近零膨胀Zr_(0.5)Hf_(0.5)V_(1.4)P_(0.6)O_(7)材料的制备及其性能研究  

Preparation and Properties of the Near Zero Thermal Expansion of Zr_(0.5)Hf_(0.5)V_(1.4)P_(0.6)O_(7)

作　　者：王俊平[1] 陈庆东[1] 穆文英 梁二军[2] WANG Junping;CHEN Qingdong;MU Wenying;LIANG Erjun(Shandong Engineering Research Center of Aeronautical Materials and Devices,College of Aeronautical Engineering,Binzhou University,Binzhou 256603,China;Key Laboratory of Materials Physics of Ministry of Education,School of Physical Science and Engineering,Zhengzhou University,Zhengzhou 450052,China)

机构地区：[1]滨州学院,山东省航空材料与器件工程技术研究中心,滨州256603 [2]郑州大学物理工程学院,材料物理教育部重点实验室,郑州450052

出　　处：《人工晶体学报》2022年第1期148-153,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(U1731121,11874328);滨州学院博士科研启动基金(2021Y11,2016Y04)。

摘　　要：采用传统的固相法合成了近零膨胀氧化物功能陶瓷材料Zr_(0.5)Hf_(0.5)V_(1.4)P_(0.6)O_(7),用X射线衍射(XRD)、Raman光谱和热膨胀法对Zr_(0.5)Hf_(0.5)V_(1.4)P_(0.6)O_(7)的热膨胀系数、各向同性和相变进行了测试,通过Hf^(4+)/P^(5+)共掺杂使得材料具有较低的热膨胀系数,研究发现合成的Zr_(0.5)Hf_(0.5)V_(1.4)P_(0.6)O_(7)具有Pa 3立方相结构,从334 K附近到673 K较宽的温度范围内的线性热膨胀系数为-1.56×10^(-6) K^(-1),表现出稳定的近零热膨胀特性。由于固溶体内部微结构的影响造成膨胀仪实验结果与变温X射线衍射结果存在一定的差距。Zr_(0.5)Hf_(0.5)V_(1.4)P_(0.6)O_(7)具有的近零膨胀特性为通过负热膨胀材料合成膨胀系数可控的材料提供了基础。Near zero expansion oxide functional ceramics Zr_(0.5)Hf_(0.5)V_(1.4)P_(0.6)O_(7) was synthesized by the traditional solid-state method and then the thermal expansion properties of the synthesized samples were explored.X-ray diffraction(XRD),Raman spectra and thermal dilatometry were used to investigate the coefficient of thermal expansion(CTE),isotropy and phase transition of Zr_(0.5)Hf_(0.5)V_(1.4)P_(0.6)O_(7).Hf^(4+)/P^(5+)double ion doping results in the material has smaller coefficient of thermal expansion.The investigation results show that the samples are single cubic phase with the space group of Pa3 in the crystal structure.The linear expansion coefficient of Zr_(0.5)Hf_(0.5)V_(1.4)P_(0.6)O_(7) is calculated to be-1.56×10^(-6) K^(-1) in the temperature range from 334 K to 673 K and has near-zero thermal expansion characteristic in a wide temperature range.Due to the influence of the internal microstructure of the solid solution,there is a certain gap between the expansion test results and the X-ray diffraction results at variable temperature.The near zero thermal expansion(NZTE)property of Zr_(0.5)Hf_(0.5)V_(1.4)P_(0.6)O_(7) provides a basis for the synthesis of materials with controllable expansion coefficient of negative thermal expansion materials.

关 键 词：近零膨胀 Zr_(0.5)Hf_(0.5)V_(1.4)P_(0.6)O_(7) 相变 热膨胀系数 各向同性 固相法 拉曼光谱 

分 类 号：TQ174.1[化学工程—陶瓷工业]