The composite silica microsphere was obtained through the polymerization of urea and formaldehyde occurred in the silica sol that prepared from the hydrolyzation of tetraethyl orthosilicate.
以甲醛与尿素作为单体在正硅酸乙酯水解所得的氧化硅溶胶中进行聚合反应制得了有机—无机二氧化硅复合微球。
By using cobalt nitrate, strontium nitrate and urea as initiative materials, the precursor of cobalt oxide was prepared by Sol-hydrothermal synthesis.
采用硝酸钴、硝酸锶及尿素为原料，通过溶胶-水热合成方法制备出掺锶钴氧化物前驱体。
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