Lignosulfonate has various applications in the ceramics industry due to its beneficial properties. Here are some common uses of lignosulfonate in ceramics:
- Binder for Ceramic Bodies: Lignosulfonate can act as a binder in ceramic bodies, which are the clay-based mixtures used to form ceramic products. It helps in binding the clay particles together, providing cohesion and strength during the shaping and drying processes. Lignosulfonate aids in preventing cracking and improving the workability of ceramic bodies.
- Deflocculant: Lignosulfonate is often used as a deflocculant in ceramic suspensions or slips. It disperses and separates the clay particles, reducing their attraction and preventing flocculation. This property improves the fluidity and stability of the ceramic suspensions, allowing for better casting, slip casting, or extrusion processes.
- Greenware Strengthener: Lignosulfonate can help strengthen greenware, which refers to the unfired, dried ceramic products. By acting as a binding agent, it enhances the mechanical integrity of greenware, reducing the risk of breakage or deformation during handling or transportation.
- Glaze Additive: Lignosulfonate can be used as an additive in ceramic glazes. It helps in suspending and dispersing the glaze particles, preventing settling or sedimentation. Lignosulfonate promotes uniform application and adherence of glazes to ceramic surfaces, ensuring consistent and desirable glaze effects.
- Slip Casting Aid: Lignosulfonate is often employed as an additive in slip casting processes. It improves the stability and flowability of the ceramic slip, facilitating the casting of intricate or detailed ceramic shapes. Lignosulfonate helps in achieving uniform thickness and minimizing defects in slip-cast ceramics.
- Kiln Furniture Coating: Lignosulfonate can be used as a coating for kiln furniture, such as shelves or setters, in ceramic firing processes. It helps in preventing sticking or adhesion of ceramic products to the kiln furniture during firing, ensuring easy removal and reducing damage or deformation.
When using lignosulfonate in ceramics, it’s important to consider the specific application, dosage, and compatibility with other ceramic materials. Manufacturers’ guidelines and recommendations should be followed to ensure optimal and safe use of lignosulfonate in ceramic production processes.