Is boron amorphous or crystalline?Boron can be prepared in several crystalline and amorphous forms. The well-known forms of crystallization are α-rhombohedral (α-R), β-rhombohedral (β-R) and β-tetragonal (β-T). In spec…
It’s been an interesting period for the air cargo industry as volumes have been trending downwards since the first half of last year, while the capacity situation continues to change and rates remain above pre-Covid levels despite recent declin…
Admixtures can be used for almost all kinds of concrete, but suitable admixtures must be selected according to engineering needs, construction conditions and construction technology.…
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