Retsch : Mulini planetari a sfere : PM 100 CM : Informazioni e Scarica

Referenze in letteratura (2)

Chemical activation of MgH2; a new route to superior hydrogen storage materials
We report the discovery of a new, chemical route for ‘activating’ the hydrogen store MgH₂, that results in highly effective hydrogen uptake/release characteristics, comparable to those obtained from mechanically-milled material. Hydrogen is widely regarded as a promising alternative to carbonbased fuels; it can be produced from a variety of renewable resources and, when coupled with fuel cells, offers the prospect of near-zero emission of pollutants and greenhouse gases.1 However, the development of hydrogen as a major energy carrier will require solutions to many scientific and technological challenges. Foremost among these is the issue of hydrogen storage; the lightest of all the chemical elements has an excellent energy content per unit weight, but a low energy content per unit volume.
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- [pdf] Inglese (336 KB)
ISO 659 Oilseeds - Determination of oil content
Ball Mills
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- [pdf] Inglese (117 KB)

Reports applicativi (12)

Nano particelle con effetti enormi
Gli scienziati hanno studiato le nano particelle (particelle estremamente piccole con meno di 100 nanometri di diametro) per molti anni. A proposito delle nano particelle, sono state sviluppate nuove ed innovative proprietà, es. semiconduttive o superficiali, cosi come l’effetto Lotus che ha aperto possibilità fino ad ora inaspettate.
Esistono diversi metodi per produrre nano particelle. La tecnica “bottom up” coinvolge la sintesi delle particelle da atomi e molecole. Con il metodo “top down”, le particelle vengono ridotte a dimensioni nanometriche tramite la macinazione. Lo strumento adatto per questa applicazione è il mulino planetario a sfere, come i RETSCH PM 100, PM 200, PM 400 che forniscono il necessario input di energia per la macinazione fino a dimensioni nanometriche.

Renewable raw materials are gaining ground
The representative sample preparation of plants requires experience

Preparation of Soil, Sewage Sludge and Sediment Samples in a Wastewater Treatment Laboratory
The preparation of a mixture of organic and inorganic samples holds some difficulties: whereas sand, clay and stones can usually be ground to homogeneous samples with suitable laboratory mills, the high energy input can cause samples with organic components such as fat or starch to cake. Carsten Bunn, a laboratory technician at the waste water treatment laboratory BRW, has to deal with this problem every day. He treats samples which are taken from the sand traps of the wastewater treatment plants and consist of exactly that mixture. The sediments of household and industry waste water not only contain sand, clay or leaves but anything that people nowadays dispose of through the sewer system: cellulose, hair and especially food residues.

Green Chemistry in the Lab
Mechanochemistry is a very effective method to carry out syntheses without solvents and by-products. The technical literature describes a great number of reactions where a conversion of 100% is achieved. A precondition for the establishment of mechanochemistry in the industrial sector is the availability of suitable laboratory mills. A decisive factor is that – similar to conventional preparative chemistry – ambient parameters such as pressure and temperature can be documented and monitored. The Planetary Ball Mills and Mixer Mills from Retsch fulfill these requirements.

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.

Consistent Milling on a Nano Scale
Planetary ball mills are helping scientists and engineers advance nanotechnology by providing a consistent way to produce nanoscale powders.

The preparation of samples of solid substances for spectroscopic analysis
X-ray fluorescence spectrometry is one of the most versatile multi-element methods of chemical analysis. The technique is based on excitation of fluorescent radiation from a sample by bombarding it with high energy X-ray quanta and subsequent study of the characteristic X-ray radiation emitted by its elements.

Bigger is not Better
There is a trend towards smaller samples that have more controlled particle size and yet remain representative of the material being analyzed.

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.

Kleine Partikel - großer Effekt
Die Anwendungsmöglichkeiten von Nanopartikeln sind so vielfältig wie ihre Form und E igenschaften. Technisch lassen sich die „Zwerge“ beispielsweise durch Vermahlung größerer Partikel erzeugen. Planeten-Kugelmühlen erreichen die für diese Nanovermahlung nötigen E nergieeinträge.

Zusammenspiel der Kräfte
Planeten-Kugelmühlen ermöglichen mechanisches Legieren dank ihrer hohen Zerkleinerungsenergie

Mechanisch legierte Werkstoffe haben schon längst ihren Einzug in die moderne Werkstofftechnik gehalten. Viele neue Werkstoffe und Werkstoffkomposite wurden in den letzten Jahren durch intensive Forschung entwickelt und werden bereits industriell hergestellt. Mechanisches Legieren ist ein gängiges Verfahren, um Werkstoffpaarungen oder Komposite zu synthetisieren, die auf konventionellem Wege nicht realisierbar wären, wie z. B. das Verbinden von Natur aus unmischbarer Legierungspartner. Das Werkzeug der Wahl dafür sind Planeten-Kugelmühlen.