Chii chiri advanced ceramics?

(Chii chiri advanced ceramics?)

Ceramic zvinhu zvinoshandiswa muinjiniya zvikumbiro zvinogona kukamurwa kuita zvechinyakare ceramics uye yakakosha ceramics.

Iyo huru yezvigadzirwa zvemakeramiki echinyakare ivhu (Al2O3 · 2SiO2 · H2O), quartz (SiO2) uye feldspar (K2O · Al2O3 · 6SiO2).

Special ceramic inonziwo ceramic yemazuva ano, kana advanced ceramic. Zvinoenderana nekushandiswa kwakasiyana, inogona kukamurwa kuita zvimiro zveceramics uye inoshanda ceramics, senge piezoelectric ceramics, magineti ceramics, capacitor ceramics, yakakwirira tembiricha ceramics uye zvichingodaro.

Makeramiki epamusoro-tembiricha anosanganisira oxide ceramics, carbide ceramics, boride ceramics uye nitride ceramics.

Oxide ceramics:

Oxide ceramics zvinhu:

Nzvimbo yekunyunguduka inowanzopfuura 2000 ℃ uye tembiricha yekupfura inenge 1800 ℃. Pakupisa kwekushisa, maokisidi particles anoputirwa nekukurumidza, uye iyo yakasimba pamusoro pekuita inoitika pakati pezvimedu, zvichiita kuti pave nekuumbwa kwemakristasi makuru e ceramic (chikamu chimwe chete), kana kuti zvishoma zvegasi zvinogadzirwa.

Simba re oxide ceramics rinodzikira nekuwedzera kwekushisa, asi rinochengeta simba rakakwirira riri pasi pe1000 ℃, uye rinochinja zvishoma nekushisa.

Yakachena oxidized ceramics yakanaka yezvimiro zvinhu zvekupisa kupisa kwemoto kuramba, uye ceramics haizoburitse oxidation chero mamiriro ezvinhu.

Oxide ceramics inosanganisira:

Alumina ceramics Al2O3

Chimiro chealumina ndechekuti O yakanyatso kurongeka mune hexagonal chimiro uye Al inotora nzvimbo yepakati. Pane zvishoma zvakachena alumina mumasikirwo. Zvichienderana nehuwandu hwekusvibiswa, alumina inogona kuva tsvuku kana bhuruu. Mukugadzirwa chaiko, iyo Al2O3 yemukati yealuminium ceramics inogona kukamurwa kuita 75,95,99 uye mamwe marudzi eporcelain.

Nzvimbo yakanyunguduka yealumina yakakwira se2050 ℃, uye ine yakanaka oxidation kuramba uye kuomarara kwakanyanya, uye kuoma kweiyo microcrystalline corundum tsvuku inogona kusvika 1200 ℃. Inowanzo shandiswa mukugadzira simbi waya yekudhirowa inofa uye yekucheka yakadzimwa simbi maturusi.

Zirconia ceramics

Nzvimbo yakanyunguduka ye zirconia ceramics iri pamusoro pe2700 ℃ uye inokwanisa kumira tembiricha yepamusoro ye2300 ℃. Iyo tembiricha inokurudzirwa ndeye 2000 ℃ ~ 2200 ℃. Naizvozvo, inogona kushandiswa se reactor insulation zvinhu. Zirconia sechinhu chinowedzera chinogona kuvandudza zvakanyanya kusimba uye kusimba kweceramics uye kugadzira zirconia toughened ceramics (PSZ).

Zirconia toughened ceramics ine multiphase chimiro uye inogona kuva nematatu akasiyana makristasi zvimiro patembiricha dzakasiyana uye kumanikidzwa, kuitira kuti kushushikana kukonzerese shanduko yechikamu uye nhanho shanduko kuomarara pasi pemamiriro akakodzera, uye inovandudza zvakanyanya kuomarara kwekutsemuka. Zirconia yakaomeswa alumina ceramic zvinhu ine simba re1200 MPa uye kuomarara kwekutsemuka kwe15MPa m.

