Results 61 to 70 of about 635,480 (134)
, 2014 本发明涉及一种以环氧化合物为原料，水解制备二醇的方法。该方法采用纯铈氧化物或是金属负载型铈氧化物为催化剂。具体过程为：将催化剂加入至环氧化合物的水溶液中，在室温至180°C下催化其水解生成二醇，色谱测得环氧化合物转化率为40%~99%，二醇选择性75%~99％。本发明所涉及的制备二醇的方法，催化剂制备简单，稳定性高，反应条件较为温和 ...
王业红, 王峰, 徐杰, 张晓辰
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT TiN films deposited by physical vapor deposition (PVD) are widely used as protective films due to their high hardness and wear resistance. However, their application under high‐load conditions is limited by poor load‐bearing capacity and susceptibility to spalling on soft substrates.
Ziyu Wang +6 more
wiley +1 more source
, 2010 一种用于马来酸二烷基酯加氢制备丁二酸二烷基酯的催化剂及其制备方法。催化剂是由主活性组分和助剂组成，主活性组分为氧化铜，助剂为氧化铝和氧化锌，在催化剂总重量中氧化铜占40～60％，氧化锌占20～50％，氧化铝占10～20％。其制备方法是将主活性组分和助剂的可溶性盐类溶解于去离子水中，在加热搅拌下用碱溶液中和到pH＝7，将生成的沉淀过滤，洗涤，干燥，焙烧，成型。使用本发明的催化剂进行马来酸二烷基酯加氢制备1，4-丁二酸二烷基酯，可以实现较低的反应压力，从而能较大地降低生产装置的一次性投资和生产成本 ...
严丽, 林培滋, 郁俊冬, 丁云杰
core
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT In laser‐directed energy deposition (LDED) of TiC/Ti6Al4V composites, a low content of micron‐sized TiC provides a good strengthening effect on hardness and strength, but the improvement in plasticity remains a challenge. By introducing synchronous ultrasonic impact treatment (UIT) into the LDED process, an ultrasonic‐assisted LDED (UA‐LDED ...
Yuzhou Zeng +9 more
wiley +1 more source
, 2003 本发明提供一种凝胶珠制备系统，主要由储料罐、输送及微液滴制滴等三部分组成；储料罐部分带有温控和控制搅拌装置；输送部分由蠕动泵与胶管构成；微液滴制滴部分由多嘴喷头与液滴发生器及凝胶化容器构成。该制备系统在生产过程中所得凝胶珠均匀且产率可调，便于连续生产 ...
马小军, 任吉伦, 何洋
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Zhongguo shiyan zhenduanxue, 2010 目的制备兔抗人S100A7（hS100A7）多克隆抗体。方法制备原核表达重组人S100A7,用纯化的hs100A7为免疫原免疫新西兰大白兔,制备兔抗人S100A7抗体,并以间接ELISA测定抗体效价,以Western blot和免疫组织化学法鉴定抗体的特异性。结果成功制备了重组人S100A7及其抗体,ELISA结果显示抗体效价达1∶16000,Western blot和组织化学法分析表明该抗体能特异结合hS100A7。结论以纯化的重组人S100A7为免疫原,成功地制备了效价高 ...
梁晓东, 何素辉, 陈章权
doaj
Unveiling Entropy‐Driven Hard‐Tough Synergy Mechanisms in High‐Entropy Carbonitride Ceramics
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT High‐entropy ceramics manifested promise for extreme environments, yet their phase stability and mechanical synergy mechanisms remain elusive. Herein, entropy‐difference carbonitrides, including (TaTiV)CN, (TaTiVNb)CN, and (TaTiVNbHf)CN, were designed and consolidated via spark plasma sintering.
Long Zhao +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT An ultra‐high as‐deposited tensile strength of 1408 MPa—the highest reported value for laser‐directed energy deposition (L‐DED) fabricated Ti2AlNb alloy—is achieved in this study. The as‐deposited microstructure consists of coarse B2 grains with a high density of fine acicular O phase precipitates within the grains, along with a brittle α2 ...
Ximiao He +7 more
wiley +1 more source
Gongye shui chuli, 2013 采用简化双碱法制备K2FeO4,以NaOH代替了部分KOH,省去了除杂、干燥程序,降低了制备的成本,克服了难以大规模制备、储运的弱点。将简化法制备的K2FeO4用于处理印染厂废水,pH为6～9,投加35 mg/L的K2FeO4和4 mg/L的PAM,可以达到较好的处理效果,其中色度、SS去除率超过95%,COD、BOD5去除率超过60%,同时提高了废水的可生化性。
庄玉贵, 李良超
doaj +2 more sources