Nekuvandudzwa kwemazuva ano epamusoro-tech, electromagnetic interference (EMI) uye electromagnetic kuenderana (EMC) matambudziko anokonzerwa nemafungu emagetsi ari kuramba achiwedzera.Izvo hazvikonzere kukanganisa uye kukuvadza kune zviridzwa zvemagetsi nemidziyo, zvinokanganisa kushanda kwavo kwakajairika, uye kudzoreredza zvakanyanya kukwikwidza kwenyika yedu mune zvemagetsi zvigadzirwa nemidziyo, uye zvakare kusvibisa nharaunda nekuisa hutano hwevanhu mungozi;Pamusoro pezvo, kuvuza kwemafungu emagetsi kuchaisawo mungozi kuchengetedzwa kweruzivo rwenyika uye chengetedzo yezvakavanzika zvechiuto.Kunyanya, zvombo zvemagetsi zvemagetsi, izvo zviri zvombo zvitsva-zvimbo, zvakabudirira, izvo zvinogona kurwisa zvakananga michina yemagetsi, masisitimu emagetsi, nezvimwewo, zvichikonzera kutadza kwenguva pfupi kana kukuvadzwa zvachose kune masisitimu eruzivo, nezvimwe.

Naizvozvo, kuongorora zvinobudirira zvemagetsi ekudzivirira zvekudzivirira kukanganiswa kwemagetsi uye matambudziko emagetsi emagetsi anokonzerwa nemafungu emagetsi anovandudza kuchengetedzwa uye kuvimbika kwezvigadzirwa zvemagetsi nemidziyo, kuwedzera kukwikwidza kwepasirese, kudzivirira electromagnetic pulse zvombo, uye kuve nechokwadi chekuchengetedzwa kweruzivo rwekutaurirana masisitimu uye network system. , masisitimu ekutapurirana, mapuratifomu ezvombo, nezvimwewo zvine kukosha kukuru.

1. Musimboti we electromagnetic shielding (EMI)

Electromagnetic shielding ndiko kushandiswa kwezvinhu zvinodzivirira kuvhara kana kudzikamisa kupararira kwesimba remagetsi pakati penzvimbo yakadzivirirwa nenyika yekunze.Nheyo yekudzivirira kwemagetsi ndeye kushandisa iyo inodzivirira muviri kuratidza, kutora uye kutungamira kuyerera kwemagetsi emagetsi, ayo ane hukama zvakanyanya nemachaji, mafungu uye polarization inokonzerwa pamusoro peiyo inodzivirira chimiro uye mukati memuviri unodzivirira.Shielding yakakamurwa kuita magetsi ekudzivirira (electrostatic shielding uye alternating electric field shielding), magnetic field shielding (yakaderera-frequency magnetic field uye high-frequency magnetic field shielding) uye electromagnetic field shielding (electromagnetic wave shielding) maererano nemusimboti wayo.Kazhinji kutaura, electromagnetic shielding inoreva iyo yekupedzisira, kureva, kuchengetedza magetsi uye magineti minda panguva imwe chete.

2. Electromagnetic shielding material

Parizvino, composite electromagnetic shielding coatings inoshandiswa zvakanyanya.Mamiriro avo makuru mafirimu ekugadzira resin, conductive filler, diluent, coupling agent uye zvimwe zvinowedzera.Conductive filler chikamu chakakosha chayo.Iyo yakajairika isirivha (Ag) hupfu uye mhangura (Cu) hupfu., nickel (Ni) hupfu, sirivha-yakavharwa poda yemhangura, kabhoni nanotubes, graphene, nano ATO, nezvimwe.

