A new form of matter - liquid glass. Free Technical Library News

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A new form of matter - liquid glass

07.01.2021

Scientists from the University of Konstanz in Germany announced the discovery of a new state of matter - liquid glass. The atoms of this substance exhibit strange behavior that chemists have observed for the first time. We are talking about the Bose-Einstein Condensate, which is formed when particles are cooled to ultra-low temperatures and can exhibit quantum properties.

There is a common misconception that glass is a liquid. Yes, at one of the stages of glass creation, some minerals (most often - quartz sand, soda ash, dolomite, limestone and others) are heated to a fluid state. Chemists from the University of Konstanz in Germany have confirmed that the atoms of glass can be made to move, thereby discovering a new state of matter, which is still called "liquid glass".

Mixtures of certain solids in liquids can move to form a liquid glass state, according to a new study. Scientists have confirmed that the particles of the substance they analyzed at higher concentrations block each other from rotating, but can still move. What is unacceptable for ordinary glass atoms.

"At certain particle densities, orientational motion froze while translational motion persisted, leading to the formation of glassy states in which particles clustered into local structures with a similar orientation," explains study lead author Andreas Zumbusch.

Previously, scientists predicted the possibility of discovering liquid glass, and a new study by German chemists confirms that similar processes of atomic movement can occur in glass-forming systems.

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Bearings that do not require lubrication 26.05.2015

The Japanese company Coo Space has proposed a new technology for creating rolling bearings that can reduce friction tenfold and dispense with the use of lubrication. The development is called Autonomous Decentralized Bearing (ADB).

Rolling bearings consist of two rings, rolling elements (balls or rollers) and a cage. The latter separates the rolling elements from each other, keeps them at an equal distance and directs the movement. On the inner and outer rings there are grooves - raceways.

There are rolling bearings made without a cage. They have a larger number of rolling elements and a higher load capacity. However, the limiting speeds of full complement bearings are much lower due to the increased torque resistance.

Autonomous Decentralized Bearings do not have a cage. In this case, to keep the balls at an equal distance from each other, small recesses in the surface of the ring serve: thanks to these recesses, the rolling elements periodically slow down and accelerate. This ensures efficient operation even without lubricant.

While bearings of a new type exist in the form of prototypes. But Coo Space is already negotiating with market participants to commercialize the proposed technology.

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