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情報誌 "the sample" (11)

No. 37
NEW DIMENSIONS in sample preparation and particle analysis

No. 36
粉砕はアート－現代の粉砕技術

No. 34
2009年
新製品

No. 33
試料調整の具体例　＆　レッチェ新商品

No. 31
レッチェ・グランプリ＆２００８年新製品のご紹介

No. 30
環境分析のための粉砕機と粒子径分布測定装置

No. 29
新製品　2007年　新発売 GOLD　RUSHｷｬﾝﾍﾟｰﾝ

サンプル特別版 II

No. 24
Anniversary issue of the RETSCH customer magazine 10 years "the sample"

No. 32
機器分析のための試料調整　― レッチェの粉砕機を使った実験例を掲載しています。

No. 37
UNA NUEVA DIMENSIÓN en la preparación de muestras y análisis granulométrico

アプリケーションレポート (9)

できる限り純粋に
理想的な状態で粉砕が行われても、試料と粉砕容器の表面がこすれて起きる機械的ストレスによって粉砕容器の表面が摩耗します。しかし、粉砕機と粉砕容器を適切に選択することで、この摩耗を軽減することは可能です。もし試料を100μm未満に粉砕する必要がある場合は、非常に強い力が必要なので、その分、摩耗も大きくなります。

Representative results require adequate sample preparation
The following situation is typical for many production plants: After a routine quality check, the production process is stopped or an already produced batch is suspended, because the analysis results were not within the relevant critical values. But does the tested product really deviate from the specifications? The quality control managers are convinced of this because modern analysis instruments provide results with very low tolerances. The sample in question was tested several times and the result was confirmed. The question is why the product does not match the specifications although the production parameters have not been changed in any way.
The possibility that the tested product is indeed deficient cannot be excluded. However, it is often not the product itself which causes irregular analysis results but a lack of understanding of the steps which come before the analysis.

Air Jet Sieving of Bulk Materials
Particle size analysis and particle size distribution are important criteria for the quality control of bulk materials. In a running production process, the results of a quality check must be available quickly to allow for immediate adjustment of the production parameters. Depending on the expected particle size and sample volume, different sieving methods and sieving machines are suitable for analysis. The method used for particle size analysis is primarily determined by the fineness of the material to be sieved. For dry sieving of samples with particle sizes below 40 microns, air jet sieving is the method of choice.

Representative sample preparation for XRF analysis
Preparing homogeneous samples by milling

Fast and Reproducible Sample Preparation with a Vibratory Disc Mill
The Vibratory Disc Mill RS 200 from Retsch is used for the quick, loss-free grinding of hard, brittle and fibrous materials to analytical fineness.

Size reduction within the context of sample preparation
In general “size reduction” is taken to mean the disintegration of solid substances by mechanical forces without altering their state.

Increasing the development efficiency of ceramic materials
The development of high-performance ceramics is determined by a large number of influencing factors. In addition to material-specific aspects, such as the chemical purity of the initial raw materials, particle size reproducibility and uniformity of particle morphology, production-specific factors also determine the final properties of ceramics.

Höchstleistung im Doppelpack
Mit der PM 100 und der PM 200 präsentiert Retsch eine neue Generation von Planeten-Kugelmühlen mit einer bzw. zwei Mahlstellen, die in diesem Produktsegment neue Leistungsstandards setzen.

Herstellung von Nanopartikel mit der Planeten-Kugelmühle
Die Herstellung von Nanopartikeln, deren Größe im Bereich von 1 Mikron und kleiner liegt, ist in vielen technischen Bereichen immer mehr auf dem Vormarsch, denn sie ermöglichen die gezielte Veränderung von Materialeigenschaften.