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. Kinetics of removal of chromium from water and electronic process wastewater by ion exchange resins: 1200H, 1500H and IRN97H [J]. Journal of Hazardous Material, 2003, 102: 257-275. [10] BHATTACHARYYA K G..., protonic form, and acid-base intercalation properties [J]. Chemistry of Materials, 1998, 10: 4123-4128. [22] OGAWA H, INADA K, ITOI N, TAKAHASHI S. Lepidocrosite type potassium magnesium titanate......
的新一类合金材料.该型合金通过特殊粉末冶金方式制备,在铁铬合金基体中原位生成大量,弥散,具有纳米尺度特征(1~10 nm)的微结构.这些纳米结构或以共格富(Y-Ti-O)原子簇团(类似GP区),或以近化学计量比的复杂氧化物(Y2TiO5或Yi2Ti2O7)形式存在,连同所获得的细晶组织,超高位错密度(约1×1024 m-3),可使该合金获得远超过常规铁基合金的高温力学性能(蠕变强度,断裂韧性)以及...具有异常摩尔比(n(Ti)/n(Y)为1.5~4,n(O)/n[Ti+Y]＜1)的纳米特征物,可能以原子团簇为主,但也可能存在有严重偏离化学计量比的Yi2Ti2O7.近年来,国内研究人员也迅速跟进,但研究工作主要集中在制备工艺和性能评估上.其中,中南大学,北京科技大学,上海交通大学等[15-23]先后通过机械合金化结合热致密化和形变热处理,获得了较高密度,特征尺寸为3~10 nm纳米析出结构......
as commercial secondary alloy in the form of ingots and used as a base-line. The ingots were pre-heated at (150±10) °C and subsequently brought to the melting temperature at (780±10) °C. The chemical composition... of about 200 °C according to standard foundry practice. Before pouring, the temperature of the die was increased up to (350±10) °C. The temperature of the die was measured by means of thermocouples......
Science Publisher Ltd, 1973. [9] ASM Metal Handbook: Casting [M]. ASM International, 1992. [10] WILSON B C, CUTLER E R, FUCHS G E. Effect of solidification parameters on the microstructures......
铅焊料的文献主要为发明专利.专利[57]中报道了一种含铈铷锌的无铅焊料及其制备方法,该无铅焊料含有铈0.2%~0.5%,铷0.05%~0.1%,锌5%~10%(质量分数),余量为锡.该无铅焊料既能避免铅的危害,又具有良好焊接性能和电气力学性能.添加少量的铷,可以清除制备过程中侵入锡液中的空气,进一步提高了无铅焊料的焊接性能和电气力学性能.专利[58]中报道一种含氧化镓的铯铷钎剂,含有0.12...-rubidium) system[J]. Bulletin of Alloy Phase Diagrams, 1986, 7(2): 139-142. [10] PELTON A D, LAROSE S. The Ga-Rb (gallium-rubidium) system[J]. Journal of Phase Equilibria, 1990, 11(4): 354-356. [11......
mode, providing lower strip temperature. The transformation of the main texture components (rolling texture: β-fiber, and recrystallization texture: cube) is shown in Fig. 10. At sufficiently high... fractions in the slab and in the self-annealed coil can be observed in Fig. 10(a). At temperatures below the critical level (schedule 2), the cooled coil retains a deformed structure with prevailing β-fiber......
at 5 min to the maximum of 326 MPa at 15 min, and then decreased slowly to 302 MPa at 300 min (see Fig. 6(b)). The elongation increased from 10% at 5 min to the maximum of 13% at 30 min.... In this study, most solution treatments were carried out at 490 °C, which was ~75 °C lower than the solidus line and ~67 °C lower than the eutectic reaction temperature (see Fig. 10). The experimental......
′,N′-四己基-3-氧戊二酰胺的合成步骤如下:向装有磁力搅拌器,恒压滴液漏斗的三口烧瓶中加入二正己胺和10 mL吡啶,以二氯甲烷作溶剂,冰浴下磁力搅拌反应.将2,2′-氧代二乙酰氯通过恒压滴液漏斗缓慢滴加至烧瓶中,2 h内滴加完毕,保持烧瓶内温度在0~5 ℃.滴加完毕后,室温下搅拌反应6 h.先用10%(质量分数)的稀盐酸洗涤反应后的液体,除去未反应的二正己胺,再用二次水洗涤至中性,无水硫酸钠干... Rare Earths, 2006, 27(1): 70-72. [10] 周晓文, 温德新, 罗仙平. 南方离子型稀土矿提取技术研究现状及展望[J]. 有色金属科学与工程, 2013, 3(6): 81-85. ZHOU Xiao-wen, WEN De-xin, LUO Xian-ping. The status quo and development trend......
, Norway [J]. Neues Jahrbuch Für Mineralogie - Monatshefte, 2002, 4: 169-181. [10] KWAK T A P. The geology and geochemistry of the zoned, Sn-W-F-Be skarns at Mt. Lindsay, Tasmania, Australia [J......
图 Fig. 1 Location and result map of marine shale gas exploration in the Paleozoic in Northwestern Hunan 2.2 岩石学特征 基于野外露头和岩心资料,结合薄片观察及X线衍射矿物分析,两套页岩的岩石学特征存在明显差异. 1) 湘西北牛蹄塘组以硅质页岩为主,钙质质量分数一般为10%~20%,最高可达40%以上；五峰组-龙马溪组以硅质页岩,硅质岩为主,钙质质量分数一般低于10%,如表1所示. 2) 牛蹄塘组富含重晶石,磷结核,石煤等,并且富集Zn,Cr,As,Se,Ba,V和U等微量元素, w(U)/w(Th)高可达5.71,稀土元素存在Eu正异常与Ce负异常,w(TOC)与多种异常金属元素质量分数呈很好的线性关系,反映了热水沉积的特点[15-16]；在五峰组-龙马溪组岩心中观察到大量笔石化石......
