This invention relates to novel pyrazolylpyrimidines of the formulain which R1, R2, X, n, Y, Z and R have the meanings given in the disclosure, to a plurality of processes for preparing these substances, and to their use for controlling pests. A bond pad for connection to a housing and the upper contact are parts of the same metallization layer that are directly adjacent to one another. Also disclosed is a boron modified water glass geopolymer composition that is compatible with ceramic particulate material such as cordierite and fused silica.