Zirconia toughened ceramics ine zvivakwa zvekusangana nezvinodiwa zvekupisa extrusion kufa, uye ine hunhu hwekupisa tembiricha kuramba, corrosion resistance uye kupfeka kuramba, kunyanya pasi petembiricha yepamusoro uye kumanikidzwa uye kudiki diki deformation. inonyanya kukodzera kune inopisa extrusion die pane tungsten carbide, nickel-based kana cobalt-based cemented carbide.

Kuomarara kwe zirconia toughened ceramics kwakakwira kupfuura iyo yesimbi, kuoma kwayo kwakakwira kupfuura kweyakajairika ceramics, uye ine yakakwira makemikari kugadzikana uye kuramba tembiricha inodarika 800 ℃. Kupisa kwesimbi upfu extrusion kufa kunogona kusvika 600 ℃, uye mhangura tsvimbo extrusion kufa inoshanda pa950 ℃. Hupenyu hwesevhisi yefa yakagadzirwa ne zirconia yakaomeswa ceramic ine makumi enguva yakareba kupfuura iyo ye simende carbide inofa. Simba rekukotama rePSZ rine magnesia rinogona kusvika 400 MPa.

Izvo zvisingabatsiri zve zirconia toughened ceramics hazvisi-ductility, yakaderera thermal conductivity uye kusawirirana pakati pekuwedzera kwekupisa uye zvinhu zvesimbi, izvo zvinofanirwa kutariswa mukugadzira uye kushandiswa. Zirconia uye kuita kwayo kwakanaka mukugadzirwa kwewaya yekudhirowa kufa, kudhirowa kufa, nezvimwewo, inowanzoshandiswa mukuita kwakadzika kudhirowa simbi isina tsvina.

Carbide ceramics:

Carbide ceramics inosanganisira silicon carbide, boron carbide, cerium carbide, molybdenum carbide, niobium carbide, zirconium carbide, titanium carbide, vanadium carbide, tungsten carbide, tantalum carbide zvichingodaro. Iyi mhando ye carbide ine yakakwira kunyungudika, kuoma uye kupfeka kuramba, asi hurombo hwepamusoro tembiricha oxidation kuramba (inenge 900C ~ 1000 ℃) uye yakakwirira brittleness.

Inonyanya kushandiswa seyakakwira tembiricha zvinhu kana yakakwirira simba zvinhu muindasitiri yemakemikari, indasitiri yemotokari, indasitiri yenyukireya, microelectronics indasitiri, laser uye mamwe minda. Mukugadzira mold, inowanzo shandiswa mukupfeka-inodzivirira, corrosion-resistant waya kudhirowa kufa, kuumba kufa, kupisa kufa-kukanda kufa, huchi hwe ceramic mold zvichingodaro.

Carbide Ceramics Properties:

Carbide ceramics ine yakakwira kunyungudika. Semuenzaniso, panonyungudika titanium carbide i3460 ℃, iyo yetungsten carbide i2720 ℃, uye iyo ye zirconium carbide i3540 ℃.

Kuoma kwe carbide ceramics kwakakwira. Semuenzaniso, boron carbide ndiyo yakaomesesa zvinhu mushure medhaimondi uye cubic boron nitride.

Good thermal conductivity uye kugadzikana kwemakemikari. Carbide Ceramics haiite neasidhi, yega simbi carbide ceramics haibatike neasidhi kunyangwe ichipisa, uye iyo yakatsiga carbide ceramics haina kana corroded nemusanganiswa wenitric acid uye hydrofluoric acid.

Carbide ceramics inosanganisira:

Silicon carbide ceramics

Kuwanda kwesilicon carbide ceramics ndeye 3.2 × 10 kg/m3, simba rekukotama i200 ℃ 250 MPa, simba rekumanikidza iri (1000 ℃) 1500 MPa, kuoma kuri 9.2, kupisa kwemhepo kwakakwira zvakanyanya, kuwedzera kwekupisa kunoenderana. idiki kwazvo, uye inoiswa oxidized zvishoma nezvishoma pa900C ~ 1300 ℃.

Boron carbide ceramics

Boron carbide ceramics ine yakanyanya kuoma uye yakasimba abrasive kupfeka kuramba, uye nzvimbo yavo yekunyungudika inosvika 2450 ℃. Ichaita oxidize nekukurumidza pakupisa kwepamusoro uye kuita nesimbi inopisa kana yakanyungudutswa yeferrous. Inonyanya kushandiswa semabrasives, dzimwe nguva anoshandiswa mukugadzira super-yakaoma chishandiso zvinhu.

