气雾化制粉用小尺寸氧化锆质喷嘴的制备和性能研究  

Study on preparation and performance of small-size ZrO_(2) nozzle for powder production by gas atomization

作　　者：王来稳[1] 于建宾[1] 马渭奎[1] 王刚[1] 杜鹏辉 王文武[1] WANG Laiwen;YU Jianbin;MA Weikui;WANG Gang;DU Penghui;WANG Wenwu(Sinosteel Luoyang institute of Refractories Research CO.,Ltd,State Key Laboratory of Advanced Refractories,Luoyang 471039,China)

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471039

出　　处：《粉末冶金工业》2022年第3期63-67,共5页Powder Metallurgy Industry

摘　　要：以电熔氧化钇稳定氧化锆和单斜氧化锆为主要原料,氧化钇为稳定剂,加入量分别为2%、4%和6%,采用热压铸工艺制备了小尺寸氧化锆喷嘴坯体,经脱脂后分别在1 650、1 700和1 750℃下保温5 h烧成,研究了烧成温度和氧化钇加入量对氧化锆小尺寸喷嘴性能的影响,并对比了所研制氧化锆质小尺寸喷嘴上线服役性能。结果表明,随着烧成温度和氧化钇含量的提高,试样的致密度和常温扛折强度也逐渐提高,结构更为致密,c-ZrO_(2)相含量增加,线膨胀率增大且氧化钇为6%的试样线膨胀率明显高于加入量为2%和4%的试样;稳定化利率过高和结构过于致密不利于氧化锆喷嘴的抗热震性能,氧化钇添加量为4%和1 700℃保温5h制备的氧化锆小尺寸喷嘴的综合性能最佳,上线服役性能最优。The small-size ZrO_(2) nozzle bodies were prepared by hot injection moulding with Y_(2)O_(3) stabilized ZrO_(2)and monoclinic ZrO_(2)as the main materials, the amount of Y_(2)O_(3) is 2%, 4 % and 6% respectively. After degreasing,the body was sintered at 1 650, 1 700 and 1 750 ℃ for 5 h, respectively. The effects of sintering temperature and Y_(2)O_(3) addition amount on the performance of small-size ZrO_(2) nozzle were studied, and the online service performance was compared. The results shows that with the increase of sintering temperature and Y_(2)O_(3) content, the density and room temperature folding strength of the samples are gradually increased, the structure is more compact, the content of c-ZrO_(2)phase increases, and the linear expansion rate increases. The linear expansion rate of the sample with Y_(2)O_(3) content of 6 % is significantly higher than that of the sample with Y_(2)O_(3) content of 2 % and 4 %. The high stabilization interest rate and dense structure are not conducive to the thermal shock resistance of ZrO_(2) nozzles. The ZrO_(2) small-size nozzle prepared by adding 4% Y_(2)O_(3) and sintering at 1 700 ℃ for 5 h has the best comprehensive performance and the best on-line service performance.

关 键 词：气雾化 氧化锆 喷嘴 烧成温度 氧化钇 

分 类 号：TQ174.1[化学工程—陶瓷工业]