The ceramic MgAl_2O_4-based humidity sensors. 1. The influence of dispersion and grain dimension of the ceramic humidity sensors from the mixture of MgO and Al_2O_3 on their operation characteristics

摘要

The influence of miscibility-milling, compaction and sintering on the operation characteristics ceramic humidity sensors on the base of the mixture of powders MgO and Al_2O_3(50:50 at./100) with various specific surfaces is studied. It is established that 4 day is the optimal time of miscibity-milling this powders when the specific surface is increased by a factor of four fold. The increase of the miscibility-milling time to 6 day causes the agglomeration of particles and the decrease of the specific surface and operation characteristics of ceramic humidity sensors.