β-diketone ligand, the rare earth complex being dissolved in a fluorine-based solvent. The present embodiment also relates to a fluorescent flaw inspection method using the same.