1.The result of XRD patterns and SEM confirmed that the compound K_2Nb_4O_11 which was sintered at 1000℃ for 2 hours assumed a tetragonal tungsten bronze structure with space group P4/mbm (127) as those given in JCPDS data cards (JCPDS 38-0297) for K_2Nb_4O_11 crystals.
XRD和SEM检测结果表明:在1000℃焙烧2h时可合成纯度较高的K_2Nb4_O_(11)粉末晶体,铌酸盐化合物K_2Nb_4O_(11)属于四方晶系,空间群P4/mbm(127),结构为钨青铜(tungsten bronze,TB)型结构(JCPDS 38-0297)。
2.Using tungsten powder with BET calculated grain size of 46.1 nm as starting material,when the carburization temperature increases from 1 000 °C to 1 300 °C,the BET calculated grain size of tungsten carbide powder increases from 68.6 nm to 339.4 nm and the oxygen content decreases from 0.44% to 0.10%. Inheritance character in grain size distribution of tungsten carbide from tungsten starting material has been observed.
WC粉对原料W粉的粒度分布特征具有继承性; 采用比表面积平均粒度为46.1nm的W粉为原料,当碳化温度由1 000°C增加至1 300°C时,WC的BET比表面积平均粒度由68.6 nm增加至339.4nm,氧含量由0.44%降低至0.10%。
3.In this process,the particle pattern of blue tungsten oxide(TBO),the phase ingredients of blue tungsten oxide deoxidizated into γ-tungsten oxide(WO?(2?72)),γ-tungsten oxide deoxidizated into WO?2 and WO?2 deoxidizated into W-powder(α-W) are studied .
在此过程中研究了蓝钨的颗粒形貌,以及蓝钨还原为γ 氧化钨(WO2 72)、γ 氧化钨(WO2 72)还原为二氧化钨(WO2)和二氧化钨还原为钨粉的相变情况。
4.The research object of this paper is the key technologic equipment——the bloomer for the special tungsten billets. This paper introduced the current technique and equipment of the bloomer for special tungsten billets, analyzed the existing problems, optimized the mechanical structure with the theory of the high rigidity and the rolling force dispersal, and designed the four-high rolling mill for the special tungsten billets.
本课题以项目的关键工艺设备——特种钨坯条的开坯轧机为研究对象,介绍了当前特种钨坯条的开坯工艺及设备,分析其存在的问题,并应用轧机高刚性及分散轧制力的原理进行机械结构的优化,设计出适合特种钨坯条开坯的四辊钨杆轧机。
5.Group of tungsten industry of Amoy, the largest tungsten production enterprise in the world, determined to carry on an automatic transformation to its tungsten pole swaging process production line.
世界上最大的钨丝生产企业——厦门钨业集团,决定对其钨杆旋锻加工生产线进行自动化改造。
6.The curing reaction and dynamics of ablative material-tungsten phenolic resin were studied by DSC. In the meantime, the thermal stability of its curing products was investigated by TG. The results show that, the curing temperature of tungsten phenolic resin increases slightly with the increasing of tungsten content.
用DSC方法研究了烧蚀材料钨酚醛树脂的固化反应及其动力学，用TG方法研究了固化产物的热稳定性．结果表明．随着钨含量增加，钨酚醛树脂固化温度略有增高；
7.The research shows that the faults trending in SN and NNE belong to open-oxidic and opener-leaning oxidic tectonochemical environment, having great advantage for formation of tungsten deposits and tungsten-tin deposits, while those trending in EW and NW are more closed-reductive tectonochemical environment, showing no condition for tungsten-tin mineralization.
研究结果表明：SN向和NNE向断裂属开放氧化和较开放偏氧化的构造化学环境，有利于钨矿床和钨锡矿床的形成； EW向和NW向断裂属较封闭还原的构造化学环境，不具备钨锡成矿的条件。
8.Project profile: Tungsten products here stated are products made from tungsten or tungsten alloys except cemented carbides and they are widely used in industrial branches of machine, electricity, aerospace, national defense, daily life and so on.
项目内容：钨制品系指不包括硬质合金在内的其它以钨为主要成份的合金材料及其制成品，在机械制造、电气工程、航空航天、国防军工、日常生活中应用十分广泛，是次于硬质合金的又一类含钨结构材料。
9.Ganzhou government strictly executed the national policy and yearly plan for tungsten concentrate producing by adopting measures of managing tungsten quota, controlling the supply of detonator materials, approving the confidential of artificial person and controlling the output strictly.
赣州还认真执行国家下达的钨精矿年度开采计划，采取钨精矿生产配额管理、公安部门批供火工产品、矿产资源管理部门办理准运手续等措施，严格控制生产总量，做到了钨精矿产量6年多来逐年稳中有降。
10.The preparation of nano porous tungsten oxide films has been reported using a sol-gel process with the starting tungsten powders together with the dip coating method.
以金属W粉为无机原料 ,采用溶胶 -凝胶技术 ,结合浸渍镀膜方法 ,制备出纳米多孔WO3薄膜 ,研究了热处理对薄膜性能的影响 .