2.1Carbon nanotubes(CNTs)

Carbon nanotubes ine yakakura chikamu ratio, yakanakisa magetsi, magineti zvivakwa, uye yakaratidza kuita kwakanakisa mu conductivity, kutora uye kudzivirira.Naizvozvo, kutsvagisa uye kusimudzira kwekabhoni nanotubes se conductive mafirita emagetsi ekudzivirira machira kwave kuwedzera kufarirwa.Izvi zvinoisa zvinodikanwa zvakanyanya pakuchena, kugadzirwa, uye mutengo wecarbon nanotubes.Iyo kabhoni nanotubes inogadzirwa naHongwu Nano, kusanganisira imwe-yakavakirwa uye yakawanda-yakavakirwa, ine kuchena kunosvika 99%.Kunyangwe iyo kabhoni nanotubes yakaparadzirwa mumatrix resin uye kana iine hukama hwakanaka nematrix resin inova chinhu chakananga chinokanganisa mashandiro ekudzivirira.Hongwu Nano inopawo yakaparadzirwa kabhoni nanotube dispersion solution.

2.2 Flake sirivheri hupfu ine yakaderera inooneka density

Yekutanga yakaburitswa conductive coating yaive patent yakapihwa neUnited States muna 1948 iyo yakagadzira sirivheri uye epoxy resin kuita conductive adhesive.Iyo electromagnetic yekudzivirira pendi yakagadzirwa nebhora yakagayiwa flake sirivheri poda inogadzirwa naHongwu Nano ine hunhu hwekudzikira, conductivity yakanaka, kukwirira kwekudzivirira, kushivirira kwakasimba kwezvakatipoteredza, uye kuvaka kuri nyore.Iwo anoshandiswa zvakanyanya mukukurukurirana, zvemagetsi, zvekurapa, zvemuchadenga, zvivakwa zvenyukireya uye mamwe minda.Shielding pendi inokodzerawo kupfekedzwa kwepamusoro kweABS, PC, ABS-PCPS uye mamwe mapurasitiki einjiniya.Zviratidziro zvekushanda zvinosanganisira kupfeka kuramba, kukwira uye kwakadzika tembiricha kuramba, humidity uye kupisa kuramba, kunamatira, magetsi resistivity, electromagnetic kuenderana, nezvimwe zvinogona kusvika pachiyero.

2.3 Hupfu hwemhangura nehupfu nickel

Copper poda conductive pendi ine mutengo wakaderera uye iri nyore kupenda, zvakare ine yakanaka electromagnetic shielding effect, uye nekudaro inoshandiswa zvakanyanya.Iyo inonyanya kukodzera iyo anti-electromagnetic wave kupindira kwezvinhu zvemagetsi nemapurasitiki einjiniya segoko, nekuti iyo copper poda conductive pendi inogona kupfapfaidzwa kana kubhurwa nyore nyore.Nzvimbo dzepurasitiki dzemaumbirwo akasiyana-siyana dzakagadzirwa nesimbi kuti dzigadzire electromagnetic shielding conductive layer, kuitira kuti purasitiki iwane chinangwa chekudzivirira mafungu emagetsi.Iyo morphology uye huwandu hwehupfu hwemhangura ine simba guru pane conductivity yekuputira.Mhangura hupfu ine spherical, dendritic, uye flake-kunge maumbirwo.Chimiro cheflake chine nzvimbo yakakurisa yekubatanidza pane spherical shape uye inoratidza zvirinani conductivity.Pamusoro pezvo, hupfu hwemhangura (silver-coated copper powder) yakafukidzwa nesimbi isingashande sirivha poda, iyo isiri nyore kuita oxidize, uye zviri mukati mesirivheri zvinowanzo 5-30%.Copper poda conductive coating inoshandiswa kugadzirisa electromagnetic shielding yeABS, PPO, PS uye mamwe mapurasitiki einjiniya nehuni Uye magetsi ekufambisa, ane huwandu hwakawanda hwekushandisa uye kukosha kwekusimudzira.

