Sodium Feldspar for Ceramic Flux
MAXUM®
MAXUM® is a ceramic-grade sodium feldspar produced from high-purity feldspathic feedstock. As a powerful ceramic flux, MAXUM promotes glassy phase development during firing and contributes alkali content that works with available silica to strengthen and stabilize the finished piece.
For ceramic manufacturers producing traditional whitewares, ceramic ware, enamels and glazes, MAXUM delivers fluxing performance with advantages in fired strength, surface quality and color development. Its low iron content and high reflectance make it a strong choice for ultra-white bodies and bright, vivid colors. In glaze formulations, MAXUM helps regulate melt viscosity to support a smoother, more even surface.
Product Highlight
MAXUM sodium feldspar is engineered for ceramic applications where flux activity, fired appearance and finished strength are critical. During firing, MAXUM helps accelerate the transition into the glassy phase, supporting the densification and stabilization of ceramic bodies and glazes.
Because MAXUM initiates at lower temperatures, it can contribute to improved impact strength, flexural strength and resistance to mechanical shock or thermal stress. In glazes, MAXUM helps control melt behavior and surface finish while adding hardness, durability and brilliance to the final fired product.
Mineral:
Sodium feldspar
Product category:
Ceramic flux
Applications:
Ceramic whitewares, ceramic ware, enamels and glazes
Efficient fluxing action:
MAXUM acts as a highly reactive ceramic flux, helping initiate glassy phase development during firing and supporting ceramic body maturation.
Stronger fired pieces:
By contributing alkali content that combines with available silica, MAXUM can help strengthen and stabilize the finished ceramic piece.
Lower-Temperature activity:
MAXUM begins fluxing at lower temperatures, enabling manufacturers to support fired performance while improving the transition to the glassy phase.
Impact and flexural strength:
The fluxing performance of MAXUM can improve impact strength and flexural strength, helping finished ceramic products resist mechanical stress.
Bright fired color:
Low iron content and high reflectance make MAXUM well suited for ultra-white ceramic bodies and bright, vivid fired colors without added opacifiers or enhancers.
Glaze surface quality:
In glaze formulations, MAXUM helps regulate melt viscosity for a smooth, even surface finish with enhanced hardness and durability.
Customer Support
Covia’s ceramics team can help manufacturers evaluate MAXUM in specific body, enamel or glaze formulations to understand how sodium feldspar contributes to melt behavior, glassy phase development and finished-product performance.
Through technical support and laboratory analysis, Covia helps customers refine raw material selection, troubleshoot firing or glaze challenges and make practical formulation decisions.
Logistics
Covia supports MAXUM customers with established logistics experience and a robust supply network for ceramic raw materials. With packaging options and delivery planning support, Covia helps manufacturers secure the sodium feldspar they need for ongoing ceramic body, enamel and glaze production.
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