scholarly journals Tests of Cryogenic Fabry–Perot Cavity with Mirrors on Different Substrates

2019 ◽  
Vol 9 (2) ◽  
pp. 230
Author(s):  
Mickail Kuvshinskii ◽  
Sergei Oreshkin ◽  
Sergei Popov ◽  
Valentin Rudenko ◽  
Ivan Yudin ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Calcium Fluoride ◽  
Low Temperatures ◽  
Optical Materials ◽  
Optical Glass ◽  
Temperature Range ◽  
Low Thermal Expansion ◽  
Fabry Perot ◽  
Integral Characteristics ◽  
Birefringence Effect

Experiments were performed with Fabry–Perot optical resonators in vacuum at low temperatures. Mirrors were applied on substrates of various optical materials. An infrared laser with a wavelength of 1.064 microns was used. The pump power at the maximum could reach 450 mW. The evolution of the optical properties of the FP cavity was traced in the temperature range 300–10 K. The main parameters measured were the integral characteristics of the FP resonances–sharpness (finesse) and contrast of interference. Three types of substrates were tested: a sitall, an optical glass with ultra low thermal expansion (ULE); sapphire; and calcium fluoride. During cooling, the degradation of the integral characteristics of the FP cavity was observed for the sitall mirrors due to the loss of the properties of ULE, and for sapphire mirrors due to the birefringence effect. The satisfactory constancy of the integral characteristics of the FP resonator on calcium fluoride was demonstrated in the entire temperature range studied.

scholarly journals Isotropic Low Thermal Expansion over a Wide Temperature Range in Ti1–xZrxF3+x (0.1 ≤ x ≤ 0.5) Solid Solutions

2018 ◽  
Vol 57 (22) ◽  
pp. 14396-14400 ◽  
Author(s):  
Cheng Yang ◽  
Yugang Zhang ◽  
Jianming Bai ◽  
Peng Tong ◽  
Jianchao Lin ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Solid Solutions ◽  
Wide Temperature Range ◽  
Temperature Range ◽  
Low Thermal Expansion

Thermal Expansion of SrZr4-xTix(PO4)6 Ceramics

2018 ◽  
Vol 281 ◽  
pp. 169-174
Author(s):  
Yang Wang ◽  
Yuan Yuan Song ◽  
Yuan Yuan Zhou ◽  
Lu Ping Yang ◽  
Fu Tian Liu
Keyword(s):  
Thermal Expansion ◽  
Relative Density ◽  
Thermophysical Properties ◽  
Sintering Temperature ◽  
Temperature Range ◽  
Thermal Expansion Coefficients ◽  
High Relative Density ◽  
Low Thermal Expansion ◽  
Expansion Coefficients

Low thermal expansion ceramics have been widely applied in multiple fields. In this paper, a series of low thermal expansion ceramics SrZr4-xTix(PO4)6 was prepared and characterized. The SrZr4-xTix(PO4)6 ceramics could be well sintered in the temperature range of 1400~1500 °C. The effect of the addition of Ti substituting Zr and the sintering temperature was studied. The Ceramic with x =0.1 sintered at 1450 °C, the SrZr4-xTix(PO4)6 had a high relative density. The thermal expansion coefficients were about 3.301×10-6 °C-1. It was demonstrated that the microstructure of the SrZr4-xTix(PO4)6 could be altered by adding varying amount of Ti to tailor the thermophysical properties of the material.

scholarly journals Low thermal expansion over a wide temperature range of Zr1-Fe V2-Mo O7 (0 ≤ x ≤ 0.9)

2016 ◽  
Vol 170 ◽  
pp. 162-167 ◽  
Author(s):  
Baohe Yuan ◽  
Xiansheng Liu ◽  
Yanchao Mao ◽  
Junqiao Wang ◽  
Juan Guo ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Wide Temperature Range ◽  
Temperature Range ◽  
Low Thermal Expansion

scholarly journals Negative thermal expansion and anomalies of heat capacity of LuB50 at low temperatures

2015 ◽  
Vol 44 (36) ◽  
pp. 15865-15871 ◽  
Author(s):  
V. V. Novikov ◽  
N. A. Zhemoedov ◽  
A. V. Matovnikov ◽  
N. V. Mitroshenkov ◽  
S. V. Kuznetsov ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Thermal Expansion ◽  
Low Temperatures ◽  
Negative Thermal Expansion ◽  
Temperature Range

Heat capacity and thermal expansion of LuB50 boride were experimentally studied in the 2–300 K temperature range.

ChemInform Abstract: Low Thermal Expansion Behavior and Electrical Conductivity of Mn3(Cu0.5SixGe0.5-x)N at Low Temperatures.

