03/08/2007 • Laboratory appliances

FRITSCH premium line / Creation of Nano particles

With a revolutionary, new grinding concept, FRITSCH has taken the decisive step, to fulfil the demand of their customers to be able to grind small sample quantities down to the nano range (1nm = 10-9 m).

With the FRITSCH premium line planetary mill, the decisive step into the nano class has now been taken. The revolutionary new feature of the premium line is the sinking of the grinding bowls into the sun disk of the mill.

Why did FRITSCH sink the grinding bowls?
The grinding of materials down to the nanometer range requires very high application of energy and therefore significantly higher rotational speeds than those allowed by typical planetary mills. Conventional planetary ball mills are characterised by grinding bowls that are clamped to the sun disk. This limits the maximum possible rotation speed because as of a specific speed limit, the centrifugal forces acting on the bowls will be so great that the clamping of the bowls can no longer hold. Damage to the mill and the bowls would result.

Sinking of the grinding bowls into the sun disk of the mill solves these problems! Now, the centre of gravity of the bowls lies in the plane of the sun disk. The centrifugal forces arising generate significantly lower overturning moment, which in turn allows the mill to run at a significantly higher speed. As a result, the new FRITSCH premium line attains a speed of up to 1100rpm, generating up to 150% higher energy application. This significantly reduces the grinding time to reach the nanometer range. For certain materials, only this level of energy application even allows the creation of nano particles with planetary ball mills.

Further advantages

The sunken bowls also simplifies the handling and improves the process safety. The grinding bowls are clamped into the mill using the SelfLOCK technology with only two hand motions. Incorrect operation is impossible!

An RFID-chip integrated into the lid of the bowl also automatically identifies the grinding bowls used. The rotation speed is optimized and impermissible grinding settings are prevented. Naturally, a balance check is integrated which prevents start up of the mill if it is loaded incorrectly.

The completely newly developed special bowls allow for secure sealing. Any overpressure arising during grinding can be released in a controlled fashion through a built-in valve in the lid.

In other words, the best conditions for achieving precise and reproducible grinding results down to the nano range.

For routine operation, the premium line is naturally also capable of generating and saving various grinding programs. The variable parameters are speed, grinding time, pause times and reverse mode. It is possible to generate SOPs (Standard Operating Procedures) that can be protected with a password. The premium line has USB, Bluetooth and Ethernet interfaces for integration into the IT structure of the laboratory. Naturally, all grinding parameters can be recorded and saved by special software. This makes it possible to validate the grinding process.

Grinding bowls in the sizes 20ml, 45ml and 80ml are available for the new FRITSCH pulverisette 7 premium line. A series of different bowl materials are available for the widest range of applications, of course. From agate to zirconium oxide, from steel to hardmetal tungsten carbide, the right material exists for every application. In addition, it is possible to select from an entire range of different ball sizes. It should be noted in particular that increasingly small grinding balls are also required in order to achieve ever smaller particle sizes.

FRITSCH PULVERISETTE 7 premium line: the new standard to create nano particles in the Laboratory scale!

Test the FRITSCH premium line Planetary Mill:
We can write a lot - convince yourself! Send us your sample for test grinding and compare the results! You will be surprised!

By the way:
The new FRITSCH planetary mill premium line was awarded on the occasion of the Hannover fair with the Innovation Award Industry in the nano technology category. Among 300 participants FRITSCH GmbH – Manufacturers of Laboratory Instruments secured this award.

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FRITSCH GmbH Mahlen und Messen

Industriestrasse 8
55743 Idar-Oberstein

Phone: +49 (0) 6784/ 70- 0
Fax: +49 (0) 6784/ 70- 11