Structural Properties and Crystallization Kinetics of  Na2o-Zno-P2o5 Glass Using Xrd and Dta Techniques

Ramdani, Halima; Bourezg, Yousf Islem; Kharroubi, Mohamed; Sahnoune, F.; Gacem, Lakhdar

doi:10.2139/ssrn.4150547

Cited by 1 publication

(1 citation statement)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, the investigation of isothermal growth behaviors can be realized by Johnson−Mehl−Avrami−Kolmogorov (JMAK) model [11][12][13][14][15] or Kissinger method [16] based on the differential scanning calorimetry (DSC) data and scanning electron microscope (SEM). The analysis and research of growth behaviors through the JMAK model are carried out from the theoretical level.…”

Section: Doi: 101002/crat202300304mentioning

confidence: 99%

The Isothermal and Non‐Isothermal Growth Behaviors of Ca₂Nb₂O₇ in Molten Slag

Han,

Ran,

Chen

et al. 2024

Cryst. Res. Technol.

View full text Add to dashboard Cite

Calcium pyroniobate (Ca2Nb2O7) as a kind of lead‐free piezoelectric material has been applied for different fields, but the study of isothermal and non‐isothermal growth behaviors of Ca2Nb2O7 in the molten slag is infrequent. In this paper, the in situ thermal analyzer with a single hot thermocouple technique (SHTT) is used to study the growth behaviors of Ca2Nb2O7 in molten slag. In the isothermal temperatures, the Ca2Nb2O7 presents two kinds of growth morphology, including three dimensional (3D) rhombus growth and fibrous one dimensional (1D) growth. The 3D rhombus is grown under the range of 1608 to 1628 K. When the temperature further decreases to 1593 K, the growth behavior of Ca2Nb2O7 becomes fibrous in 1D. Growth velocity affected by the degree of supercooling may account for the phenomenon of two kinds of growth behaviors in different temperatures. In the non‐isothermal growth process, the cooling rate over 10 K min−1 contributes to multiple crystal nucleuses growth of Ca2Nb2O7. The cooling rate below 5 K min−1 leads to single nuclear growth. This paper provides a control guideline for Ca2Nb2O7 growth.

show abstract