物理吸附测量的实验技术

<p style="margin: 0px auto; padding: 0px; box-sizing: border-box; font-size: 14px; color: #333333; line-height: 2.2; letter-spacing: 0.5px; font-family: 宋体, Tahoma, Arial; background-color: #ffffff;"><span style="font-size: 14pt;"><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;"><span style="color: #236fa1;"><strong><a style="color: #236fa1;" href="https://www.kexingtest.com/makings?nav_cate=95" target="_blank" rel="noopener">物理吸附分析</a></strong></span>主要测量的是在一定温度下，样品吸附量与压力的关系，即吸附等温曲线。吸附</span></span><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;">量作为压力的函数可以由体积测量法（容量法）和重量分析法实现。</span></span></span></p> <p style="margin: 0px auto; padding: 0px; box-sizing: border-box; font-size: 14px; color: #333333; line-height: 2.2; letter-spacing: 0.5px; font-family: 宋体, Tahoma, Arial; background-color: #ffffff;"> </p> <p style="margin: 0px auto; padding: 0px; box-sizing: border-box; font-size: 14px; color: #333333; line-height: 2.2; letter-spacing: 0.5px; font-family: 宋体, Tahoma, Arial; background-color: #ffffff;"><span style="font-size: 14pt;"><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;">1)</span></span><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;">重量分析法是由一个灵敏的微量天平和一个压力传感器构成，可以直接测量吸附量，但是</span></span><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;">需要做浮力修正（而浮力是无法直接测量的）。重量分析法在以室温为中心的不太大的温度</span></span><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;">范围内进行时，是一种很方便的研究方法。</span></span></span></p> <p style="margin: 0px auto; padding: 0px; box-sizing: border-box; font-size: 14px; color: #333333; line-height: 2.2; letter-spacing: 0.5px; font-family: 宋体, Tahoma, Arial; background-color: #ffffff;"> </p> <p style="margin: 0px auto; padding: 0px; box-sizing: border-box; font-size: 14px; color: #333333; line-height: 2.2; letter-spacing: 0.5px; font-family: 宋体, Tahoma, Arial; background-color: #ffffff;"><span style="font-size: 14pt;"><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;">在重量法中，吸附质不能与温度调节装置直接相连，所以无论在低温或高温，都不容</span></span><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;">易控制和测量吸附质的真实温度。因此，在液氮温度下（77.35K）或液氩温度（87.27K）</span></span><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;">下测量氮气、氩气和氪气吸附主要依靠体积测量法。</span></span></span></p> <p style="margin: 0px auto; padding: 0px; box-sizing: border-box; font-size: 14px; color: #333333; line-height: 2.2; letter-spacing: 0.5px; font-family: 宋体, Tahoma, Arial; background-color: #ffffff;"> </p> <p style="margin: 0px auto; padding: 0px; box-sizing: border-box; font-size: 14px; color: #333333; line-height: 2.2; letter-spacing: 0.5px; font-family: 宋体, Tahoma, Arial; background-color: #ffffff;"><span style="font-size: 14pt;"><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;">2)</span></span><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;">体积测量法即真空容量法，是基于被校准过的体积和压力，利用总气量守恒实现的。利用</span></span><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;">进入样品管的总气体量和自由空间中的气体量的差值计算出吸附量。</span></span></span></p> <p style="margin: 0px auto; padding: 0px; box-sizing: border-box; font-size: 14px; color: #333333; line-height: 2.2; letter-spacing: 0.5px; font-family: 宋体, Tahoma, Arial; background-color: #ffffff;"> </p> <p style="margin: 0px auto; padding: 0px; box-sizing: border-box; font-size: 14px; color: #333333; line-height: 2.2; letter-spacing: 0.5px; font-family: 宋体, Tahoma, Arial; background-color: #ffffff;"><span style="font-size: 14pt;"><span style="margin: 0px; padding: 0px; box-sizing: border-box;"><span style="margin: 0px; padding: 0px; box-sizing: border-box; color: #000000;">有吸附类测试需求（</span></span></span><span style="color: #212529; font-family: 'Noto Sans SC'; font-size: 16px; text-align: center; text-wrap: nowrap;">热分析联用、</span><span style="color: #212529; font-family: 'Noto Sans SC'; font-size: 16px; text-align: center; text-wrap: nowrap;">全自动高压吸附仪、</span><span style="color: #212529; font-family: 'Noto Sans SC'; font-size: 16px; text-align: center; text-wrap: nowrap;">水蒸气吸附、</span><span style="color: #212529; font-family: 'Noto Sans SC'; font-size: 16px; text-align: center; text-wrap: nowrap;">压汞仪、</span><span style="color: #212529; font-family: 'Noto Sans SC'; font-size: 16px; text-align: center; text-wrap: nowrap;">化学吸附分析仪、</span><span style="color: #212529; font-family: 'Noto Sans SC'; font-size: 16px; text-align: center; text-wrap: nowrap;">物理吸附等</span><span style="color: #000000; font-size: 14pt;">），可联系科兴测试平台送检。</span></p> <p style="margin: 0px auto; padding: 0px; box-sizing: border-box; font-size: 14px; color: #333333; line-height: 2.2; letter-spacing: 0.5px; font-family: 宋体, Tahoma, Arial; background-color: #ffffff;"> </p>