Influence of Monoclinic Zirconia Powder on the Properties ofZirconia Metering Nozzle Materials论文.pdfVIP

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Influence of Monoclinic Zirconia Powder on the Properties ofZirconia Metering Nozzle Materials论文.pdf

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Influence of Monoclinic Zirconia Powder on the Properties of Zirconia Metering Nozzle Materials ·1 · Influence of Monoclinic Zirconia Powder on the Properties of Zirconia Metering Nozzle Materials Ouyang Junhua, Zhao Yuxi, Cui Xiujun, Qiu Wendong, Liu Guangping (Shanghai Baosteel Industry Technological Service Co., Ltd., Baosteel Engineering Technology Group Co., Ltd., Shanghai 201900, China) Abstract By means of pressureless sintering process, the zirconia ceramic materials were prepared using calcia partially stabilized zirconia and monoclinic zirconia as raw materials, Y O and CeO powder as composite stabilizer, 2 3 2 PVA as binder. The effects of monoclinic zirconia grain size distribution, molding pressure and granulation on the sintering, mechanical strength, thermal shock resistance and phase composition of the specimens sintered at 1700℃ and 1720℃ for 3h in an air atmosphere were investigated. The results indicate that zirconia materials with good thermal shock resistance can be produced by this method. At the same time, monoclinic zirconia powder is finer, and the more contributions can be made to stability and densification of zirconia because of the transformation of monoclinic zirconia to cubic zirconia. Key words zirconia, monoclinic zirconia, thermal shock resistance, metering nozzle 1 Introduction Zirconia materials possess a high melting point (2680 ℃), good mechanical strength and excellent corrosion resistance et al. It becomes more and more important in refractories and ceramics. Especially in recent year