摘要:
The crystallization system includes a crucible provided with a bottom and with side walls designed to contain the material to be solidified and a device for creating a main thermal gradient inside the crucible in a perpendicular direction to the bottom of the crucible. An additional inductive heating device is arranged at the level of the side walls of the crucible facing the liquid material and without overlapping with the solid phase. This additional inductive heating device is configured to heat a part of the crystalline material located in the vicinity of the triple contact line between the liquid material, the solidified material and the crucible so that the interface between the liquid material and the solidified material forms a convex meniscus in the vicinity of the triple contact line.
摘要:
The melting and solidification furnace for crystalline material includes a crucible having a bottom and side walls, and means for heating the crystalline material by magnetic induction. The furnace includes at least one lateral thermal insulation system arranged at the periphery of the crucible around the side walls. At least one lateral element of the lateral thermal insulation system moves with respect to the side walls between an insulating position and a position fostering thermal leakage. The lateral thermal insulation system has an electric conductivity of less than 1 S/m and a thermal conductivity of less than 15 W/m/K.
摘要翻译:用于结晶材料的熔化和固化炉包括具有底部和侧壁的坩埚和通过磁感应加热结晶材料的装置。 该炉包括至少一个侧壁保温系统,该系统布置在坩埚周围的侧壁周围。 横向保温系统的至少一个横向元件相对于绝缘位置和促进热泄漏的位置之间的侧壁移动。 横向保温系统的导电率小于1S / m,导热率小于15W / m / K。
摘要:
The invention relates to a process for applying a liquid UV-curable primer sealant to natural stone tiles and related articles followed immediately by the exposure to a requisite amount of low intensity UVA-type UV radiation to partially cure the primer sealant. The partial curing, or pre-setting, of the primer sealant enables control of the ultimate depth of penetration of the primer sealer into the natural stone tiles and natural stone articles of which many examples are quite porous. Because the low level UV irradiation is instantaneous after the primer sealant application the level of primer sealant penetration into the natural stone surface is regulated. The pre-curing of the primer sealant is conducted to intentionally solidify or immobilize the sealant that has actually penetrated into the natural stone surface. The uppermost layers of the primer sealant are left in a semi-liquid or uncured state to allow for wetting and intermingling by the top sealant once it is applied. Thus, the prior art problem of uncontrolled wicking is solved by the present invention.
摘要:
The crystallization system includes a crucible provided with a bottom and with side walls designed to contain the material to be solidified and a device for creating a main thermal gradient inside the crucible in a perpendicular direction to the bottom of the crucible. An additional inductive heating device is arranged at the level of the side walls of the crucible facing the liquid material and without overlapping with the solid phase. This additional inductive heating device is configured to heat a part of the crystalline material located in the vicinity of the triple contact line between the liquid material, the solidified material and the crucible so that the interface between the liquid material and the solidified material forms a convex meniscus in the vicinity of the triple contact line.
摘要:
Provided is a novel method for sealing natural stone. The method comprises applying a base coat comprising a synthetic polymer, drying the base coat, applying a UV-cure topcoat, volatizing organic solvents from the topcoat, and curing the UV-cure topcoat by exposure to UV light. The UV-cure topcoat used in the method comprises an acrylate oligomer, photoinitiators, and flow and wetting additives. Methods are also provided wherein the topcoat further comprises a fungal inhibitor. The described methods provide a coating with excellent adhesion, and a smoother, more uniform topcoat. Moreover, this coating system allows moisture to migrate from the back side of tile through the coatings to evaporate to the surface, a feature critical to preventing deterioration of the stone over time.
摘要:
The melting and solidification furnace for crystalline material includes a crucible having a bottom and side walls, and means for heating the crystalline material by magnetic induction. The furnace includes at least one lateral thermal insulation system arranged at the periphery of the crucible around the side walls. At least one lateral element of the lateral thermal insulation system moves with respect to the side walls between an insulating position and a position fostering thermal leakage. The lateral thermal insulation system has an electric conductivity of less than 1 S/m and a thermal conductivity of less than 15 W/m/K.
摘要翻译:用于结晶材料的熔化和固化炉包括具有底部和侧壁的坩埚和通过磁感应加热结晶材料的装置。 该炉包括至少一个侧壁保温系统,该系统布置在坩埚周围的侧壁周围。 横向热绝缘系统的至少一个横向元件相对于绝缘位置和促进热泄漏的位置之间的侧壁移动。 横向保温系统的导电率小于1S / m,导热率小于15W / m / K。
摘要:
The invention relates to a process for applying a liquid UV-curable primer sealant to natural stone tiles and related articles followed immediately by the exposure to a requisite amount of low intensity UVA-type UV radiation to partially cure the primer sealant. The partial curing, or pre-setting, of the primer sealant enables control of the ultimate depth of penetration of the primer sealer into the natural stone tiles and natural stone articles of which many examples are quite porous. Because the low level UV irradiation is instantaneous after the primer sealant application the level of primer sealant penetration into the natural stone surface is regulated. The pre-curing of the primer sealant is conducted to intentionally solidify or immobilize the sealant that has actually penetrated into the natural stone surface. The uppermost layers of the primer sealant are left in a semi-liquid or uncured state to allow for wetting and intermingling by the top sealant once it is applied. Thus, the prior art problem of uncontrolled wicking is solved by the present invention.
摘要:
The present invention relates to a method of sealing natural stone tiles and stone articles by applying and curing by UV radiation a liquid, solventless sealant onto natural stone tiles and articles to provide permanent protection, abrasion resistance, chemical and stain resistance and resistance to mold and other biological growth stains. The UV-curable solventless sealing composition comprises an effective amount of carboxyl functional, UV-curable reagent to provide for adhesion of the cured coating to the stone article. Additionally, the method describes the application of an optional liquid primer sealant comprising a UV-curable aqueous dispersion of an acrylate-functional resin.
摘要:
A decorative glass ornament may be formed from glass material and then caused to crack to produce an effect similar to that exhibited by naturally-occurring quartz: the glass is cracked or veined in random patterns. Glass material is heated and molded into a desired shape, and then, prior to substantial cooling, is dipped in a liquid medium having a lower temperature, causing cracks to form. Alternatively, a pre-shaped glass crystal may be caused to crack to produce a decorative ornament displaying similar effects. Epoxy paint may be applied to the ornaments after they have cracked, to produce additional visual effects.