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百度
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维基
百科
线热膨胀 [xiàn rè péng zhàng]
linear thermal expansion
- 摘要将原子间相互作用势的非谐项作为微扰，运用声子数表象中的晶格原子振动位移和晶格振动哈密顿公式，推导了纳米晶体线的热膨胀系数公式，并进行了数值计算。
Treating the anharmonic terms of potential energy as perturbations, and employing the formulas for atomic displacements and Hamiltonian in phonon occupation number representation, the formulas for thermal expansion coefficients of crystal nano-wires are derived and the numerical calculations are carried out in this paper. - 研究结果表明，纳米晶体线越细，其热膨胀系数越大。
The results show that the thinner crystal nano-wire has a larger thermal expansion coefficient. - 摘要在迈克耳孙干涉原理的两条干涉光路中，分别设置可以精确测量金属丝的拉伸长度和金属棒热膨胀伸长量的装置，从而设计出一种可以分别测量金属杨氏模量和线胀系数的新型综合实验仪器。
Based on the principle of Michelson interference a new integrative experiment apparatus to measure linear expansion coefficient and Yang's modulus of metals is designed and manufactured primarily.
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