【摘 要】
：
ZrW2O8是一种典型的负热膨胀材料.由于其在较大的温度区间(0.3 K-1050 K)表现出各向同性负热膨胀效应,且具有较大的负热膨胀系数(-8.7×10-6 K-1),故自1996年,Sleight课题组
【机 构】
：
北京科技大学,冶金与生态工程学院,北京,100083CenterforNeutronResearch,NationalInstituteofStandardsandTechnology(NIST),G
【出 处】
：
第十二届全国X射线衍射学术大会暨国际衍射数据中心(ICDD)研讨会
论文部分内容阅读
ZrW2O8是一种典型的负热膨胀材料.由于其在较大的温度区间(0.3 K-1050 K)表现出各向同性负热膨胀效应,且具有较大的负热膨胀系数(-8.7×10-6 K-1),故自1996年,Sleight课题组对其负热膨胀性进行了系统的报道后,人们对其的研究热度持续至今.[1]-[3]但是人们对ZrW2O8掺杂改性方面的研究主要集中在A位(Sc,Y,In,Lu,Er,Sn,Ti,Hf)和B位(Mo,V)的化学替代方面,而忽略了ZrW2O8的结构为框架结构,其具有较大的晶格间隙,拥有小分子插入改性的潜力.本文就是利用氨化作用,开辟了一个对ZrW2O8改性调控的新方向.小分子NH3通过氨化作用进入晶格间隙,并与W成键.
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