ChemInform ◽  
2011 ◽  
Vol 42 (9) ◽  
pp. no-no
Author(s):  
Rongjin Huang ◽  
Zhixiong Wu ◽  
Xinxin Chu ◽  
Huihui Yang ◽  
Zhen Chen ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Thermal Expansion ◽  
Low Temperatures ◽  
Thermal Expansion Behavior ◽  
Low Thermal Expansion ◽  
Expansion Behavior

Intrinsic zero thermal expansion in cube cyanurate K6Cd3(C3N3O3)4

2019 ◽  
Vol 6 (9) ◽  
pp. 2291-2295 ◽  
Author(s):  
Mingjun Xia ◽  
Fei Liang ◽  
Xianghe Meng ◽  
Yonggang Wang ◽  
Zheshuai Lin
Keyword(s):  
Thermal Expansion ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Broad Temperature Range ◽  
The Novel ◽  
Thermal Expansion Behavior ◽  
Temperature Range ◽  
Low Thermal Expansion ◽  
Expansion Behavior

The novel cubic cyanurate K6Cd3(C3N3O3)4 exhibits zero thermal expansion behavior with a very low thermal expansion coefficient of 0.06 MK−1 in a broad temperature range from 10 to 130 K.

THE THERMAL EXPANSION OF ALKALI HALIDES

1965 ◽  
Vol 43 (10) ◽  
pp. 1853-1866 ◽  
Author(s):  
P. P. M. Meincke ◽  
G. M. Graham
Keyword(s):  
Thermal Expansion ◽  
Low Temperatures ◽  
Linear Thermal Expansion ◽  
Alkali Halides ◽  
Temperature Limit ◽  
Detectable Change ◽  
Fabry Perot ◽  
Interionic Potential ◽  
Best Fit ◽  
Rigid Ion Model

Measurements have been made of the coefficient of linear thermal expansion of NaCl, Nal, KCl, and KBr over the temperature range from 7 °K to 300 °K. The measurements were made by monitoring the changes in length of a Fabry–Perot etalon, whose spacer was of the material being studied, as it slowly warmed from liquid-helium temperatures. The detectable change in length of the 2-in. specimen was about 2 Å. The results are analyzed by reducing them to values of the Grueneisen γ. The temperature variation of γ at high temperatures is used to obtain values of γ (2s), which are compared with new calculations on a rigid-ion model to give the best fit to the Born exponent for the non-Coulomb interionic potential. The data for low temperatures are not sufficiently accurate to justify detailed analysis; there is some indication that the apparent low-temperature limit of γ is, in fact, the value at a minimum.

THERMAL EXPANSION OF SINGLE CRYSTALS OF ZINC AT LOW TEMPERATURES

1965 ◽  
Vol 43 (7) ◽  
pp. 1328-1333 ◽  
Author(s):  
D. A. Channing ◽  
S. Weintroub
Keyword(s):  
Experimental Data ◽  
Thermal Expansion ◽  
Single Crystals ◽  
Low Temperatures ◽  
Linear Thermal Expansion ◽  
Optical Interference ◽  
Temperature Range ◽  
Thermal Expansion Coefficients ◽  
Expansion Coefficients ◽  
Good Agreement

The linear thermal expansion coefficients αψ of two single crystals of Zn of orientations ψ = 10.8° and 63.9 ° with the hexad axis were measured over the temperature range of about 20–270 °K using an absolute Fizeau optical interference technique. The two principal coefficients, [Formula: see text] and [Formula: see text], corresponding to ψ = 0° and 90 ° respectively, were calculated from the Voigt relation, and their values are compared with previously reported experimental data. Above 60 °K there is good agreement with previous work, and below 60 °K the results confirm, in general, the data obtained by McCammon and White. The Grüneisen parameter γ is essentially constant at about 2.1 in the range 100–270 °K, but below 100 °K γ rises appreciably with decreasing temperature and reaches the value of about 3.5 at 20 °K.

Low thermal expansion behavior and electrical conductivity of Mn3(Cu0.5SixGe0.5−x)N at low temperatures

2010 ◽  
Vol 12 (12) ◽  
pp. 1977-1980 ◽  
Author(s):  
Rongjin Huang ◽  
Zhixiong Wu ◽  
Xinxin Chu ◽  
Huihui Yang ◽  
Zhen Chen ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Thermal Expansion ◽  
Low Temperatures ◽  
Thermal Expansion Behavior ◽  
Low Thermal Expansion ◽  
Expansion Behavior

X-ray diffractometry of AlGaAs/GaAs superlattices and GaAs in the temperature range 5–295 K

1989 ◽  
Vol 22 (4) ◽  
pp. 372-375 ◽  
Author(s):  
G. Clec'h ◽  
G. Calvarin ◽  
P. Auvray ◽  
M. Baudet
Keyword(s):  
Thermal Expansion ◽  
Temperature Dependence ◽  
Low Temperatures ◽  
X Ray ◽  
Lattice Constants ◽  
Temperature Range ◽  
Thermal Expansion Coefficients ◽  
Gaas Substrates ◽  
Expansion Coefficients ◽  
Tetrahedrally Bonded

The temperature dependence of the lattice constants of Al x Ga1 − x As/GaAs superlattices MBE-grown on (001) oriented GaAs substrates was determined by X-ray diffractometry. The thermal expansion coefficients of these materials become negative at low temperatures, like that of GaAs and other tetrahedrally bonded covalent solids. The temperature dependence of the stress in these structures was also studied; although its value increases as temperature decreases, strain remains elastic down to 5 K.

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