At what temperature does Ceraset Polysilazane 20 or Ceraset Polyureasilazane convert to a ceramic?

Cured Ceraset Polysilazane 20 or Ceraset Polyureasilazane will GRADUALLY convert to an amorphous, non-glassy ceramic material upon heating to 1,000° C in either air or an inert atmosphere. The exact composition which is obtained at 1,000° C depends on the composition of the pyrolysis atmosphere. The conversion to a ceramic, however, is not precipitous. As a cured sample of Ceraset Polysilazane 20 or Ceraset Polyureasilazane is heated to 1,000° C it slowly condenses, first with the evolution of ammonia, then with the evolution of (mainly) methane, and finally with the evolution of small amounts of hydrogen gas to generate the final ceramic. Within different temperature regimes in this condensation process Ceraset Polysilazane 20 or Ceraset Polyureasilazane will have different degrees of "polymeric" versus "ceramic" characteristics.  more