1.colorless watery fluid of blood and lymph containing no cells and in which erythrocytes and leukocytes and platelets are suspended
2.a green slightly translucent variety of chalcedony used as a gemstone
3.(physical chemistry) a fourth state of matter distinct from solid or liquid or gas and present in stars and fusion reactors; a gas becomes a plasma when it is heated until the atoms lose all their electrons, leaving a highly electrified collection of nu
particles in space exist in the form of a plasma
含義 等離子體被稱為固態(tài)、液態(tài)、氣態(tài)以外的第四態(tài)。 它是部分電離的氣體, 由電子, 離子, 自由基, 中性粒子, 及光子組成。 等離子體本身是含有物理和化學活潑粒子的電中性混合物。 這些活潑自由基粒子能夠做化學功, 而帶電原子和分子通過濺射能夠做物理功, 結(jié)果, 通過物理轟擊和化學反應(yīng), 等離子工藝能夠完成各種材料表面改性, 包括表面活化、 污染物去除、刻蝕等功效。 由來 "plasma"一詞最早在生物學名詞原