排序方式: 共有35条查询结果,搜索用时 93 毫秒
31.
草酸盐在无机功能材料中的应用 总被引:3,自引:3,他引:3
介绍了3种常用草酸盐的制备方法:草酸盐共沉淀法、微乳液法和溶胶-凝胶法,并对相应的草酸盐形成的基本原理、特点以及在无机功能材料中的应用进行了综述.表明草酸盐将在无机功能材料制备方面得到更加广泛的应用. 相似文献
32.
R.L.Frost YANGJing ZheDing 《科学通报(英文版)》2003,48(17):1844-1852
Evidence for the existence of primitive life forms such as lichens and fungi can be based upon the formarion of oxalates. Oxalates are most readily detected using Raman spectroscopy. A comparative study of a suite of natural oxalates including weddellite, whewellite, moolooite,humboldtine, glushinskite, natroxalate and oxammite has been undertaken using Raman spectroscopy. The minerals are characterised by the Raman position of the CO stretching vibration which is cation sensitive. The band is observed at 1468 cm^-1 for weddellite, 1489 cm^-1 for moolooite, 1471cm^-1 for glushinskite and 1456 cm^-1 for natroxalate. Except for oxammite, the infrared and Raman spectra are mutually exclusive indicating the minerals are bidentate. Differences are also observed in the water OH stretching bands of the minerals. The significance of this work rests with the ability of Raman spectroscopy to identify oxalates which often occur as a film on a host rock. As such Raman spectroscopy has the potential to identify the existence or pre-existence of life forms on planets such as Mars. 相似文献
33.
用改进的双流加料共沉淀法和恰当的草酸盐沉淀剂组成,克服了草酸盐一次共沉淀不完全的缺点;依据共沉淀的钇钡铜草酸盐样品在净化氧气氛中的 DTA/TG 曲线特征,拟定共沉淀样品的合理灼烧程序,以防止混合草酸盐样品内部氧化还原的急剧反应,致使部分 Cu~(2+)被还原为 Cu~0,并释放出大量气体。按此法制得的高温超导体样品,经XRD,SEM,TEM,F_C,J_C 测定,说明样品属 YBa_2Cu_3O_(7-x)斜方晶系;而且该样品未经研磨、压片和重新烧结,T_C 即已达到 91K,说明本方法具有一定的实用意义。 相似文献
34.
以程序升温气相色谱为主要分析手段,配合红外、差热热重、化学分析等方法系统地研究重稀土草酸盐水合物在氢气气氛中热分解机理及热分解规律 相似文献
35.
研究了锌(Ⅱ)-草酸盐-水杨基荧光酮(SAF)-溴化十六烷基三甲铵(CTMAB)体系形成四元混配络合物的显色反应条件,在pH9.0的硼砂-HCl缓冲溶液中,形成摩尔比为Zn(Ⅱ):C2O4^2-:SAF:CTMAB=1:1:2:4的紫红色络合物,络合物的最大吸收波长为λmax=560nm、表观摩尔吸收系数ε560为1.1×10^5L·mol^-1·cm^-1,锌(Ⅱ)含量在0 ̄8μg/25mL范围 相似文献