Boride ceramics

Zvivakwa zve boride ceramics

Excellent high tembiricha maitiro. Nzvimbo yekunyunguduka ndeye 1800 ℃ ~ 2500 ℃. Iyo ine yakanyanya kupisa tembiricha oxidation kuramba uye tembiricha yebasa inosvika 1400 ℃. Pakupisa kwepamusoro kwe800 ℃, simba rekukotama rinenge risingadzike, uye kudzikira kwekuomarara nekuwedzera kwekushisa kudiki pane kwezvimwe zvinhu.

Nekuoma kwepamusoro. Pakamuri tembiricha, kutsemuka kuoma KIC inosvika 30 MN/m basa, inova 6-8 nguva kuti mumiririri engineering zvedongo nesilicon carbide. Kana chiyero chezviyo cheB4C chichinatswa kusvika 5 μ m, simba racho 500 kusvika 600 MPa, uye kana chiyero chezviyo chiri pasi pe1 μ m, simba rinopfuura 1000 MPa.

High kuoma uye zvakanaka kupfeka kuramba. Hukukutu hunosvika 1000 HV uye hune high shear modulus. Chemical erosion resistance, yakaoma kunyungudika, asi yakashata yakanyanya tembiricha yecorrosion resistance uye oxidation resistance.

Inoshandiswa zvakanyanya muindasitiri yenyukireya, aerospace uye mamwe minda. Inonyanya kushandiswa kune yakakwira tembiricha mabearings, mukati memoto weinjini nozzles, dzakasiyana-siyana tembiricha michina, midziyo inobata neyakanyungudutswa isina-ferrous simbi, magetsi ekubata zvinhu, kupfeka-resistant zvinhu uye maturusi emidziyo, nezvimwewo Mukugadzira mold, inowanzoshandiswa. kugadzira mold structural components, heat-resistant components uye zvichingodaro.

Boride ceramics inosanganisira:

Zirconium boride ceramics yakagadzirwa ne zirconium diboride (ZrB2), titanium diboride (TiB2), lanthanum hexboride (LaB6), titanium boride, chromium boride, molybdenum boride uye tungsten boride, nezvimwe.

Nitride ceramics.

Zvinhu zve nitride ceramics:

Iyo trisilicon tetra-nitride ceramic ine yakanakisa anti-oxidation kugona, inotanga inoshanda oxidation pa1400 ℃, uye ine yakanaka makemikari kuramba. Mamwe anewo akakosha emuchina, dielectric kana thermal conductivity.

Sintering yakaoma. Chekutanga, yemhando yepamusoro poda zvigadzirwa zvinogadzirwa, uye ipapo zvigadzirwa zveceramic zvinogadzirwa ne nitriding reaction sintering, inopisa kudzvanya sintering, inopisa isostatic kudzvanya sintering zvichingodaro.

Nitride ceramics inosanganisira:

Silicon tetra-nitride (Si3N4), boron nitride (BN), aluminium nitride (AlN), nezvimwewo.

Yepamusoro Ceramics Supplier

RBOSCHCO mutengesi akavimbika wepasi rose wemakemikari zvinhu uye mugadziri ane anopfuura makore gumi nemaviri-ruzivo mukupa emhando yepamusoro makemikari nemananomaterials. Iyo kambani inotumira kune nyika dzakawanda dzinosanganisira USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Uganda, Turkey, Mexico, Azerbaijan, Belgium, Cyprus, Czech Republic, Brazil, Chile, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, Germany, France, Italy, Portugal, nezvimwe.

Semugadziri anotungamira nanotechnology yekuvandudza, RBOSCHCO inotonga pamusika. Chikwata chedu chehunyanzvi chebasa chinopa mhinduro dzakakwana kubatsira kuvandudza kushanda kwemaindasitiri akasiyana, kugadzira kukosha, uye kubata nyore nematambudziko akasiyana.

Kana muchitsvaga upfu hweAl2O3 kana humwe upfu hweceramics hwemhando yepamusoro, ndapota tumirai email. ( [email protected] )

(Chii chiri advanced ceramics?)