The present invention relates to a novel method for producing ceramic materials, in particular fireproof materials with reduced specific weight. In particular, the invention relates to a method for producing light, fireproof materials with non-coherent pores based on shaped and non-shaped materials. These materials can be used as a working lining in high-temperature applications. The method is based on the generation of spherical, closed and insulated pores in the material structure. The pores are generated with a pore diameter adjustable in a targeted manner using polymer particles, in particular polymethacrylates, in particular polymers and/or copolymers produced by means of suspension polymerisation as a combustible shaping means. The polymers and/or copolymers are spherical with a defined diameter. The introduction of insulated spherical pores enables ceramic materials to be produced with a partially significantly reduced specific weight and improved resistance to corrosion and better mechanical stability when compared to the prior art. The specific closed pore system simultaneously contributes to the reduction of the thermal conductivity of the ceramic materials. In addition, the novel method provides the benefit that there is no danger of harmful black cores forming even when producing thick-walled ceramic products.