| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method of measuring precisely a magnesium oxide content and a calcium oxide content in an oxide material, causing cracks or degradation/breakage in a molding, resulting from cubical expansion by a hydration reaction, using an infrared absorption spectrum measuring method. <P>SOLUTION: A pulverized sample of the oxide material is immersed preliminarily into deuterium oxide (D<SB>2</SB>O) or sodium deuteroxide (NaOD) deuterium oxide solution, magnesium oxide (MgO) and calcium oxide (CaO) in the pulverized sample are therein converted respectively into magnesium deuteroxide (Mg(OD)<SB>2</SB>) and calcium deuteroxide (Ca(OD)<SB>2</SB>), an infrared absorption spectrum is measured thereafter, the magnesium oxide content and the calcium oxide content in the pulverized sample of the oxide material are found based on areas or peak heights of infrared absorption peaks in absorption bands resulting from respective deuteroxide groups (O-D) of the magnesium deuteroxide and the calcium deuteroxide in the infrared absorption spectrum. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
