Kuongorora zvimiro zveporous silicon carbide ceramics

Izvo zvakakosha zve porous silicon carbide ceramicszvinonyanya kukonzerwa neiyo yakakosha porous chimiro, iyo ine porosity, pore saizi uye kugovera, uye chimiro chemakomba. Naizvozvo, zvinodikanwa kudzora porosity yayo, saizi yepore uye kugovera, uye chimiro chepore kuburikidza nenzira yekugadzirira kuti uwane inodiwa porous chimiro. Saka nzira yekugadzirira kwayo ndiyo yave yakatarisana nekutsvaga.

Zvivakwa zve porous SiC ceramics

1.Pore ​​properties

①Porosity

Porosity iperesenti yevhoriyamu inogarwa nemapores mune porous zvinhu kune yakazara vhoriyamu yezvinhu zvine porous (kusanganisira yakavhurika pores, hafu-yakavhurika pores uye yakavharwa pores emhando nhatu). Tsvagiridzo inoratidza kuti kuita kweporous zvinhu kunonyanya kuenderana ne porosity.

② Pore morphology

Pore ​​morphology inoreva morphology ye pores mune porous ceramics. Apo pores ari equiaxed pores, kushanda kwese kwechinyorwa is isotropic; asi kana ma pores ane mitsetse kana kuti flat, senge kuburikidza necarbonization yehuni yakagadzirwa nesilicon reaction sintering porous SiC ceramics, iyo pore chimiro kune imwe nzira.

③Pore ​​dhayamita uye kugovera

Pore ​​dhayamita isingasviki 2nm yezvinhu zvidiki, saizi yepore pakati pe2 ~ 50nm yemesoporous zvinhu, saizi yakakura kupfuura 20nm yezvinhu macroporous. Nehukuru hwepore uye kugovera kwehukuru hukuru hwekuita, kusanganisira permeability, permeability rate uye kusefa kuita.

2.Mechanical properties

Porous SiC ceramiczvinhu zvine brittle uye maitiro avo emuchina anowanzo kuratidzwa nekukotama kana kumanikidza simba. Porosity uye nzira yekugadzirira ine simba guru pamagetsi emagetsi eporous SiC ceramics.

3.Thermal Conductivity

Porosity uye pore morphology ine simba guru pakupisa kwekushisa kwe porous ceramics. Kune porous ceramics ine yunifomu pore kugovera, thermal conductivity inoderera zvishoma nezvishoma sezvo chiyero chepore chinowedzera. Nekudaro, nekuda kwepore morphology ye porous ceramic zvinhu zvakagadzirirwa neakasiyana maitiro, kune misiyano mikuru, saka nzira yekupisa kupisa inoenderana nekusiyana uye yakaoma.

Porous SiC ceramicsIva neakanakisa emuviri zvimiro zveSiC pachayo, senge yakakwira yakawanda density, yakakwira chaiyo nzvimbo, kuomarara kwepamusoro, kushorwa kwecorrosion, kupikisa kwekushisa kwepamusoro, kukwira kwekushisa kwekushisa, kuderera kwehumwe hwekuwedzera kwekupisa, uye kuramba kuvhunduka kwekushisa, pamusoro pe. kugutsikana kwe porous nature ye ceramics.