Negative and zero thermal expansion in α-(Cu2-xZnx)V2O7 solid solutions
- Univ. of Science and Technology Beijing (China). Beijing Advanced Innovation Center for Materials Genome Engineering
- Univ. of Padova (Italy)
- Tianjin Normal Univ. (China); Argonne National Lab. (ANL), Argonne, IL (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
Negative or zero thermal expansion (NTE or ZTE) of materials is intriguing for controllable thermal expansion. In this work, we report a series of orthorhombic α-Cu2-xZnxV2O7 (x = 0, 0.1, 0.2), in which the volumetric coefficients of thermal expansion are successfully tuned from -10.19 × 10-6 K-1 to -1.58 × 10-6 K-1 in the temperature range of 100–475 K by increasing the content of Zn2+. It has been revealed that the transverse vibrations of oxygen bonded with vanadium are dominant in the contraction of the bc plane, leading to the overall volume NTE in α-Cu2V2O7. The introduction of Zn2+ densifies the crystal structure, which is presumed to suppress the space of transverse vibrations and results in the ZTE in α-Cu1.8Zn0.2V2O7. This work presents an effective method to realize ZTE in anisotropic framework systems.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1780663
- Alternate ID(s):
- OSTI ID: 1647263
- Journal Information:
- ChemComm, Journal Name: ChemComm Journal Issue: 73 Vol. 56; ISSN 1359-7345
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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