The effect of the temperature and pH of chemical precipitation on the degree of
agglomeration of zirconium and hafnium hydroxides has been investigated. The
specific features of crystallization of zirconium and hafnium hydroxides have
been revealed. A technological scheme has been proposed for synthesizing ZrO2
and HfO2 nanocrystalline powders.
Magnesium (the lightest structural material) is suitable for manufacturing
movable parts of vehicles and finds wide application in car and aerospace
engineering. Magnesium alloys produced by conventional casting have defects and
large-sized grains and exhibit undesirable mechanical properties. The desirable
properties of magnesium alloys can be achieved by improving their
microstructure. This pape... hiện toàn bộ