Funktsional keramikada noyob tuproqni qo'llash

Funktsional keramikada noyob tuproqni qo'llash
U asosan quyidagi jihatlarni o'z ichiga oladi: supero'tkazuvchi keramika, piezoelektrik keramika, o'tkazuvchan keramika, dielektrik keramika va sezgir keramika.
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).
Intellektual keramika - bu o'z-o'zini tashxislash, o'z-o'zini sozlash, o'z-o'zini tiklash va o'z-o'zini konvertatsiya qilish xususiyatlariga ega bo'lgan funktsional keramika. Yuqorida aytib o'tilganidek, qo'rg'oshin tsirkonat titanati (PZT) keramikasiga noyob tuproq lantanini qo'shish orqali olingan qo'rg'oshin lantan zirkonat titanati (PLZT) keramikasi nafaqat ajoyib elektro-optik keramika, balki shakl xotirasi funktsiyasi tufayli aqlli keramika hisoblanadi. bu shaklni o'z-o'zini tiklashning o'zini o'zi sozlash mexanizmini aks ettiradi. Aqlli keramika materiallari kontseptsiyasi seramika materiallarini ishlab chiqish va loyihalashning yangi kontseptsiyasini qo'llab-quvvatlaydi, bu zamonaviy funktsional keramikada noyob tuproqni qo'llashni kengaytirish uchun juda foydali. So'nggi tadqiqotlar shuni ko'rsatadiki, noyob erlar ham biokeramika va antibakterial keramika kabi yangi keramika materiallarida noyob rol o'ynaydi. Noyob tuproq elementlari kumush, sink va mis kabi o'tish elementlari bilan sinergiya qila oladiganligi sababli, ishlab chiqilgan noyob tuproq kompozit fosfat antibakterial keramika yuzasida ko'p miqdordagi gidroksil radikallarini ishlab chiqarishi mumkin, bu esa keramikaning antibakterial xususiyatlarini oshiradi.
Biz Xitoyda noyob tuproq resurslarining afzalliklariga to'liq e'tibor qaratishimiz, noyob tuproq dopingining funktsional keramika ishlashiga va yangi funktsional keramika rivojlanishiga ta'siri bo'yicha tadqiqotlarni yanada kuchaytirishimiz va noyob tuproqni qo'llash qiymatini samarali oshirishimiz kerak. yuqori texnologiyali materiallar.
Noyob tuproqli keramika pigmenti asosan zirkon asosidagi noyob tuproqli keramik pigmentni rang berish uchun besh rangning kombinatsiyasini anglatadi. U rangli sirlangan plitkalar, tashqi devor plitkalari va pol plitkalari kabi qurilish keramikasi uchun bezak materiali sifatida, ayniqsa, sanitariya-gigiyenik keramikalarni bezash uchun, shuningdek, chinni sirlangan, sirlangan va sir osti ranglarining rangli asosi sifatida ishlatilishi mumkin. Kompozit rangli tsirkon asosidagi nodir tuproqli keramik pigment matritsa materiallari sifatida sirkoniya va silika, kompozit rang beruvchi moddalar sifatida o'tish elementlari va noyob tuproq elementlari va oz miqdorda mineralizator bilan 900 ~ 1150 daraja qattiq holatdagi reaktsiya orqali tayyorlanadi. Asosiy texnik ko'rsatkichlar quyidagilardir: rang fazalari qizil, sariq, ko'k, yashil va kulrang, barqarorlik 1280 darajadan kam yoki unga teng, maksimal harorat esa 1300 darajaga yetishi mumkin), amaldagi atmosfera oksidlanish olovi, va zarracha diametri 15 m dan kam 92 foizdan kam bo'lmagan va m m ning 30 foizidan ko'pi M nolga teng.