| 학회 |
한국공업화학회 |
| 학술대회 |
2021년 가을 (11/03 ~ 11/05, 대구 엑스코(EXCO)) |
| 권호 |
25권 2호 |
| 발표분야 |
포스터-무기재료 |
| 제목 |
Effect of Silica Nanoparticle Size on the Bending Strength and Humidity Resistance of Sand Mold with Sodium Silicate Solution |
| 초록 |
The sand mold with the sodium silicate solution has low strength in humid condition because of the low humidity resistance of the sodium silicate. The addition of silica can improve the humidity resistance. In this study, the effect of silica nanoparticle size on the strength and humidity resistance of sand mold with inorganic binders was investigated. The inorganic binders were prepared by adding the silica nanoparticles with different size into sodium silicate solution. The sand molds for the bending strength test were prepared by mixing the artificial sand and the inorganic binder. The addition of silica nanoparticles improved the humidity resistance of sand molds compared to absence of silica due to increase of SiO2/Na2O ratio. As the increase of silica size, the bending strength of sand mold increased due to formation of discrete silica aggregates with high surface area. Thus, we suggest the size variation of silica nanoparticles affects the bending strength of sand molds. |
| 저자 |
김판성1, 배민아1, 백재호1, 제정호2, 이만식1
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| 소속 |
1한국생산기술(연), 2부산대 |
| 키워드 |
bending strength; humidity resistance; sand mold; silica nanoparticle; sodium silicate binder
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| E-Mail |
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