Test method for density of plastics by the density - gradient technique 密度梯度技術測定塑料密度的方法
Standard test method for density of plastics by the density - gradient technique 用密度梯度法測定塑料密度的標準試驗方法
In this paper , we prepared 110x80mm ti : al2o3 crystal ( 11 stone ) by directional temperature gradient technique ( dtgt ) , choosed its top , middle part and bottom , and fabricated powder samples with carnelian mortar . then we observed and analyzed the surface of ti stone by using sem , and found it is ti that is the main component of the black thing on the surface of ti stone 本文采用導向溫度梯度法制備了110 80mmti : al _ 2o _ 3晶體(鈦寶石) ,并取其上部、中部、下部用瑪瑙研缽制成粉末樣品,用掃描電子顯微鏡對鈦寶石表面進行了觀察分析,結果表明鈦寶石表面上的黑色物質的主要成分為鈦。