The term "high-grade material" is a correct and usable phrase in written English.
It is generally used to refer to something of a higher quality than normal, and can be used to describe almost anything. For example: "This dress is made from high-grade material and is designed to last."
Tests of the uranium seized confirmed that it was high-grade material that could be used in a nuclear bomb.
Natanz could produce enough high-grade material for some 100 small nuclear warheads (roughly the power of the Hiroshima bomb) within two years.
The plane's tail, made almost entirely of the high-grade material, known in the industry as composite, came off during the doomed flight that left all 260 on board and 5 others on the ground dead.
Iran today has five tons of low-grade fissile material, enough, when converted to high-grade material, to make about five to six bombs; it also has about 175 pounds of medium-grade material, of which it would need about 500 pounds to make a bomb.
A significant gap in accretion of tens of million years followed the initial accretion of the high-grade material (Dumitru et al. 2010; Wakabayashi 2015).
These models incorporate the game-changing off-axis benefits of the CST driver technology coupled with high-grade material construction to ensure uniform sound coverage throughout a home theater as well as background listening applications.
Furthermore material-saving machining is attracting special attention for high-grade materials.
But their use as γ detectors for medical imaging at high resolution requires production of high-grade materials and large quantities of sophisticated read-out electronics.
Although current commercial silicon solar cells can reach 10 20% power conversion efficiency (PCE), current solar cell manufacturing processes require high temperatures, vacuum technologies, and high-grade materials, all of which increase cost.
The decision was taken to use CdTe rather than CdZnTe, because the manufacturer (Eurorad, France) has a large experience for producing high-grade materials, with a good homogeneity and stability and whose transport properties, characterised by the mobility lifetime product, are at least 5 times greater than that of CdZnTe.
With enough low-grade or high-grade materials, the receiving parties may not be able to create a nuclear bomb (unless they are wealthy states), but they could create a deadlier, more disruptive dirty bomb and perhaps many of them.
