| 摘要 |
In order to produce an observation window (7) in reaction vessels, autoclaves, boilers, nuclear reactors and the like, a cubically stabilized zirconium oxide monocrystal can be used. Preferably, calcium, magnesium, yttrium or another transparent element of the heavy lanthanoids is used to stabilize zirconium oxide. Due to the excellent transparency of such observation windows (7) produced by means of a cubically stabilized zirconium oxide moncrystal, they are especially suitable for monitoring processes in situ in closed vessels such as the above-mentioned reaction vessels and the like, the processes being monitored either optically by means of photographic appliances or video appliances (1), or by means of spectroscopic methods. |
