Material Specification for Dy:123; [Dy-Ba-Cu-O]
Process: Solid State Reaction
Notes: The authors cite J. Chmist et al., Progress High Temp. Supercond., Vol. 24, 317 (1990), and summarize the procedure as follows. "The specimen was prepared by the standard ceramic procedure but special care was taken to get material as homogenized as possible by regrinding the material several times extra, followed by sintering at 950 °C."
Formula: DyBa2Cu3O7
Informal Name: Dy:123
Chemical Family: Dy-Ba-Cu-O
Chemical Class: Oxide
Structure Type:
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Critical Temperature for Dy:123; [Dy-Ba-Cu-O]
| Critical Temperature (K) |
| 91.4±0.1 |
Measurement Method: Calorimetry method
"... the disc-like shaped specimen of about 500 mg was glued to the thin sapphire calorimeter with a small amount of Apiezon N grease as a contact thermal medium. The specific heat capacity was measured... making use of the platinum thin film Pt-100 thermometer and the Ni-Cr thin film heater. The accuracy of temperature was better than ±0.05 K... The measurements were carried out by both the standard semi-adiabatic heat-pulse technique and the continuous heating technique. In the adiabatic method the temperature increment of the given temperature was about 0.7 K at the lowest temperatures and about 1.7 K at the highest temperatures while the heat-pulse time was from 20 s to 100 s, respectively. In the continuous heating method the heating power was chosen such that the heating rate was about 0.5 K per minute."
Cautions: Evaluated Data
Specific Heat for Dy:123; [Dy-Ba-Cu-O]
| Temperature (K) |
Specific Heat (J kg-1 K-1) |
| 56 |
95 |
| 60 |
108 |
| 70 |
131 |
| 90 |
179 |
| 93 |
179 |
| 109 |
206 |
| 127 |
237 |
| 141 |
258 |
| 161 |
282 |
| 181 |
301 |
| 212 |
322 |
| 222 |
328 |
| 237 |
335 |
| 250 |
342 |
Measurement Method: Calorimetry method
"... the disc-like shaped specimen of about 500 mg was glued to the thin sapphire calorimeter with a small amount of Apiezon N grease as a contact thermal medium. The specific heat capacity was measured... making use of the platinum thin film Pt-100 thermometer and the Ni-Cr thin film heater. The accuracy of temperature was better than ±0.05 K... The measurements were carried out by both the standard semi-adiabatic heat-pulse technique and the continuous heating technique. In the adiabatic method the temperature increment of the given temperature was about 0.7 K at the lowest temperatures and about 1.7 K at the highest temperatures while the heat-pulse time was from 20 s to 100 s, respectively. In the continuous heating method the heating power was chosen such that the heating rate was about 0.5 K per minute."
Cautions: Evaluated Data
"Digitized data were obtained from Figure 2 of the paper.
