English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The Si2N2O ceramics with low dielectric constant, low thermal diffusivity and  high thermal shock resistance were successfully prepared by vacuum  sintering. The amorphous Si3N4 was used as raw material with Li2CO3 as  sintering additive. The phase, microstructure, oxidized resistance,  mechanical and dielectric properties of the Si2N2O ceramics were  investigated. XRD analysis showed that the suitable content of Li2CO3 could  promote the generation of Si2N2O ceramics. However, the excess or  insufficient amount of Li2CO3 additive would cause decomposition of Si2N2O  phase. The Li2O volatilized at high temperature leaving highly pure (99.63%)  porous Si2N2O ceramics. The flexural strength of the porous Si2N2O ceramics  (with ≈49.19%of open porosity) was about 30MPa, the residual strength ratio  was more than 70% after 1300°C quenching in air. The SiO2 layer formed by  oxidization could prevent Si2N2O ceramics from further oxidizing. Therefore,  these Si2N2O ceramics will be excellent thermal insulation and  wave-transparent materials for high temperature microwave sintering furnace.

Fabrication and properties of Si2N2O ceramics for microwave sintering furnace