Front-Loading XRD Sample Holder with Dished Bottom
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Solution Overview
Problem
Conventional XRD sample preparation techniques, particularly back-loading methods, suffer from high instances of preferred orientation, reduced sample preparation throughput, increased complexity, and manual intervention errors, leading to inaccurate and non-reproducible results, which are not suitable for the minerals processing industry.
Innovation Solution
A front-loading XRD sample preparation system utilizing a dished sample holder with a concave surface and a leveling device to distribute sample material evenly, minimizing direct pressure on the measuring surface and reducing preferred orientation, while automating the sample preparation process to enhance reproducibility and reduce manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If back-loading pressing method is used, then preferred orientation is reduced, but sample preparation throughput is reduced and device complexity increases
Solution Approach 1:
The patent inverts the conventional back-loading pressing method by using a front-loading approach where the sample is pressed from the front side. The sample holder has a front pressing surface that directly contacts the sample material, allowing pressure to be applied from the front rather than from the back. This inversion enables automated pressing mechanisms to apply uniform pressure more efficiently, increasing throughput while maintaining reduced preferred orientation through controlled pressing forces.
Solution Approach 2:
The sample holder is segmented into distinct functional components: a front pressing surface for applying pressure, a rear opening for material insertion and removal, and a base structure for support. This segmentation allows the pressing mechanism to be optimized independently for automated operation while the sample holder geometry maintains control over pressure distribution to minimize preferred orientation.
2Manufacturing precision
If back-loading pressing method is used, then preferred orientation is reduced, but device complexity and manual intervention increase
Solution Approach 1:
The front-loading sample holder is designed as a multi-functional component that integrates the pressing surface, sample containment, and material insertion/removal functions into a single structure. The front pressing surface serves both as a structural element and as the interface for automated pressing mechanisms, eliminating the need for separate pressing components and reducing overall device complexity while maintaining precision.
3Productivity
If conventional pressing methods are used, then sample preparation is performed, but manual intervention errors occur and reproducibility is reduced
Solution Approach 1:
The front-loading sample holder is designed to work with automated pressing mechanisms that can independently apply controlled pressure without requiring manual intervention. The structure allows the pressing force to be applied consistently through programmed movements, enabling the system to self-regulate the pressing process and eliminate variability introduced by manual operation, thereby improving both speed and reproducibility.
Data Source
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AI summary
Disclosed, is a sample preparation apparatus (6B) which is configured to prepare a material sample (900') suitable for X-ray diffraction. The apparatus (6B) comprises a dished sample holder bottom (500) configured to fit within an annular sample holder (400). The dished sample holder bottom (500) has a concave dished surface (501) which is adapted to distribute sample material (900) under pressing forces. A method of preparing a material sample (900') suitable for X-ray diffraction is also disclosed. The method comprises dosing a dished sample holder bottom (500) which is configured to fit within an annular sample holder (400) with sample material (900), wherein the dished sample holder bottom (500) preferably has a concave dished surface (501) which is adapted to distribute sample material (900) under pressing forces. A new leveling device design tool (Fig 12) is also disclosed. The leveling tool minimizes surface contact effects by penetrating the core of the sample and providing random sample grain orientation while evenly distributing material throughout the sample holder bottom. The sample material (900) is lightly pressed, and sample material (900) is distributed within the dished sample holder bottom (500) by virtue of the concave dished surface (501).