| 1. | The pure active material can be sintered in 5 hours by using solid - state method
用高温固相法5h就能合成出纯相活性物质。 |
| 2. | The purpose of this work is that preparing single - phase tl2ba2cacu2o8 hts thin film
本文以实现制备纯相的tl2ba2cacu2o8高温超导薄膜为目的。 |
| 3. | The results showed that the sample was pure - phase hap and the grain size was about 85 nm
经xrd分析及tem观察，为纯相的hap ，平均粒径为85nm 。 |
| 4. | Because of the doped ions sr2 + and sn4 + entering into the matrix lattice evenly and crystallizing completely , the sintered ceramics of the nano - sized powder have dielectric constant ten times higher and dielectric loss sixty percent lower than those of pure batio3 phase at room temperature
降低，而且室温介电常数比batio3纯相提高近ro倍，而介电损失降低到1 / 8 ，烧结温度比传统微米级粉体的烧结温度降低150一200 。 |
| 5. | ( 7 ) the gel made from the aqueous solution of al + and fe + ion was calcined at 500 , then the powder received were reduced in h2 atmosphere at different temperature , and the fe - al2o3 nanocomposites will be obtained as the reducing temperature increased to 900 . ( 8 ) the transition phase feal2o4 was found during fe2o3 was reduced to fe
( 7 )将均匀掺杂法制各的， fe _ 2o _ 3含量为30wt的复合干凝胶，经500预处理后作为还原的前驱体，在氢气气氛下，经900还原1小时得到了纯相的fe - al _ 2o _ 3纳米复合粉末。 |
| 6. | There are better performances in the films prepared by ba2ca2cu3ox target than by ba2cacu2ox target . the single - phase tl2ba2cacu2o8 hts thin film was obtained with a tc0 of 107k at the optimal tl2o partial pressure and thallination temperature 750 . on excursion from the optimal conditions , there exist some impurities in the resultant films resulting in a reduction in tc0 and surface quality with change in the microstructure morphology
研究结果表明，采用成分为ba2ca2cu3ox的靶材制备的薄膜性能要优于成分为ba2cacu2ox的靶材；使用组成式为tl1 . 9ba2ca2cu3oy的铊片做铊源时，形成的tl2o分压达到最佳值；在最佳tl2o分压和最佳铊化温度750的条件下，制备出了纯相完全c轴取向的tl2ba2cacu2o8高温超导薄膜，其tc0高达107k ，膜面均匀平整光滑，呈圆片状组织；偏离最佳制备工艺参数的条件下，制得的薄膜中都含有一定量的杂相，杂相的生成使得tc0值下降，薄膜表面质量下降，薄膜组织形貌发生变化。 |
| 7. | As - grown pmnt single crystal were pure perovskite structure and regular pseudo - cubic while pznt showed an arrow - head shape with the formation of pyrochlore phases . 3 . processing conditions were optimized in order to increase the size and yield of perovskite crystals by a high temperature flux solution method
制备pmnt单晶时均生成纯立方钙钛矿相结构，无焦绿石相产生，晶体几何外形多为规则的立方结构；制备的pznt单晶材料形状不规则，呈箭头状，且伴随有焦绿石相生成，因此纯相的pznt单晶材料较pmnt晶体更难合成。 |
