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目的:配制凝胶注模法成型氧化锆陶瓷浆料,研究颗粒级配的混合氧化锆颗粒粉末配制凝胶注模氧化锆浆料后素坯的收缩和预烧结后的尺寸变化。方法:采用不同的颗粒粒径,制作氧化锆浆料,分为纳米组H1(26 nm);亚微米组H2(300 nm);混合组H3(1μm+300 nm+26 nm)。测试浆料的固含量与收缩率。结果:H1,H2,H3组的固含量分别为60.11 wt%,81.58 wt%,82.36 wt%;素坯的收缩率分别为0.87%,0.26%,0.29%,致密化收缩率分别为26.1%,23.1%,22.4%。结论:采用颗粒级配的混合组H3(1μm+300 nm+26 nm)的氧化锆浆料具有最高的固含量及最低收缩率。并获得最适合玻璃渗透的预烧结程序。
OBJECTIVE: To prepare the zirconia ceramic slurry by gel injection molding, and to study the shrinkage and the dimensional change of the preform after the gelled injection molded zirconia slurry with mixed zirconia particles. Methods: Zirconia slurries were prepared with different particle sizes and divided into nano-group H1 (26 nm), sub-micron group H2 (300 nm), and mixed group H3 (1 μm +300 nm +26 nm). The slurry was tested for solids content and shrinkage. Results: The solid contents of H1, H2 and H3 were 60.11 wt%, 81.58 wt% and 82.36 wt%, respectively. The shrinkage rates of china were 0.87%, 0.26% and 0.29% respectively, and the densification shrinkage rates were 26.1% 23.1%, 22.4%. Conclusions: Zirconia slurries of the mixed grade H3 (1 μm + 300 nm + 26 nm) with the particle size gradation have the highest solids content and the lowest shrinkage. And get the best pre-sintering process for glass penetration.