NOPR Community:

Spectroscopic studies on triply ionised Sm in fluorophosphate glasses

2016-07-20T05:31:39Z

Title: Spectroscopic studies on triply ionised Sm in fluorophosphate glasses Authors: Sharma, Brajesh; Rai, S B; Rai, D K; Buddhudu, S Abstract: Visible absorption and Ar⁺ laser induced fluorescence spectrum has been studied for triply ionised Sm doped in a series of new fluorophosphates glasses The chemical composition of these glasses( in mol percent) is 55% (NaPO₃)₆, 19% BaF₂, 5% ZnF₂, 20% AF and 1% SmF₃, where AF=LiF, NaF, KF, LiF+NaF, NaF + KF and KF + LiF. The measured oscillator strengths have been used to evaluate the Judd-Ofelt intensity parameters and radiative properties. The stimulated emission cross-sections for the following four transition ⁴G_5/2 →⁶H_{5/2,7/2,9/2,11/2}has been estimated. Page(s): 297-302

Thermal conductivity of V₂O₅-P₂O₅ glasses

2016-07-20T05:39:34Z

Title: Thermal conductivity of V₂O₅-P₂O₅ glasses Authors: Gawande, W J; Pakade, S V; Yawale, S P Abstract: The thermal conductivity of V₂O₅-P₂O₅ glass system has been experimentally determined in the temperature range 303-422 K. The data covered the glass composition range from 60 to 80 mol% of V₂O₅. It has been observed that the thermal conductivity increases linearly with temperature. The results obtained confirmed that the major contribution to the thermal conductivity of this glass system is due to lattice vibrations. The values of density, molar volume, lattice thermal conductivity (λ_L) band gap energy, melting temperature, electronic (λ_e) and bipolar component of thermal conductivity (λ_bp) are also reported. Page(s): 291-296

Surveillance and calibration of standard resistors at a Metrological laboratory

2016-07-20T05:38:29Z

Title: Surveillance and calibration of standard resistors at a Metrological laboratory Authors: Husain, Rahat Abstract: The paper presents a metrological technique for surveillance and calibration of similar standard resistors taken in group, at laboratories ranked next to the national level laboratories, based on calculation of eigen values and eigen vector of the measurement data matrix. The technique employs the various cross-products of measurement ratio data and provides a new mean of group calibration. Page(s): 286-290

On the characterisation of ultrasonic response curves for joint strength correlation

2016-07-20T05:37:30Z

Title: On the characterisation of ultrasonic response curves for joint strength correlation Authors: Mitra, Rupa Abstract: The present study is primarily aimed at searching for a single parameter in terms of which transducer response for different bond strength can be distinguished. Validity of the application of such a parameter is examined by computing its percentage variation for two different strength of each of two adhesives used for joint formation. Computed values of transducer (electrical) parameters in this process agree with the corresponding measured values. Page(s): 281-285

NOPR Community:

Spectroscopic studies on triply ionised Sm in fluorophosphate glasses

Thermal conductivity of V2O5-P2O5 glasses

Surveillance and calibration of standard resistors at a Metrological laboratory

On the characterisation of ultrasonic response curves for joint strength correlation

Thermal conductivity of V₂O₅-P₂O₅ glasses