材料期刊网

Dome Combustion Hot Blast Stove for Huge Blast Furnace

ZHANG Fu-ming , MAO Qing-wu , MEI Cong-hua , LI Xin , HU Zu-rui

钢铁研究学报(英文版)

In Shougang Jingtang 5500 m3 huge blast furnace (BF) design, dome combustion hot blast stove (DCHBS) technology is developed. DCHBS process is optimized and integrated, and reasonable hot blast stove (HBS) technical parameters are determined. Mathematic model is established and adopted by computational fluid dynamics (CFD). The transmission theory is studied for hot blast stove combustion and gas flow, and distribution results of HBS velocity field, CO density field and temperature field are achieved. Physical test model and hot trail unit are established, and the numeral calculation result is verified through test and investigation. 3-D simulation design is adopted. HBS process flow and process layout are optimized and designed. Combustion air two-stage high temperature preheating technology is designed and developed. Two sets of small size DCHBSs are adopted to preheat the combustion air to 520-600 ℃. With the precondition of BF gas combustion, the hot blast stove dome temperature can exceed 1420 ℃. According to DCHBS technical features, reasonable refractory structure is designed. Effective technical measures are adopted to prevent hot blast stove shell intercrystalline stress corrosion. Hot blast stove hot pipe and lining system are optimized and designed. After blowing in, the blast temperature keeps increasing, and the monthly average blast temperature reaches 1300 ℃ when burning single BF gas.

关键词: dome combustion hot blast stove , high blast temperature , ceramic burner , high temperature combustion air preheating , CFD

FU105大功率广播发射管用碳化镧钼阴极研究

万小峰 , 张久兴 , 周文元 , 李湘波 , 周美玲

稀有金属材料与工程

研究了FU105大功率广播发射管用碳化镧钼阴极,参照碳化钍钨阴极FU105管的制备工艺,实现了镧钼阴极的碳化以及镧钼阴极FU105管的排气和老炼.通过镧钼阴极FU105管的性能测试,对碳化镧钼阴极的发射能力和稳定性进行了分析.结果认为:FU105管碳化镧钼阴极的发射能力可以达到碳化钍钨阴极的水平,但其稳定性还有待改进.

关键词: 镧钼阴极 , FU105发射管 , 碳化 , 稀土

[Pt(en)(5-Fu)2]Cl2配合物的合成及抗肿瘤活性

钟文远 , 崔永春 , 范春兰 , 胡智兴 , 李玛琳

贵金属 doi:10.3969/j.issn.1004-0676.2004.02.005

为寻求高效低毒的新型顺铂类抗肿瘤药物,用K2PtCl4、乙二胺(en)、氟尿嘧啶(5-Fu)为原料,设计合成了顺铂类似物[pt(en)(5-Fu)2]C12配合物,由元素分析、红外光谱和质谱分析初步证实了其化学结构,用改良MTT、SRB法,选用K562、A549、Bel-7402、BIU-87、Bcap-37细胞株对其进行体外抗肿瘤活性测定.结果表明,所合成的配合物除在浓度为0.01、0.1 μg/mL时对K562细胞株抗肿瘤活性大于顺铂和氟尿嘧啶外,其它情况下的抗肿瘤活性均小于顺铂和氟尿嘧啶.该配合物仍有进一步研究的价值.

关键词: 药学 , 铂(Ⅱ)配合物 , 合成 , 抗肿瘤活性

Jian ZHANG/Langhong Lou

材料科学技术（英文）

关键词:

Ion sputter erosion in metallic glass-A response to "Comment on: Homogeneity of Zr(64.13)Cu(15.75)Ni(10.12)Al(10) bulk metallic glass" by L-Y. Chen, Y-W. Zeng, Q-P. Cao, B-J. Park, Y-M. Chen, K. Hono, U. Vainio, Z-L. Zhang, U. Kaiser, X-D. Wang, and J-Z Jiang J. Mater. Res. 24, 3116 (2009)

Journal of Materials Research

The morphology of the dark and bright regions observed by transmission electron microscopy for the Zr(64.13)Cu(15.75)Ni(10.12)Al(10) bulk metallic glass strongly depends on the ion beam parameters used for ion milling. This indicates that the ion beam could introduce surface fluctuation to metallic glasses during ion milling.

