Nekuda kwehunhu hwayo hwakanaka hwemuviri, silicon carbide inoshandiswa zvakanyanya sezvinhu zvikuru zvemakemikari. Mashandisirwo ayo ane zvinhu zvitatu: kugadzira zvinhu zvinopisa zvinodzivirira kupisa - silicon molybdenum rod, silicon carbon tube, nezvimwewo; Kugadzira zvigadzirwa zvinodzivirira kupisa. Sechinhu chakakosha chinodzivisa kupisa, chinoshandiswa mukunyungudutsa simbi nesimbi sechitofu chesimbi chinoputika, cupola nezvimwe zvinogadzirisa stamping, ngura, kukuvara kwenzvimbo yakasimba yezvigadzirwa zvisingatsvi; Muzvimedu zvinonyungudutsa zvesimbi zvisingawanzoitiki (zinc, aluminium, copper) zvekunyungudutsa furnace charge, pombi yesimbi inonyunguduka, mudziyo wekusefa, clamp pot, nezvimwewo; Uye tekinoroji yemuchadenga senozzle yemuswe weinjini inotsika, blade remhepo rinogara richipisa; Muindasitiri ye silicate, kune akawanda maindasitiri ekiln shed, box type resistance furnace charge, saggar; Muindasitiri yemakemikari, inoshandiswa sekugadzira gasi, carburetor yemafuta asina kuchena, flue gas desulfurization furnace nezvimwewo.
Kushandiswa kwakachena kwezvigadzirwa zvekugadzira α-SiC, nekuda kwesimba rayo rakakura, zvakaoma kuikuya kuita upfu hwakatsetseka hwakatsetseka, uye zvidimbu zvacho mapuratifomu kana fiber, zvinoshandiswa kukuya muchikamu chakamanikana, kunyangwe pakupisa kusvika pakupisa kwayo kwakatenderedza, hazvizobudise kupeta kwakajeka, hazvigone kupiswa, huwandu hwezvinhu hwakaderera, uye kuramba kwe oxidation kwakaderera. Saka, mukugadzirwa kwezvigadzirwa mumaindasitiri, huwandu hushoma hwe particles spherical β-SiC ultrafine powder hunowedzerwa ku α-SiC uye kusarudzwa kwezvinowedzera kuti zviwane zvigadzirwa zvine density yakakura. Sekuwedzera kwekubatanidza chigadzirwa, zvichienderana nerudzi rwacho kunogona kukamurwa kuita metal oxides, nitrogen compounds, high purity graphite, senge ivhu, aluminium oxide, zircon, zirconium corundum, lime powder, laminated glass, silicon nitride, silicon oxynitride, high purity graphite nezvimwewo. Mhinduro yemvura yeglue inoumba inogona kuva imwe kana kupfuura yehydroxymethylcellulose, acrylic emulsion, lignocellulose, tapioca starch, aluminium oxide colloidal solution, silicon dioxide colloidal solution, nezvimwewo. Zvichienderana nerudzi rwezvinowedzera uye musiyano wehuwandu hwekuwedzera, tembiricha yekupisa yecompact haina kufanana, uye huwandu hwetembiricha ndeye 1400~2300℃. Semuenzaniso, α-SiC70% ine saizi yezvikamu inodarika 44μm, β-SiC20% ine saizi yezvikamu isingasviki 10μm, ivhu 10%, pamwe ne4.5% lignocellulosic solution 8%, yakasanganiswa zvakaenzana, yakagadzirwa ne50MPa working pressure, inopfurwa mumhepo pa1400℃ kwemaawa mana, Kuwanda kwechigadzirwa kuri 2.53g/cm3, porosity iri 12.3%, uye simba rekudhonza riri 30-33mpa. Hunhu hwekusviba kwemhando dzakasiyana dzezvigadzirwa zvine zvimwe zvinowedzerwa zvakasiyana zvakanyorwa muTafura 2.
Kazhinji, reaction-sintered silicon carbide refractories ine hunhu hwepamusoro-soro muzvinhu zvese, senge simba rakasimba rekumanikidza, simba rakasimba rekudzivirira kupisa, simba rakanaka rekupfeka, simba rakasimba rekupisa uye simba rekudzivirira ngura ye solvent pakupisa kwakakura. Zvisinei, zvinofanirawo kuonekwa kuti dambudziko rayo nderekuti antioxidant effect haina kunaka, izvo zvinokonzera kuwedzera kwehuwandu uye kushanduka munzvimbo inodziya zvakanyanya kuderedza hupenyu hwebasa. Kuti ive nechokwadi chekuti reaction-sintered silicon carbide refractories iri kuramba ichipisa, basa rakawanda rekusarudza raitwa pa bonding layer. Kushandiswa kwe ivhu (rine metal oxides) fusion, asi hakuna kupa buffer effect, silicon carbide particles ichiri pasi pe air oxidation uye ngura.
Nguva yekutumira: Chikumi-21-2023