On November 5, according to foreign media reports, Japanese scientists developed a kind of superhard glass made of alumina, and the test showed that its hardness exceeds that of iron, copper and even stainless steel.

It can be used to make mobile phone screens, making the phone lighter and thinner. In addition, it can also be used to make automotive windshields, building windows, and more.

According to project leader Atsuno Masuno, Professor of the University of Tokyo's Academy of Industrial Sciences, “We are looking for ways to mass produce this new type of material. We believe it is possible to commercialize this technology within five years.”

Scientists used "aerodynamics" technology to combine alumina with another metal oxide, yttrium oxide.

They also used the Vickers method to test, that is, pressing the diamond into the material, and found that the new material can withstand 9.1 GPa pressure. In contrast, stainless steel can withstand 0.7 to 1 GPa pressure, and high-carbon steel can withstand 3.9 GPa pressure.

Researchers said that attempts to make glass from alumina had not been successful because they formed crystals when they touched the walls of the container, which prevented them from polymerizing into usable glass.

For this purpose, the research team uses oxygen to push this material into the air, which is then melted with a laser.

The researchers said: “In the visible light, the glass is colorless and highly transparent. We have been developing glass with high elastic modulus for many years. This kind of glass can maintain its strength even when the thickness is reduced. Thinner glass can be used to make windows for buildings, windshields for cars, smart phone screens, thin film transistor display substrates, etc."

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