Kinetic analysis of superconducting YBa2O7, by thermogravimetry in high vacuum

Kenzo Nagase, Hiroko Yokobayashi, Masae Kikuchi, Ayako Yamamoto, Yasuhiko Syono, Yoshiyuki Morioka

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Superconducting YBa2Cu3O7, was subjected to high vacuum thermogravimetry (TG) at various heating rates in the range from room temperature to 1000°C. Two distinct weight-loss steps, each of which corresponds to the evolution of almost 1/202, were observed on the TG curve. The product following the first step was apparently the non-stoichiometric compound YBa2Cu3O7-δ. The rate equation for the first step was dδ/dt = k(1-δ); the corresponding specific rate constant, k, was 1.8 × 10-3 s-1 at 490°C, the activation energy, Ea, was 75 kJ mol-1 and the frequency factor, A, was 3.0 × 102 s-1.

Original languageEnglish
Pages (from-to)207-213
Number of pages7
JournalThermochimica Acta
Volume175
Issue number2
DOIs
Publication statusPublished - 1991 Mar 15
Externally publishedYes

Fingerprint

high vacuum
thermogravimetry
Thermogravimetric analysis
Vacuum
Kinetics
kinetics
Heating rate
Rate constants
Activation energy
activation energy
heating
room temperature
curves
products
Temperature
barium copper yttrium oxide

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Kinetic analysis of superconducting YBa2O7, by thermogravimetry in high vacuum. / Nagase, Kenzo; Yokobayashi, Hiroko; Kikuchi, Masae; Yamamoto, Ayako; Syono, Yasuhiko; Morioka, Yoshiyuki.

In: Thermochimica Acta, Vol. 175, No. 2, 15.03.1991, p. 207-213.

Research output: Contribution to journalArticle

Nagase, K, Yokobayashi, H, Kikuchi, M, Yamamoto, A, Syono, Y & Morioka, Y 1991, 'Kinetic analysis of superconducting YBa2O7, by thermogravimetry in high vacuum', Thermochimica Acta, vol. 175, no. 2, pp. 207-213. https://doi.org/10.1016/0040-6031(91)80067-S
Nagase, Kenzo ; Yokobayashi, Hiroko ; Kikuchi, Masae ; Yamamoto, Ayako ; Syono, Yasuhiko ; Morioka, Yoshiyuki. / Kinetic analysis of superconducting YBa2O7, by thermogravimetry in high vacuum. In: Thermochimica Acta. 1991 ; Vol. 175, No. 2. pp. 207-213.
@article{0660a9e8bc0a41cfb9f4090b502f3801,
title = "Kinetic analysis of superconducting YBa2O7, by thermogravimetry in high vacuum",
abstract = "Superconducting YBa2Cu3O7, was subjected to high vacuum thermogravimetry (TG) at various heating rates in the range from room temperature to 1000°C. Two distinct weight-loss steps, each of which corresponds to the evolution of almost 1/202, were observed on the TG curve. The product following the first step was apparently the non-stoichiometric compound YBa2Cu3O7-δ. The rate equation for the first step was dδ/dt = k(1-δ); the corresponding specific rate constant, k, was 1.8 × 10-3 s-1 at 490°C, the activation energy, Ea, was 75 kJ mol-1 and the frequency factor, A, was 3.0 × 102 s-1.",
author = "Kenzo Nagase and Hiroko Yokobayashi and Masae Kikuchi and Ayako Yamamoto and Yasuhiko Syono and Yoshiyuki Morioka",
year = "1991",
month = "3",
day = "15",
doi = "10.1016/0040-6031(91)80067-S",
language = "English",
volume = "175",
pages = "207--213",
journal = "Thermochimica Acta",
issn = "0040-6031",
publisher = "Elsevier",
number = "2",

}

TY - JOUR

T1 - Kinetic analysis of superconducting YBa2O7, by thermogravimetry in high vacuum

AU - Nagase, Kenzo

AU - Yokobayashi, Hiroko

AU - Kikuchi, Masae

AU - Yamamoto, Ayako

AU - Syono, Yasuhiko

AU - Morioka, Yoshiyuki

PY - 1991/3/15

Y1 - 1991/3/15

N2 - Superconducting YBa2Cu3O7, was subjected to high vacuum thermogravimetry (TG) at various heating rates in the range from room temperature to 1000°C. Two distinct weight-loss steps, each of which corresponds to the evolution of almost 1/202, were observed on the TG curve. The product following the first step was apparently the non-stoichiometric compound YBa2Cu3O7-δ. The rate equation for the first step was dδ/dt = k(1-δ); the corresponding specific rate constant, k, was 1.8 × 10-3 s-1 at 490°C, the activation energy, Ea, was 75 kJ mol-1 and the frequency factor, A, was 3.0 × 102 s-1.

AB - Superconducting YBa2Cu3O7, was subjected to high vacuum thermogravimetry (TG) at various heating rates in the range from room temperature to 1000°C. Two distinct weight-loss steps, each of which corresponds to the evolution of almost 1/202, were observed on the TG curve. The product following the first step was apparently the non-stoichiometric compound YBa2Cu3O7-δ. The rate equation for the first step was dδ/dt = k(1-δ); the corresponding specific rate constant, k, was 1.8 × 10-3 s-1 at 490°C, the activation energy, Ea, was 75 kJ mol-1 and the frequency factor, A, was 3.0 × 102 s-1.

UR - http://www.scopus.com/inward/record.url?scp=0039256879&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0039256879&partnerID=8YFLogxK

U2 - 10.1016/0040-6031(91)80067-S

DO - 10.1016/0040-6031(91)80067-S

M3 - Article

AN - SCOPUS:0039256879

VL - 175

SP - 207

EP - 213

JO - Thermochimica Acta

JF - Thermochimica Acta

SN - 0040-6031

IS - 2

ER -