Ensure words are spelled correctly. Try rephrasing keywords or using synonyms. Try less specific keywords. Make your queries as concise as possible.
采用XPS、XAS和XAFS等多种不同深度的探测方式对颗粒进行层层剖析,得到的Ce3+/Ce4+的比值还原了材料中的径向介电梯度变化,阐明了“低价态外壳 ...