High-Purity Zirconium Crucible for Analytical Sample Melting
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Solution Overview
Problem
Conventional zirconium crucibles with lower purity levels introduce impurities during high-purity material analysis, leading to variable measurement results dependent on analyst skill and inability to achieve precise analysis of high-purity samples.
Innovation Solution
A zirconium crucible with a purity of 99.99 wt % or higher is used, combined with specific fluxes like sodium peroxide, to inhibit impurity inclusion and enable precise analysis by minimizing crucible-derived contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional zirconium crucible with 99 wt% purity is used, then the crucible is cost-effective and widely available, but impurities from the crucible contaminate the sample, raising the lower limit of determination and preventing high-precision analysis
Solution Approach 1:
The patent changes the purity parameter of the zirconium crucible from conventional 99 wt% to 99.99 wt% or higher, thereby reducing impurity content to levels that do not interfere with high-precision analysis of high-purity samples
Solution Approach 2:
The patent uses a high-purity zirconium crucible that can be disposed of after single use, eliminating the need for complex cleaning procedures and ensuring that no impurities from previous uses contaminate the sample, thus maintaining consistently low detection limits
2Measurement precision
If an iron or nickel crucible is used with sodium peroxide flux, then the melting process is effective, but the crucible is severely affected and introduces impurities into the sample
Solution Approach 1:
The patent uses a zirconium crucible that provides a chemically inert environment resistant to sodium peroxide flux, preventing crucible degradation and impurity release while maintaining effective melting conditions for the sample
Solution Approach 2:
The patent employs a zirconium-based crucible material that combines high purity with resistance to alkaline fluxes, creating a composite system that withstands the harsh melting conditions without contaminating the sample
3Reliability
If conventional melting methods with experience-based parameter adjustment are used, then the process is flexible and adaptable, but the results vary depending on analyst skill and require reanalysis
Solution Approach 1:
The patent performs preliminary optimization of the melting conditions using the high-purity zirconium crucible, establishing standardized parameters for flux ratio and heating temperature that eliminate the need for experience-based adjustments, thereby ensuring consistent results across different analysts
Solution Approach 2:
The high-purity crucible itself contributes to the reliability of results by minimizing impurity introduction, reducing the need for complex blank corrections and reanalysis, and enabling analysts of varying skill levels to achieve consistent high-purity measurements
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 high-purity zirconium crucible with optimized fluxes allows for accurate and fast analysis of high-purity materials with lower limits of determination at 10 wtppm or less, reducing labor and reagent usage while minimizing analyst skill variability.
Implementation Method 1
sodium peroxide has strong oxidizing power, and is a favorable flux
Implementation Method 2
The process of melting the sample with a flux
Data Source
AI summary
Proposed is a zirconium crucible used for melting an analytical sample in the pretreatment of the analytical sample, wherein the purity of the zirconium crucible is 99.99 wt % or higher. In light of the recent analytical technology demanded of fast and accurate measurement of high purity materials, the present invention provides a zirconium crucible for melting an analytical sample, a method of preparing such analytical sample, and a method of analysis that enables the analysis of high purity materials by inhibiting the inclusion of impurities from the crucible regardless of difference in the analysts and their skill.