Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-thermal-expansion and high-thermal-shock barium zirconate composite ceramic and preparation method thereof
The invention relates to barium zirconate composite ceramic with low thermal expansion and high thermal shock and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: grinding barium zirconate powder and ethanol, and drying to obtain barium zirconate powder; mixing and ball-milling the barium zirconate powder and a lanthanum compound, drying and granulating the ball-milled mixed solution, carrying out mechanical pressing, and carrying out isostatic pressing to obtain a ceramic green body; the isostatic pressing forming system is five-stage pressure boosting, the pressure intensity of the five-stage pressure boosting is 25-35 MPa, 40-70 MPa, 80-100 MPa, 110-130 MPa, 140-200 MPa and 140-200 MPa in sequence, and the pressure is maintained under the condition of 140-200 MPa; heating the ceramic green body to 980 to 1020 DEG C, 1290 to 1310 DEG C, 1490 to 1510 DEG C and 1550 to 1650 DEG C in sequence at different rates, and preserving heat for 1 to 6 hours under the condition of 1550 to 1650 DEG C, so as to obtain the low-expansion and high-thermal-shock barium zirconate composite ceramic. The sintering temperature is low, the carbon emission is low, and the prepared product is small in volume density, high in apparent porosity, low in thermal expansion coefficient and good in thermal shock resistance.
本发明涉及一种低热膨胀高热震锆酸钡复合陶瓷及其制备方法。其技术方案是：将锆酸钡粉料和乙醇研磨，干燥，得锆酸钡粉体；将所述锆酸钡粉体和镧化合物混合，球磨，将球磨后的混合液干燥造粒，机压成型，再等静压成型，得陶瓷生坯；等静压成型制度为五级升压：五级升压的压强依次为25～35MPa、40～70MPa、80～100MPa、110～130MPa、140～200MPa和140～200MPa，在140～200MPa条件下保压；将陶瓷生坯以不同的速率升温依次升温至980～1020℃、1290～1310℃、1490～1510℃和1550～1650℃，在1550～1650℃条件下保温1～6h，制得低膨胀高热震锆酸钡复合陶瓷。本发明烧结温度低和碳排放量低，所制制品体积密度小、显气孔率高﹑热膨胀系数低和热震性能好。
Low-thermal-expansion and high-thermal-shock barium zirconate composite ceramic and preparation method thereof
The invention relates to barium zirconate composite ceramic with low thermal expansion and high thermal shock and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: grinding barium zirconate powder and ethanol, and drying to obtain barium zirconate powder; mixing and ball-milling the barium zirconate powder and a lanthanum compound, drying and granulating the ball-milled mixed solution, carrying out mechanical pressing, and carrying out isostatic pressing to obtain a ceramic green body; the isostatic pressing forming system is five-stage pressure boosting, the pressure intensity of the five-stage pressure boosting is 25-35 MPa, 40-70 MPa, 80-100 MPa, 110-130 MPa, 140-200 MPa and 140-200 MPa in sequence, and the pressure is maintained under the condition of 140-200 MPa; heating the ceramic green body to 980 to 1020 DEG C, 1290 to 1310 DEG C, 1490 to 1510 DEG C and 1550 to 1650 DEG C in sequence at different rates, and preserving heat for 1 to 6 hours under the condition of 1550 to 1650 DEG C, so as to obtain the low-expansion and high-thermal-shock barium zirconate composite ceramic. The sintering temperature is low, the carbon emission is low, and the prepared product is small in volume density, high in apparent porosity, low in thermal expansion coefficient and good in thermal shock resistance.
本发明涉及一种低热膨胀高热震锆酸钡复合陶瓷及其制备方法。其技术方案是：将锆酸钡粉料和乙醇研磨，干燥，得锆酸钡粉体；将所述锆酸钡粉体和镧化合物混合，球磨，将球磨后的混合液干燥造粒，机压成型，再等静压成型，得陶瓷生坯；等静压成型制度为五级升压：五级升压的压强依次为25～35MPa、40～70MPa、80～100MPa、110～130MPa、140～200MPa和140～200MPa，在140～200MPa条件下保压；将陶瓷生坯以不同的速率升温依次升温至980～1020℃、1290～1310℃、1490～1510℃和1550～1650℃，在1550～1650℃条件下保温1～6h，制得低膨胀高热震锆酸钡复合陶瓷。本发明烧结温度低和碳排放量低，所制制品体积密度小、显气孔率高﹑热膨胀系数低和热震性能好。
Low-thermal-expansion and high-thermal-shock barium zirconate composite ceramic and preparation method thereof
一种低热膨胀高热震锆酸钡复合陶瓷及其制备方法
WANG ZHOUFU (Autor:in) / CHEN NA (Autor:in) / LIU HAO (Autor:in) / WANG XITANG (Autor:in) / MA YAN (Autor:in)
05.07.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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