Kev siv lub ntiaj teb tsawg hauv kev ua haujlwm ceramics

Kev siv lub ntiaj teb tsawg hauv kev ua haujlwm ceramics
Nws feem ntau suav nrog cov hauv qab no: superconducting ceramics, piezoelectric ceramics, conductive ceramics, dielectric ceramics thiab rhiab ceramics.
With the development of material science, functional composite ceramics have attracted much attention in recent years, and rare earth doping has also made great progress in the development and research of functional composite ceramics. Chen Ang, et al. of Zhejiang University, used the conventional preparation method of functional ceramics to composite YBa2Cu3O7-x with ferroelectric ceramic BaTiO3 to obtain YBa2Cu3O7-x-BaTiO3 series composite functional ceramics with coexistence of ferroelectricity and superconductivity. Its conductivity characteristics conform to the three-dimensional conductive behavior, and it is superconducting when the content of YBa2Cu3O7-x is high. Zhou Dongxiang and others from Huazhong University of Science and Technology pointed out that LaCoO3 SrCoO3 system and LaCrO3 SrCrO3 system composite functional ceramics can be used as electrode materials and gas sensing materials for MHD motors; In the NTC thermosensitive composite NiMn2O4-LaCrO3 ceramics, the new compound LaMnO3 conductive phase determines the main properties of the ceramics. Zou Qin of Xi'an Jiaotong University and others, by doping (Sr, Ca) TiO3 with rare earth ions Y3+and La3+, have eliminated the original process of coating with alkali metal ions (Nb5+, Ta5+) and conducting thermal diffusion. Moreover, the ceramics produced have high density, good process performance and low resistivity（ ρ 10-2 Ω/cm), high nonlinearity (nonlinear coefficient α >10).
Intelligent ceramics yog ib hom kev ua haujlwm ceramics nrog cov yam ntxwv ntawm kev kuaj tus kheej, kev hloov kho tus kheej, kev rov qab los ntawm tus kheej thiab kev hloov pauv ntawm tus kheej. Raws li tau hais los saum toj no, cov hlau lead lanthanum zirconate titanate (PLZT) ceramic tau los ntawm kev ntxiv lub ntiaj teb tsis tshua muaj lanthanum rau hauv cov hlau lead zirconate titanate (PZT) ceramic tsis yog ib qho zoo heev electro-optical ceramic, tab sis kuj yog ib qho ntse ceramic vim nws lub cim xeeb muaj nuj nqi, uas qhia txog tus kheej tuning mechanism ntawm cov duab nws tus kheej rov qab. Lub tswv yim ntawm cov khoom siv hluav taws xob zoo nkauj tau tawm tswv yim tshiab ntawm kev tsim thiab tsim cov khoom siv ceramic, uas muaj txiaj ntsig zoo rau kev nthuav dav cov ntawv thov ntawm lub ntiaj teb tsis tshua muaj nyob rau niaj hnub ua haujlwm ceramics. Cov kev tshawb fawb tsis ntev los no kuj qhia tau hais tias lub ntiaj teb tsis tshua muaj lub luag haujlwm tseem ceeb hauv cov khoom siv ceramic tshiab xws li bioceramics thiab antibacterial ceramics. Raws li cov ntsiab lus tsis tshua muaj hauv ntiaj teb tuaj yeem sib koom ua ke nrog cov khoom hloov pauv xws li nyiaj, zinc thiab tooj liab, cov tsim tsis tshua muaj lub ntiaj teb sib xyaw phosphate antibacterial tuaj yeem tsim cov hydroxyl radicals ntau ntawm cov khoom siv ceramics, yog li txhim kho cov kab mob ntawm cov kab mob.
Peb yuav tsum muab kev ua si tag nrho rau qhov zoo ntawm cov khoom siv hauv ntiaj teb tsis tshua muaj nyob hauv Suav teb, ntxiv dag zog rau kev tshawb fawb txog kev cuam tshuam ntawm lub ntiaj teb tsis tshua muaj doping ntawm kev ua haujlwm ntawm ceramics thiab kev txhim kho ntawm cov khoom siv hluav taws xob tshiab, thiab txhim kho cov txiaj ntsig ntawm cov khoom siv tsis tshua muaj hauv ntiaj teb. cov khoom siv high-tech.
Lub ntiaj teb tsis tshua muaj ceramic pigment feem ntau yog hais txog kev sib xyaw ntawm tsib xim rau xim zircon raws li lub ntiaj teb tsis tshua muaj ceramic pigment. Nws tuaj yeem siv los ua cov khoom siv kho kom zoo nkauj ntawm lub tsev ceramics xws li cov vuas xim glazed, cov vuas phab ntsa sab nrauv thiab cov vuas hauv pem teb, tshwj xeeb tshaj yog rau kev kho kom zoo nkauj ntawm cov khoom siv huv si ceramics, thiab kuj yog xim puag ntawm overglaze, underglaze thiab underglaze xim ntawm cov plooj (porcelain). Cov xim sib xyaw zircon raws li lub ntiaj teb tsis tshua muaj ceramic pigment yog npaj los ntawm lub xeev cov tshuaj tiv thaiv ntawm 900 ~ 1150 degree nrog zirconia thiab silica raws li cov ntaub ntawv matrix, hloov cov ntsiab lus thiab cov ntsiab lus tsis tshua muaj hauv ntiaj teb raws li cov xim sib xyaw, thiab ib qho me me ntawm cov mineralizer. Cov txheej txheem tseem ceeb yog raws li hauv qab no: cov xim theem yog xim liab, daj, xiav, ntsuab thiab grey, qhov ruaj khov yog tsawg dua lossis sib npaug li 1280 degree, thiab qhov kub siab tshaj plaws tuaj yeem ncav cuag 1300 degree), qhov chaw siv tau yog nplaim taws oxidation, thiab particle txoj kab uas hla yog tsawg dua 15 μ Tsis tsawg tshaj li 92 feem pua ​​thiab ntau tshaj 30 feem pua ​​ntawm m μ M yog xoom.