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structure. When the calcination temperature is above 1000 ℃,Sr2CeO4 partly decomposes into SrCeO3. SEM studies show that the particles of Sr2CeO4 obtained at 900 ℃ are sphericallike shape... spectrum shows a broad band with a peak around 470 nm,which can be assigned to the f→t1g transition of Ce4 + . It is found that the emission intensity is affected by the calcination temperature. Key......
such as stirring velocity, precipitation temperature, feeding speed, aging time, precipitation method, and calcination temperature on particle size and loose density of CeO2 were studied. Under the particular......
with measurement of relative density of CeO2 nanocrystalline powders. The results indicate that the grain size of CeO2 nanocrystallites increases sharply with the increase of calcination temperature... decrease, and the relative density increases remarkably with the rise of calcinations degree of the responding powders. At lower temperature (e.g. 300℃) , calcination time makes no obvious influence......
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Aluminum Company Limited, Honghe 661400, China Received 18 February 2020; accepted 28 October 2020 Abstract: With the TiB2-SiC powders after spray granulation and vacuum calcination as raw materials... and the fabrication processing of SAPS was optimized. The results show that the sprayed powders after calcination have a uniform particle size distribution, good sphericity and enhanced fluidity......
; 文献标志码:A 文章编号:1672-7207(2015)07-2419-07 Physicochemical and calcination characteristics of manganese... according to calcination temperature, that is, low-temperature stage (below 300 ℃, mass concentration of manganese ion is 0.6-1.0 g/L), middle-temperature stage (between 400 ℃ to 700 ℃, mass......
affects the structure transformation of kaolinite and activity of calcination kaolinite. The structure transformation for calcined kaolinite is undergone some stages including kaolinite dehydroxylation...; calcination; activity; structure transition; geopolymer 高岭石是一种层状结构的铝硅酸盐粘土矿物,原矿高岭石并不具备制备矿物聚合材料所需的火山灰活性,要使之获得活性,必须对它进行活化处理[1-2].处理方法是对高岭石进行煅烧,使高岭石脱去其铝氧八面体中的-OH,改变Al的配位数,使原来为有序结构的高岭石变成无序结构的偏高岭石以获得活性[3].煅烧高岭石的活性取......
:A Properties of Li4Ti5O12 synthesized by two-step calcination SONG Hai-shen1, LI Tao1, GAO Hong-quan1, 2, ZHANG Zhi-an1, LAI Yan-qing1, LI Jie1, LIU Ye-xiang1 (1. School of Metallurgical Science..., then Li4Ti5O12 materials was prepared by two step calcination process. The effects of the synthesizing conditions on the crystalline structure, morphology and electrochemical properties were studied by XRD......