Upgraded ISRM Suggested Method for Determining Sound Velocity by Ultrasonic Pulse Transmission Technique

2013 ◽  
pp. 95-99 ◽  
Author(s):  
Adnan Aydin
Keyword(s):  
Sound Velocity ◽  
Ultrasonic Pulse ◽  
Suggested Method ◽  
Pulse Transmission ◽  
Transmission Technique ◽  
Ultrasonic Pulse Transmission

Electrical and Elastic Behavior of In and Al Substituted Mg-Mn Ferrites

1998 ◽  
Vol 12 (22) ◽  
pp. 2247-2262 ◽  
Author(s):  
Y. Purushotham ◽  
Mahavir Singh ◽  
S. P. Sud ◽  
P. Venugopal Reddy
Keyword(s):  
Electrical Conductivity ◽  
Room Temperature ◽  
Elastic Moduli ◽  
Ultrasonic Pulse ◽  
Elastic Behavior ◽  
Pulse Transmission ◽  
Transmission Technique ◽  
Ultrasonic Pulse Transmission ◽  
Curie Temperatures ◽  
Suitable Explanation

Thermopower and electrical conductivity studies of polycrytslline In 3+ and Al 3+ substituted Mg-Mn ferrites having different compositions were undertaken in the temperature range 300–700 K, using differential and two-probe methods respectively. It has been observed that all the ferrites are found to exhibit clear and well-defined transtions near their respective Curie temperatures in both Seebeck coefficient and electrical conductivity versus temperature behavior. The elastic behavior of these ferrites has also been studied as a function of composition at room temperature using ultrasonic pulse transmission technique and it has been found that the elastic moduli decrease continuously with increasing Indium concentration and increase with increasing Aluminium dopants. Suitable explanation for the observed phenomena are given.

scholarly journals Composition Dependence of Elastic Moduli of Mixed Cobalt-Zinc Ferrites Prepared by Citrate Precursor Method

2019 ◽  
Vol 32 (1) ◽  
pp. 31-35
Author(s):  
Ch. Vinuthna ◽  
Sandupatla Raju ◽  
D. Ravinder
Keyword(s):  
Synthesis Method ◽  
Ultrasonic Pulse ◽  
Elastic Module ◽  
Pulse Transmission ◽  
Precursor Synthesis ◽  
Rigidity Modulus ◽  
Binding Forces ◽  
Ultrasonic Pulse Transmission ◽  
Elastic Modules ◽  
Citrate Precursor

CoxZn1-xFe2O4 nanoparticles were prepared by chemical citrate precursor synthesis method. The Young’s modulus ‘E’ and the rigidity modulus ‘n’ of mixed cobalt-zinc ferrites have been determined by the ultrasonic pulse transmission technique at 1 MHz. The elastic modules of the ferrites were corrected to zero porosity using the formulae of Harselman and Fulrath. The observed variation of the elastic module with composition has been interpreted on the basis of binding forces between the atoms of the spinal lattice. A linear relationship between Debye temperature ØD and average sound velocity Vm has also been observed.

ELASTIC BEHAVIOR OF Pr SUBSTITUTED Y-123 SUPERCONDUCTING MATERIALS

2006 ◽  
Vol 20 (14) ◽  
pp. 843-847 ◽  
Author(s):  
B. N. DOLE ◽  
Y. PURUSHOTHAM ◽  
P. VENUGOPAL REDDY ◽  
S. S. SHAH
Keyword(s):  
High Temperature ◽  
Linear Relationship ◽  
Sound Velocity ◽  
Room Temperature ◽  
Elastic Moduli ◽  
High Temperature Superconductors ◽  
Elastic Behavior ◽  
Wave Velocities ◽  
Pulse Transmission ◽  
Transmission Technique

The longitudinal (Vl) and shear (Vs) wave velocities of Praseodymium substituted YB 2 Cu 3 O 7-δ high temperature superconductors were determined at room temperature by the pulse transmission technique. The values of Young's (E), rigidity (n) and bulk (k) moduli have been corrected to zero porosity. The zero porous corrected values of the elastic moduli are found to increase with increasing Praseodymium concentration. A linear relationship between the Debye temperature (θD) and average sound velocity (Vm) has also been observed and the behavior is explained qualitatively.

Wave velocities in hydrocarbon‐saturated rocks: Experimental results

Geophysics ◽  
1990 ◽  
Vol 55 (6) ◽  
pp. 723-733 ◽  
Author(s):  
Z. Wang ◽  
A. Nur
Keyword(s):  
Oil Recovery ◽  
High Frequency ◽  
Ultrasonic Pulse ◽  
Heavy Oils ◽  
Saturated Sand ◽  
Temperature Changes ◽  
Wave Velocities ◽  
Recovery Processes ◽  
Pulse Transmission ◽  
Ultrasonic Pulse Transmission

This paper contains laboratory measurements of the temperature dependence of velocities, determined by ultrasonic pulse transmission methods, in hydrocarbon liquids and rock samples saturated by the liquids. The samples discussed include 26 hydrocarbons of varying molecular weight, nine mixtures of these hydrocarbons, four heavy oils (tar), three saturated sandstones, and a saturated sand. The data provide encouragement that high‐frequency, high‐resolution seismic techniques may infer formation temperature changes, thereby detecting the progress of thermal enhanced oil recovery processes.

Sign in / Sign up

Export Citation Format

Share Document