Gypsum Powder

Description

Gypsum is a fundamental raw material for manufacturing molds for ceramic industry, as it has a number of features that make it the best material for these uses. The characteristic porosity of the plaster allows quick absorption of a portion of water present within the clay, thus favoring the thickening.

Applications in Ceramics:

• Body material: Added to clay bodies to improve plasticity, workability, and prevent cracking during drying and firing.
• Mold making: Used to create molds for casting ceramic pieces due to its smooth finish and setting properties.
• Glaze component: Added to glazes to modify their melting point, texture, and opacity.

Properties:

• Versatile: Can be used in various forms, including raw powder, calcined gypsum (dehydrated), and as a component in ceramic bodies and glazes.
• High plasticity: Binds well with water and other clays, enhancing moldability and workability.
• Slow setting: Provides ample time for shaping and adjusting ceramic pieces before hardening.
• Thermal expansion: Expands slightly when heated, making it useful for adjusting firing shrinkage in certain clays.
• Fluxing agent: Lowers the melting point of glazes, promoting smoother finishes and brighter colors.
• Matte finish: When used in glazes, can create a soft, velvety texture compared to glossy glazes.

Uses of Gypsum:

• Drywall panels: The most common use, gypsum forms the core of drywall panels for walls and ceilings due to its fire-resistant, sound-insulating, and lightweight properties.
• Plaster of Paris: Calcined gypsum, also known as Plaster of Paris, is used for casting molds, decorative elements, and repairs due to its fast setting and hardening qualities.
• Cement retarder: Added to Portland cement to slow down its setting time, allowing for better workability.

Remember, the world of ceramics is full of fascinating materials and endless possibilities. Gypsum powder, with its understated elegance and versatility, invites you to unlock new horizons in your creative endeavors.