对难变形镍基高温合金GH720Li进行了亚固溶处理、亚固溶+单时效(650℃,24 h→空冷)或双时效处理(650℃,24 h→空冷+760℃,16 h→空冷)以及870℃时效3000 h条件下γ′相演变规律的研究.发现一次γ′相受亚固溶处理影响较大,发生部分回溶的程度随固溶温度升高而增大,时效处理使一次γ′相向球形或近球形转变;二次和三次γ′相在亚固溶保温过程中完全回溶,在时效处理时补充析出明显且析出数量和区域随固溶温度升高而增大;870℃长期时效时,合金组织逐渐均匀,二次和三次γ′相完全回溶,晶界一次γ′相时效500 h后有所粗化,合金硬度先降低而后保持不变

采用固相法合成了锂钛复合氧化物Li4Ti5O12研究了保温时间对其结构及电化学性能的影响.结果表明,保温时间为2,4h时样品的循环性能比较好,在80mA/g充放电下,30次循环后的比容量可高达159mAh/g

1适用范围 本方法适用于测定饮用水、地表水、废水中的Li、Na、nH4、k+、Mn2+、Ca2+ Mg2+、Sr2+、Ba2+.检测范围:Li0.01~1mg/L,a01~10mg/l,nh40.1~10mg/L,k+0.1 10mg/L,mn2.5~50mg/L,Ca20.5~50mg/L,mg20.5~50mg/l,sr20.5~50mg/L,Ba2+1 100mg/L

1. The traditional role of tribute 2. Tributaries of the late Ming Table 1: Ming tributaries c. 1587 3. The Li Fan Yuan (Court of Colonial Affairs) under the Ch'ing 4. Ch'ing tributaries from the south and east,-general regulations Table 2: Regular Ch'ing tributaries Table 3: Frequency and routes of tribute 5. European countries in the tributary system Table 4: European embassies to the Court of Peking 6. Ch'ing tribute embassies and foreign trade Table 5: Tribute embassies 1662-1911 Table 6: Non-tributary trading countries 1818 7. A selected list of Ch'ing works 1644-1860 on maritime relations 8. Index of tributaries listed in six editions of the Collected Statutes

• Introduction of Tin • Chemistry of Tin • Molecular structure and Li insertion • Synthesis and modification methods • One literature example

• Why safety? • Origins of safety concerns • Thermal runaway process: 3 stages • Materials with improved battery safety • Materials to solve problems in 3 stages

9.1 卤代烃的分类和结构 9.4 卤代烃与金属的反应 9.1 卤代烃的分类和结构 9.1.1 卤代烃的分类 9.4 卤代烃与金属的反应 9.4.1 与Mg反应 9.1.2 卤代烃的结构 9.2 卤代烃的亲核取代反应 9.4.2 与Li反应 9.2 卤代烃的亲核取代反应 9.4.3 与Na反应 9.2.1 饱和碳亲核取代反应 9.5 卤代烃的还原反应 9.2.2 苯环上亲核取代反应 9.3 卤代烃的消除反应 9.6 多卤代烃简介 9.6.1 多卤代烷烃 9.3.1 卤代烃脱HX反应 卤代烃脱卤素反应 多卤代烷烃 9.6.2 多卤代烯烃和多卤 9.3.2 卤代烃脱卤素反应 代芳烃

§12.1 The general properties of the s-block elements §12.4 The particularity of Li and Be The diagonal relationship §12.3 The properties of the alkali and alkaline earth compounds §12.2 The elementary substances

1. Why is in situ imaging important 2. The BEC setup at IOP and our in situ imaging plan 3. The 87Rb- 40K- 23Na(6Li) project at IOP

《作物栽培学》课程教学资源（实验指导）LI-6400 XT便携式光合仪