Preparation of the Al2O3-ZrO2-C Sliding Nozzle Using Recovery Refractory and Improvement of its Performance

2011 ◽  
Vol 291-294 ◽  
pp. 1800-1803
Author(s):  
Lin Tian ◽  
Shu Jiang Chen ◽  
Xiao Ning Zhang ◽  
Guo Hua Li
Keyword(s):  
High Temperature ◽  
Environmental Protection ◽  
Refractory Material ◽  
Metallurgical Industry ◽  
New Materials ◽  
Slag Resistance

Utilization of waste refractory material has attracted much attention due to the development of metallurgical industry and the requirements of environmental protection. This article mainly researched on the Al2O3-ZrO2-C sliding nozzle that prepared using its recovery refractory and some other new materials. The addition of the recovery material leads to the formation of ZrO2compound. The performance of the sliding nozzle is enhanced by controlling its microstructure, including the improvement of strength under cold and high temperature, and increase in slag resistance.

NEUTRON POWDER DIFFRACTION AND OXIDE SUPERCONDUCTORS

1993 ◽  
Vol 07 (16n17) ◽  
pp. 3077-3093 ◽  
Author(s):  
A.W. HEWAT
Keyword(s):  
Heavy Metals ◽  
High Temperature ◽  
Powder Diffraction ◽  
Neutron Powder Diffraction ◽  
Oxide Superconductors ◽  
X Rays ◽  
New Materials ◽  
Oxidation Reduction ◽  
High Temperature Oxide ◽  
Temperature Oxide

Neutron powder diffraction has been essential for understanding the structures of the new high temperature oxide superconductors because of the difficulty in locating oxygen with X-rays in the presence of heavy metals, especially when single crystals are usually not available. This understanding lead to the discovery of new materials. In this paper we will show how it also sheds light on the crystal chemistry of oxide superconductors—the effects of oxidation/reduction, phase separation, pressure etc.

High-Temperature Applications of Intermetallic Compounds

MRS Bulletin ◽  
1996 ◽  
Vol 21 (5) ◽  
pp. 30-36 ◽  
Author(s):  
David P. Pope ◽  
Ram Darolia
Keyword(s):  
United States ◽  
High Temperature ◽  
Intermetallic Compounds ◽  
Weight Ratio ◽  
The United States ◽  
Material System ◽  
National Defense ◽  
New Materials ◽  
Solid Solution Matrix ◽  
High Level

One of the greatest challenges currently facing the materials community is the need to develop a new generation of materials to replace Ni-based superalloys in the hot sections of gas-turbine engines for aircraft-propulsion systems. The present alloys, which have a Ni-based solid-solution matrix surrounding Ni3Al-based precipitates, are currently used at temperatures exceeding 1100°C, which is over 80% of the absolute melting temperature. Since Ni3Al melts at 1395°C and Ni at 1453°C, it is clear that significantly higher operating temperatures, with the attendant improvements in efficiency and thrust-to-weight ratio, can only be attained by the development of an entirely new materials system. This problem is a primary reason for the current high level of interest in high-temperature intermetallic compounds.The development of such a material system has important implications for national defense and for spin-offs to civilian technology, as well as for the economy and balance of payments. Obviously it would be a boon to any economy to have these new materials developed domestically, as was the case in the United States for the currently used single-crystal technology applied to Ni-based superalloys. As an example, the aerospace industry is one area where the United States is still the undisputed world leader, with net exports of $29 billion in 1989, twice that of any other U.S. industry.

Combinatorial Study of New Materials Sensing High Temperature

2010 ◽  
Vol 636-637 ◽  
pp. 295-300
Author(s):  
Ya Lin Lu ◽  
Karen A. Reinhardt
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Materials Science ◽  
Oxide Materials ◽  
New Materials ◽  
Suitable Host ◽  
Emission Lifetime ◽  
Remotely Sense ◽  
Rare Earth Doped ◽  
Combinatorial Strategy

Interests in finding new rare-earth doped oxide materials able to remotely sense high temperature have been intensifying in recent years. If applied, advanced combinatorial strategy for materials science should be efficient in finding a suitable host material, and in optimizing a rare earth ion’s doping concentration, luminescence intensity, emission lifetime, etc. This research demonstrates our preliminary effort to apply the advanced combinatorial material strategy to this new area of finding materials for sensing high temperatures.

High-temperature TG/DSC/QMS applications in environmental protection

1996 ◽  
Vol 47 (2) ◽  
pp. 633-642 ◽  
Author(s):  
T. Rampke ◽  
W. -D. Emmerich ◽  
E. Post ◽  
L. Giersig
Keyword(s):  
High Temperature ◽  
Environmental Protection

Synthesis of Copper Containing Zeolites: New, Simple and Efficient Method for Quantitative Exchange

1992 ◽  
Vol 57 (4) ◽  
pp. 809-816 ◽  
Author(s):  
Michel H. Gubelmann ◽  
Michel Guisnet ◽  
Guy Perot ◽  
Yannick Pouilloux
Keyword(s):  
High Temperature ◽  
Efficient Method ◽  
Exchange Capacity ◽  
New Technique ◽  
Water Mixture ◽  
New Materials ◽  
A New Technique ◽  
Hydrolysis Of

A new technique is described which allows the quantitative exchange of copper(II) into ZSM-5 zeolites. The sequence consists of two steps: (i) impregnation of the zeolite with copper(II) in amounts higher than the exchange capacity; (ii) leaching of the copper in excess with respect to the exchange capacity with a chlorobenzene-water mixture at high temperature. The performances of the new materials in the hydrolysis of chlorobenzene, as well as preliminary informations on the nature of the catalyst and the type of mechanism are presented.

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