Pamusoro pezvo, iyo electromagnetic shielding yekubudirira kuyerwa mhedzisiro ye nano nickel poda uye electromagnetic shielding coatings yakasanganiswa nano uye micron nickel poda inoratidza kuti kuwedzera kwenano Ni particle kunogona kuderedza kushanda kwemagetsi ekudzivirira, asi kunogona kuwedzera kurasikirwa kwekunyura.Iyo magineti kurasikirwa tangent yakaderedzwa, pamwe nekukuvadzwa kwezvakatipoteredza, zvishandiso uye hutano hwevanhu hunokonzerwa nemafungu emagetsi.

2.4 Nano Tin Antimony Oxide (ATO)

Nano ATO poda, seyakasarudzika yekuzadza, ine zvese zviri pachena uye hunhu, uye huwandu hwakasiyana hwekushandisa muminda yekuratidzira yekupfekedza zvinhu, conductive antistatic coatings, uye yakajeka thermal insulation coatings.Pakati pezviratidziro zvekupfekedza zvekushandisa zveoptoelectronic, nano ATO zvinhu zvine anti-static, anti-glare uye anti-radiation mabasa, uye zvakatanga kushandiswa sekuratidzira magetsi ekudzivirira ekuvhara zvinhu.ATO nano coating materials ine yakanaka mwenje-ruvara pachena, yakanaka magetsi conductivity, mechanical simba uye kugadzikana, uye kushandisa kwavo kuratidza michina ndeimwe yeakakosha maindasitiri ekushandisa zveATO zvinhu parizvino.Electrochromic zvishandiso (zvakadai sezviratidziro kana smart windows) parizvino chinhu chakakosha che nano-ATO maapplication mumunda wekuratidzira.

2.5 Graphene

Serudzi rutsva rwekabhoni zvinhu, graphene ingangoita mhando nyowani yemagetsi ekudzivirira emagetsi kana microwave inonwisa zvinhu kupfuura kabhoni nanotubes.Zvikonzero zvikuru zvinosanganisira zvinotevera zvinhu:

①Graphene ifirimu rine hexagonal flat rinoumbwa nekabhoni atomu, maviri-dimensional zvinhu zvine ukobvu hwekabhoni atomu imwe chete;

②Graphene ndiyo yakaonda uye yakaomesesa nanomaterial munyika;

③Thermal conductivity yakakwirira kudarika kabhoni nanotubes nemadhaimani, inosvika pa5 300W/m•K;

④Graphene chinhu chine diki diki redziviriro munyika, chete 10-6Ω•cm;

⑤Kufamba kweelectronic kwegraphene patembiricha yepakamuri yakakwirira kudarika yecarbon nanotubes kana silicon crystals, inodarika 15 000 cm2/V•s.Kuenzaniswa nezvinhu zvechinyakare, graphene inogona kupaza nepakati pezvipimo zvepakutanga uye ive inoshanda nyowani wave inopinza kuti isangane nezvinodiwa zvekutora.Wave zvinhu zvine zvinodiwa zve "matete, akareruka, akafara uye akasimba".

Iko kunatsiridzwa kwemagetsi ekudzivirira uye kunwisa zvinhu kunoenderana nezviri mukati meiyo inonwisa mumiriri, kuita kweiyo inonwisa mumiririri uye yakanaka impedance inofananidzwa yeiyo inonwisa substrate.Graphene haingove neyakasiyana chimiro chemuviri uye yakanakisa mechanical uye electromagnetic zvivakwa, asiwo ine yakanaka microwave absorption zvivakwa.Mushure mokunge yasanganiswa nemagnetic nanoparticles, rudzi rutsva rwezvinhu zvinotora zvinogona kuwanikwa, izvo zvine zvose zvinorasikirwa nemagineti uye magetsi.Uye ine tarisiro yakanaka yekushandisa mumunda we electromagnetic shielding uye microwave absorption.

Kune zvakajairwa pamusoro pemagetsi ekudzivirira emagetsi nano hupfu, ese anowanikwa neHongwu Nano akagadzikana uye akanaka mhando.