Catalytic properties of ZrB<sub>2</sub>–SiC–W ultra–high temperature ceramics at moderate temperatures

Li, N; Hu, Ping; Xing, Pifeng; Ke, Bo

doi:10.1088/1757-899x/479/1/012067

Cited by 3 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Soft glass may also be suitable, but the recombination coefficient for H-atoms on Pyrex increases significantly with increasing surface temperature, representing a definite detraction [43]. Likewise, ceramics are regarded as inert [44], but large reactors are rarely made from ceramics because of the surface roughness (which causes an increase in the surface loss of atoms) and porosity. Also, ceramics are opaque, preventing plasma monitoring by optical techniques such as spectroscopy and actinometry.…”

Section: Optimization Of Plasma Reactorsmentioning

confidence: 99%

Generation of Neutral Chemically Reactive Species in Low-Pressure Plasma

Primc

2022

Front. Phys.

View full text Add to dashboard Cite

The surface finish of organic and inorganic materials treated by gaseous plasma usually depends on the fluxes and fluencies of chemically reactive species such as molecular radicals. In low-pressure plasmas, the dissociation of molecules to parent atoms depends on the production rate in the gas phase and on the loss rate on surfaces. The processing will be efficient if the loss rate is minimized. The methods for minimizing the loss rate and thus increasing the processing efficiency are presented and discussed. The dissociation fraction of simple molecules exceeds 10% providing the plasma-facing materials are smooth with a low coefficient for heterogeneous surface recombination. The density of atoms in a plasma reactor increases with increasing pressure reaching a maximum and decreases with further pressure increase, which is explained by two competing processes. The energy efficiency also exhibits a maximum, which may be as high as 30% if plasma is sustained by electrodeless high-frequency discharges. Optimization of energy efficiency is not only beneficial for the costs of material processing but also for the prevention of excessive heating of treated materials. The latter is particularly important for organic materials because the surface functional groups are not stable but decay with increasing surface temperature.

show abstract

Section: Optimization Of Plasma Reactorsmentioning

confidence: 99%

Generation of Neutral Chemically Reactive Species in Low-Pressure Plasma

Primc

2022

Front. Phys.

View full text Add to dashboard Cite

show abstract

Oxidation of Porous HfB2–SiC Ultra-High-Temperature Ceramic Materials Rich in Silicon Carbide (65 vol %) by a Supersonic Air Flow

Симоненко

Гордеев

et al. 2020

Russ. J. Inorg. Chem.

View full text Add to dashboard Cite

Effect of 2 vol % Graphene Additive on Heat Transfer of Ceramic Material in Underexpanded Jets of Dissociated Air

Simonenko

Симоненко²,

Колесников³

et al. 2022

Russ. J. Inorg. Chem.

View full text Add to dashboard Cite

Catalytic properties of ZrB₂–SiC–W ultra–high temperature ceramics at moderate temperatures

Cited by 3 publications

References 12 publications

Generation of Neutral Chemically Reactive Species in Low-Pressure Plasma

Generation of Neutral Chemically Reactive Species in Low-Pressure Plasma

Oxidation of Porous HfB2–SiC Ultra-High-Temperature Ceramic Materials Rich in Silicon Carbide (65 vol %) by a Supersonic Air Flow

Effect of 2 vol % Graphene Additive on Heat Transfer of Ceramic Material in Underexpanded Jets of Dissociated Air

Contact Info

Product

Resources

About

Catalytic properties of ZrB2–SiC–W ultra–high temperature ceramics at moderate temperatures

Cited by 3 publications

References 12 publications

Generation of Neutral Chemically Reactive Species in Low-Pressure Plasma

Generation of Neutral Chemically Reactive Species in Low-Pressure Plasma

Oxidation of Porous HfB2–SiC Ultra-High-Temperature Ceramic Materials Rich in Silicon Carbide (65 vol %) by a Supersonic Air Flow

Effect of 2 vol % Graphene Additive on Heat Transfer of Ceramic Material in Underexpanded Jets of Dissociated Air

Contact Info

Product

Resources

About

Catalytic properties of ZrB₂–SiC–W ultra–high temperature ceramics at moderate temperatures