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A platform for research: civil engineering, architecture and urbanism
Gypsum composition, method for preparing gypsum mold from gypsum composition and application of gypsum mold
The invention belongs to the technical field of target material manufacturing, and particularly relates to a gypsum composition, a method for preparing a gypsum mold from the gypsum composition and application of the gypsum mold. The gypsum composition is prepared from the following components in parts by mass: 95 to 105 parts of gypsum powder and 0.05 to 3.2 parts of an additive, the additive comprises tartaric acid and polyvinylpyrrolidone. The additive mainly acts on the crystallization process during solidification of a plaster mold, the crystal form of the solidified plaster mold is changed, a long-strip-shaped gypsum crystal is converted into a short-block-shaped gypsum crystal, compared with a long-thin-strip-shaped gypsum crystal, the short-block-shaped gypsum crystal is not prone to fragmentation, has a more complete and regular crystal form and has better strength, meanwhile, the pore structure is not changed, and the strength of the short-block-shaped gypsum crystal is improved. The original porosity is reserved, and the relatively high water absorption rate is kept, so that the plaster mold has high strength and high water absorption rate required by slip casting at the same time.
本发明属于靶材制造技术领域，具体涉及一种石膏组合物、石膏组合物制备石膏模具的方法和应用。该石膏组合物，以质量份数计，包括：石膏粉95～105份，添加剂0.05～3.2份；所述添加剂包括酒石酸和聚乙烯吡咯烷酮。本发明所用添加剂主要作用于石膏模具凝固时的结晶过程中，改变石膏模具凝固后的晶型，使石膏晶体由长条状转换为短块状，短块状相比于细长条状不易碎化，具有更完整、规则的晶型，使其具有更好的强度，同时未改变孔隙结构，保留了原有的孔隙率，保持了较高的吸水率，从而使石膏模具同时具备注浆成型所需要的高强度与高吸水率。
Gypsum composition, method for preparing gypsum mold from gypsum composition and application of gypsum mold
The invention belongs to the technical field of target material manufacturing, and particularly relates to a gypsum composition, a method for preparing a gypsum mold from the gypsum composition and application of the gypsum mold. The gypsum composition is prepared from the following components in parts by mass: 95 to 105 parts of gypsum powder and 0.05 to 3.2 parts of an additive, the additive comprises tartaric acid and polyvinylpyrrolidone. The additive mainly acts on the crystallization process during solidification of a plaster mold, the crystal form of the solidified plaster mold is changed, a long-strip-shaped gypsum crystal is converted into a short-block-shaped gypsum crystal, compared with a long-thin-strip-shaped gypsum crystal, the short-block-shaped gypsum crystal is not prone to fragmentation, has a more complete and regular crystal form and has better strength, meanwhile, the pore structure is not changed, and the strength of the short-block-shaped gypsum crystal is improved. The original porosity is reserved, and the relatively high water absorption rate is kept, so that the plaster mold has high strength and high water absorption rate required by slip casting at the same time.
本发明属于靶材制造技术领域，具体涉及一种石膏组合物、石膏组合物制备石膏模具的方法和应用。该石膏组合物，以质量份数计，包括：石膏粉95～105份，添加剂0.05～3.2份；所述添加剂包括酒石酸和聚乙烯吡咯烷酮。本发明所用添加剂主要作用于石膏模具凝固时的结晶过程中，改变石膏模具凝固后的晶型，使石膏晶体由长条状转换为短块状，短块状相比于细长条状不易碎化，具有更完整、规则的晶型，使其具有更好的强度，同时未改变孔隙结构，保留了原有的孔隙率，保持了较高的吸水率，从而使石膏模具同时具备注浆成型所需要的高强度与高吸水率。
Gypsum composition, method for preparing gypsum mold from gypsum composition and application of gypsum mold
一种石膏组合物、石膏组合物制备石膏模具的方法和应用
HAYASHI TOMONARI (author) / OU JINHUI (author) / HOU QINGLONG (author) / LI QIANG (author) / LUO YUNXIA (author) / ZHANG KE (author)
2024-11-12
Patent
Electronic Resource
Chinese
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