Roughening and destructive effects of sintering on micron-sized ZnO features

Ju, Hong-Fei; Ning, Kaijie; Lu, Kathy

doi:10.1016/j.actamat.2017.09.034

Cited by 6 publications

(8 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the ZnO ridges, the width continuously decreases with the sintering time; 25% shrinkage is generated. The continuous decrease in the ridge size is caused by the ZnO evaporation along with the densification as discussed in our previous work …”

Section: Resultsmentioning

confidence: 63%

“…It should be pointed out that the ZnO ridges have a much lower linear shrinkage after 8 hours of sintering. This is because of the evaporation effect of ZnO during sintering, which leads to extensive mass loss from the feature surface as discussed in our previous work …”

Section: Resultsmentioning

confidence: 82%

“…For the bulk ZnO and ZrO 2 samples, the sintering mechanisms, including both densification and grain growth, can be investigated from a newly developed relationship between grain size and relative density . Previous studies have revealed that ZnO and ZrO 2 bulk densify based on grain‐boundary diffusion. There are four different grain growth mechanisms when the densification is grain‐boundary dominant, including grain boundary migration, surface diffusion, volume diffusion, evaporation‐condensation, and gas diffusion .…”

Section: Discussionmentioning

confidence: 99%

“…Our prior work reported the sintering of micrometer‐sized ZnO features. We studied the destruction effect and densification process of micrometer‐sized ZnO ridges and demonstrated that the ZnO ridges have a higher densification rate compared with the bulk; the grain growth shows a destructive effect on the fidelity of the ridges. Focusing on the evaporation effect, we studied the sintering behavior of micrometer‐sized ZnO rods (H.F. Ju, K. Ning & K. Lu, under review).…”

Section: Introductionmentioning

confidence: 99%

“…The activation energy for ZrO 2 is about twice that for ZnO (500 kJ mol −1 for ZrO 2 and ~220 kJ mol −1 for ZnO). Even though both ZnO and ZrO 2 sintering has been stated as grain‐boundary diffusion enhanced densification, a coherent analysis of densification and grain growth in combination (considering the coupling effect from both) has not been available. This is especially needed for micrometer‐sized features.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effects of ceramic types on evolution of micrometer‐sized features during sintering

Ning

2018

J Am Ceram Soc

Self Cite

View full text Add to dashboard Cite

In this work, ZnO and ZrO 2 ridges with 2 lm size are created based on a centrifugeaided micromolding approach and then sintered with different time. Characterization of feature morphology, fidelity, grain size, relative density, and linear shrinkage has been conducted. The densification mechanisms for both ZnO and ZrO 2 are controlled by grain-boundary diffusion, but their grain growth mechanisms are dominated by gas diffusion and surface diffusion respectively. The sintering behavior for the bulk can be described with a N g /N b factor at 36, while for the features, a smaller N g /N b factor (15 for ZnO and 8 for ZrO 2 ) is needed. Attributed to their sintering mechanism difference, the grains in the ZnO features have a faster growth rate than those in the bulk, while the grains in the ZrO 2 features have a similar growth rate to those in the bulk. ZnO has a much faster grain growth behavior, leading to ridge fidelity loss and severe ridge destruction, while ZrO 2 has a much slower grain growth rate, resulting in high ridge fidelity and strong resistance to ridge destruction. K E Y W O R D Sdestruction, micrometer-sized, ridge feature, sintering mechanism, ZnO, ZrO 2

show abstract

Section: Resultsmentioning

confidence: 63%

Section: Resultsmentioning

confidence: 82%