关键词: room-temperature

聚天冬氨酸交联温敏性水凝胶的药物缓释性能

于跃芹 , 常宪智 , 田红杰 , 许洋

高分子材料科学与工程

选用牛血清蛋白(BSA)和5-氟尿嘧啶(5-FU)为模型药物,以聚天冬氨酸交联温敏性水凝胶为载体材料,采用包埋法制备了载药水凝胶,研究了水凝胶的载药和释药性能.水凝胶对BSA和5-FU的包埋率均大于98%.37℃时,水凝胶中丙烯酸用量越大,BSA的释放率越低;交联剂用量对BSA的释放率无显著影响.25℃时,丙烯酸用量越大,5-FU的释放率越大;交联剂用量越大,5-FU的释放率越小.37℃时,丙烯酸用量越小,5-FU的释放率越大;交联剂用量越大,5-FU的释放率越小.

关键词: 温敏性水凝胶 , 药物缓释 , 5-氟尿嘧啶 , 牛血清蛋白

磁性壳聚糖-5-氟尿嘧啶纳米粒的制备及体外释药性能

李和平 , 肖华伍 , 肖子丹 , 阮建明

高分子材料科学与工程

采用交联-聚合法在超声波的作用下,制备了磁性壳聚糖-5-氟尿嘧啶纳米粒(MCN-Fu).透射电子显微镜(TEM) 和红外光谱(IR)等分析结果表明,MCN-Fu粒子外形规整,分散性好,粒径主要在50 nm～60 nm 之间.紫外-可见光谱分析结果表明,MCN-Fu的载药量为21.3%,在磷酸盐缓冲溶液(pH=7.2)中,30 h的累积释药率为67.6%,具有良好缓释性能,并具有良好磁响应性能.

关键词: 磁性 , 壳聚糖 , 氟尿嘧啶 , 纳米粒 , 药物缓释剂

Broer-Kaup-Kupershmidt方程的新精确解

杨立娟 , 杨琼芬 , 杜先云

量子电子学报 doi:10.3969/j.issn.1007-5461.2012.02.003

CK方法是求解非线性发展方程的一种有效的直接方法.利用推广的CK方法,求得(2+1)维Broer-Kaup-Kupershmidt方程的Backlund公式,从而获得方程的大量新的精确解,推广了Xu和Zhang的结果.

关键词: 非线性发展方程 , Broer-Kaup-Kupershmidt方程 , 精确解 , CK方法 , Backlund变换

Three-dimensional (3D) Ising universality in magnets and critical indices at fluid-fluid phase transition

Phase Transitions

Experimental data for critical exponents in some magnetic materials are compared with recent theoretical results on the three-dimensional (3D) Ising model, as derived by one of us (ZDZ) based on two conjectures [Z.D. Zhang, Conjectures on the exact solution of three-dimensional (3D) simple orthorhombic Ising lattices, Phil. Mag. 87 (2007), pp. 5309-5419]. It is found that critical exponents in some bulk magnetic materials indeed form a 3D Ising universality. Our attention is then focused on the critical indices at fluid-fluid phase transition. We suggest to use Zhang's exponent = 3/8 to fit the experimental data over the wider asymptotic region near the critical point of a fluid-fluid phase transition. The 3D Ising universality should exist for critical indices in a certain class of magnets and at fluid-fluid phase transition.

关键词: magnetically ordered materials;fluid-fluid;phase transitions;order-disorder effects;ferromagnetic curie temperature;liquid critical phenomena;x-ray-scattering;critical exponents;critical-point;coexistence;curves;binary-solutions;ionic-solutions;behavior;equation

Response to the Comment on 'Conjectures on exact solution of three-dimensional (3D) simple orthorhombic Ising lattices'

Philosophical Magazine

The error of Equation (15b) in my article [Z.D. Zhang, Phil. Mag. 87 (2007) p.5309] in the application of the Jordan-Wigner transformation does not affect the validity of the putative exact solution, since the solution is not derived directly from that equation. Other objections of Perk's comment [J.H.H. Perk, Phil. Mag. 89 (2009) p.761] are the same as those in Wu et al.'s comments [F.Y. Wu et al., Phil. Mag. 88 (2008) p.3093; p.3103], which do not stand on solid ground and which I have sought to refute in my previous response [Z.D. Zhang, Phil. Mag. 88 (2008) p.3097]. The conjectured solution can be utilized to understand critical phenomena in various systems, whereas the conjectures are open to rigorous proof.

关键词: 3D Ising model;exact solution;conjecture;critical phenomena;ferromagnetism;magnetic phase transition;model;analyticity