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首页> 外文会议>Biennial Worldwide Congress on Refractories; 20070918-21; Dresden(DE) >THE INFLUENCE OF SINTERED OR FUSED MgO-STABILIZED ZrO_2 ON PROPERTIES OF ZIRCONIA PRODUCTS
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THE INFLUENCE OF SINTERED OR FUSED MgO-STABILIZED ZrO_2 ON PROPERTIES OF ZIRCONIA PRODUCTS

机译：烧结或熔融态的MgO稳定化ZrO_2对氧化锆产品性能的影响

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摘要

Influence of grain mass contents on properties of vi-brocast samples of sintered and fused MgO-stabilized ZrO_2 was studied. It was determined that open porosity of fired samples of all grain compositions from sintered MgO-stabilized ZrO_2 is higher than that of fused due to different open porosity of initial materials. At the same time, cold crushing strength of samples from sintered materials is higher and thermal shock resistance is lower than of samples from fused material with the same grain composition. Comparative studies on influence of the diluting additive (hydrophobic silica-organic liquid HSL-11) amount on flowability under vibration of a grain thixotropic mass of an optimal grain composition from sintered and fused MgO-stabilized ZrO_2 have been carried out. It was determined that the nature of flowability of the studied masses after introduction of the additive is identical, although its optimum amount providing maximum flowability of masses under vibration is different and makes 0.25 and 0.15 % for masses from sintered and from fused MgO-stabilized ZrO_2 correspondingly. It allows decreasing their moisture to 6.5 % and 5 % correspondingly at maximum flowability.A technology of vibrocast products from MgO-stabilized ZrO_2 both from sintered and fused has been developed. For service conditions connected with high mechanical load it is recommended to use products from sintered MgO-stabilized ZrO_2 characterised by high cold crushing strength - 200-250 N/mm~2, and for service conditions connected with sharp thermal changes it is recommended to use thermal shock resistant products from fused MgO-stabilized ZrO_2 characterised by high thermal shock resistant - more than 20 heat cycles without appearing of cracks.
机译：研究了晶粒质量含量对经烧结和熔融的MgO稳定化ZrO_2的Vi铸件样品性能的影响。已确定，由于初始材料的不同开孔率，来自烧结的MgO稳定的ZrO_2的所有晶粒成分的焙烧样品的开孔孔隙率均高于熔融的。同时，与具有相同晶粒组成的熔融材料的样品相比，来自烧结材料的样品的冷碎强度更高，而耐热冲击性则更低。进行了稀释添加剂（疏水性二氧化硅有机液体HSL-11）的量对烧结和熔融MgO稳定的ZrO_2的最佳晶粒组成的触变质量的振动下流动性的影响的比较研究。可以确定，加入添加剂后所研究物料的流动性性质相同，尽管在振动条件下可提供最大物料流动性的最佳量不同，并且使烧结和熔融MgO稳定的ZrO_2物料产生的质量分别为0.25％和0.15％。相应地。它可以在最大流动性的情况下将其水分分别降低至6.5％和5％。已开发了一种由MgO稳定的ZrO_2烧结和熔融而成的振动浇铸产品。对于具有高机械负载的使用条件，建议使用具有高抗碎强度-200-250 N / mm〜2的烧结MgO稳定的ZrO_2产品，对于具有剧烈热变化的使用条件，建议使用由熔融的MgO稳定的ZrO_2制成的抗热震产品，具有高抗热震性能-超过20个热循环，没有出现裂纹。

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