Gas carburizing of steel with furnace atmospheres formedIn Situ from propane and air: Part III. Control of furnace atmosphere composition with a zirconia oxygen sensor

1980 ◽  
Vol 11 (3) ◽  
pp. 485-491 ◽  
Author(s):  
C. A. Stickels ◽  
C. M. Mack ◽  
J. A. Pieprzak
Keyword(s):  
Oxygen Sensor ◽  
Furnace Atmosphere ◽  
Atmosphere Composition ◽  
Gas Carburizing

Effect of furnace atmosphere and silica content on the consolidation behaviour of magnesia partially stabilised zirconia

1990 ◽  
Vol 48 (4) ◽  
pp. 1056-1057
Author(s):  
J. Drennan ◽  
R.H.J. Hannink ◽  
D.R. Clarke ◽  
T.M. Shaw
Keyword(s):  
Liquid Phase ◽  
Silica Content ◽  
Liquid Phase Sintering ◽  
Furnace Atmosphere ◽  
Boundary Phase ◽  
Analytical Electron ◽  
Analytical Electron Microscope ◽  
Series Of Experiments ◽  
Compositional Gradients ◽  
Mobile Liquid

Magnesia partially stabilised zirconia (Mg-PSZ) ceramics are renowned for their excellent nechanical properties. These are effected by processing conditions and purity of starting materials. It has been previously shown that small additions of strontia (SrO) have the effect of removing the major contaminant, silica (SiO2).The mechanism by which this occurs is not fully understood but the strontia appears to form a very mobile liquid phase at the grain boundaries. As the sintering reaches the final stages the liquid phase is expelled to the surface of the ceramic. A series of experiments, to examine the behaviour of the liquid grain boundary phase, were designed to produce compositional gradients across the ceramic bodies. To achieve this, changes in both silica content and furnace atmosphere were implemented. Analytical electron microscope techniques were used to monitor the form and composition of the phases developed. This paper describes the results of our investigation and the presentation will discuss the work with reference to liquid phase sintering of ceramics in general.

A singlet oxygen sensor for photodynamic cancer therapy

1999 ◽  
Author(s):  
Philip B. Keating ◽  
Michael F. Hinds ◽  
Steven J. Davis
Keyword(s):  
Cancer Therapy ◽  
Singlet Oxygen ◽  
Oxygen Sensor ◽  
Photodynamic Cancer Therapy

The Upper Atmosphere Composition Spectrometer.

1986 ◽  
Author(s):  
David C. Kayser ◽  
William T. Chater ◽  
Charles K. Howey ◽  
James B. Pranke
Keyword(s):  
Upper Atmosphere ◽  
Atmosphere Composition
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