scholarly journals Optical, thermal, strength properties and SHG efficiency of KDP single crystals doped with N,N′-dimethyl urea

2018 ◽  
Vol 25 (1) ◽  
pp. 034-042
Author(s):  
E.I. Kostenyukova ◽  
Keyword(s):  
Single Crystals ◽  
Strength Properties ◽  
Thermal Strength ◽  
Dimethyl Urea ◽  
Shg Efficiency

Investigation on the structural, linear/nonlinear optical and electrical characteristics of Cd- and Mn-doped polar lithium sulfate monohydrate crystals

2017 ◽  
Vol 41 (20) ◽  
pp. 12259-12267 ◽  
Author(s):  
A. Silambarasan ◽  
P. Rajesh ◽  
Rajeev Bhatt ◽  
Indranil Bhaumik ◽  
K. K. Maurya ◽  
...  
Keyword(s):  
Single Crystals ◽  
Nonlinear Optical ◽  
Piezoelectric Response ◽  
Lithium Sulfate ◽  
Electrical Characteristics ◽  
Shg Efficiency ◽  
Mn Doped

Doped LSMH single crystals exhibited good transmittance percentage, lower birefringence, enhanced SHG efficiency and good piezoelectric response compared to undoped LSMH crystals.

scholarly journals Эффективные кристаллы Bi-Sb для термоэлектрического охлаждения при температурах T≲180 K

2019 ◽  
Vol 53 (5) ◽  
pp. 693
Author(s):  
Н.А. Сидоренко ◽  
З.М. Дашевский
Keyword(s):  
Hydrostatic Pressure ◽  
Single Crystals ◽  
High Hydrostatic Pressure ◽  
Polycrystalline Material ◽  
High Strength ◽  
Strength Properties ◽  
Experimental Equipment ◽  
Liquid Environment

Methods of extrusion are widely used in technology of thermoelectric (TE) materials manufacturing with high strength and good TE properties at temperatures above 200 K. The method of extrusion of Bi - Sb single crystals in the liquid environment under high hydrostatic pressure is considered. The construction of experimental equipment is presented. It was shown that presented method of extrusion allows preparing of polycrystalline material with high TE and improved strength properties at temperatures below 180 K.

scholarly journals Linear and Nonlinear Optical Constants of Potassium Acid Phthalate crystal

2018 ◽  
Vol 10 (3) ◽  
pp. 97
Author(s):  
Arun Kuzhivelil Joseph ◽  
S Jayalekshmi
Keyword(s):  
Single Crystals ◽  
Nonlinear Optical ◽  
Optical Constants ◽  
Potassium Hydrogen Phthalate ◽  
Hydrogen Phthalate ◽  
Third Order ◽  
Potassium Hydrogen ◽  
Potassium Acid Phthalate ◽  
Shg Efficiency ◽  
Acid Phthalate

Single crystals of potassium hydrogen phthalate (KAP) are grown by solution growth technique. Linear optical constants are evaluated from UV/VIS/NIR spectrum. The Z scan technique is used to elucidate the third order nonlinearity in the material. The results indicate that the compound exhibits reverse saturable absorption (RSA) and self-defocusing performance. The second harmonic generation (SHG) efficiency of the crystal evaluated by Kurtz and Perry technique is compared with that of the standard KDP crystal. Attempt is made to correlate the SHG efficiency with the crystalline perfection in the material. Full Text: PDF ReferencesMiniewicz.A, Barkiewics.S, "On the electro‐optic properties of single crystals of sodium, potassium and rubidium acid phthalates", Adv.Mat.Opt.Elect,2,157(1993). CrossRef Comeretto.D, Rosy.L, "Optical properties of potassium acid phthalate", J.Mat.Res, 12, 1262(1997). CrossRef Krajewski.T, Breczewski.T, "Dielectric and pyroelectric properties of TGS crystals doped with nitroaniline molecules", Ferroelectrics, 25, 547 (1980). CrossRef N. Kejalakshmy, K. Srinivasan, "Growth, optical and electro-optical characterisations of potassium hydrogen phthalate crystals doped with Fe3+ and Cr3+ ions", Opt. Mater. 27,389–394A, (2004). [5] CrossRef Ester. G.R, Price.R, Halfpenny. P.J, "An atomic force microscopic investigation of surface degradation of potassium hydrogen phthalate (KAP) crystals caused by removal from solution", J.Cryst.Growth, 182, 95(1998). CrossRef Hiroyuki Toda, Carl M. Verber "Simple technique to reveal a slow nonlinear mechanism in a z-scanlike n2 measurement", Opt. Lett. 17(19) 1379(1992). CrossRef K.J. Arun, S.Jayalekshmi, "Investigations on the nonlinear optical properties of glycinium oxalate single crystals", Optoelectron. Lett. 7(2), 136, (2011). CrossRef K.J.Arun, S.Jayalekshmi, "Third order nonlinear optical constants of L-alaninium oxalate", Phot. Lett. Poland 7(3), 81-83 (2015) CrossRef

scholarly journals Влияние низкотемпературной термообработки на развитие сверхэластичности в монокристаллах Ti-50.6 at.% Ni

2019 ◽  
Vol 45 (3) ◽  
pp. 55
Author(s):  
Е.Е. Тимофеева ◽  
Н.Ю. Суриков ◽  
А.И. Тагильцев ◽  
А.С. Ефтифеева ◽  
А.Б. Тохметова ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Low Temperature ◽  
Single Crystals ◽  
High Strength ◽  
Strength Properties ◽  
Martensite Formation ◽  
Nanoscale Particles ◽  
Low Temperature Aging ◽  
Temperature Aging

AbstractAs a result of low-temperature aging at 573 K for 1.5 h of Ti–50.6 at% Ni [001]-oriented single crystals quenched from 1253 K, a high-strength state is obtained due to the precipitation of Ti_3Ni_4 nanoscale particles ( d < 10 nm). The aging leads to the development of the B 2– B 19' martensitic transformation through an intermediate R phase, a reduction in the B 19' martensite formation temperatures by 40–60 K, an increase in the strength properties of the B 2 phase from 730 to 2100 MPa, and an extension of the superelasticity interval Δ T _SE in compression from Δ T _SE = 60 to 170 K (compared to quenched crystals).

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