Modern high-density oxide ceramics with a controlled microstructure. Part IV. Technological methods for manufacturing highly disperse oxide powders for multicomponent oxide ceramics

Refractories ◽  
1996 ◽  
Vol 37 (9) ◽  
pp. 295-302
Author(s):  
E. S. Lukin
Keyword(s):  
High Density ◽  
Oxide Ceramics ◽  
Multicomponent Oxide ◽  
Oxide Powders ◽  
Technological Methods ◽  
Disperse Oxide

Metallization Behavior in Aluminum Nitride Electronic Packages

1990 ◽  
Vol 203 ◽  
Author(s):  
Ellice Y. Luh ◽  
Leonard E. Dolhert ◽  
Jack H. Enloe ◽  
John W. Lau
Keyword(s):  
Thermal Conductivity ◽  
Dielectric Properties ◽  
Aluminum Nitride ◽  
High Density ◽  
High Thermal Conductivity ◽  
Electronic Packages ◽  
Oxide Ceramics ◽  
Chemical Behavior ◽  
Hermetic Seal ◽  
Silicon Based

ABSTRACTCharacteristics such as CTE close to that of silicon, high thermal conductivity, and good dielectric properties make aluminum nitride (AIN) an excellent dielectric for packaging silicon-based high density multichip interconnects. However, there remains many aspects of its behavior that have not been characterized. One such example is the behavior of the various metallizations used within a package. As with A12O3, these metallizations must contribute toward a hermetic seal separating the die from the environment. However, the chemical behavior of the metallization systems used for A12O3 may not be compatible with non-oxide ceramics such as AIN. Consequently, these chemical interactions are investigated in view of the requirements for each application within electronic packages. Hermeticity testing results are also included in the discussion.

The Effect of Sb Content on Spark Plasma Sintered High-Density Antimony-Doped Tin Oxide Ceramics

2011 ◽  
Vol 687 ◽  
pp. 204-208 ◽  
Author(s):  
Qi Zhong Li ◽  
Dong Ming Zhang ◽  
Guo Qiang Luo ◽  
Cheng Zhang Li ◽  
Qiang Shen ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Tin Oxide ◽  
Sintering Temperature ◽  
Glass Melting ◽  
High Density ◽  
Oxide Ceramics ◽  
Sintering Aids ◽  
Maximum Value ◽  
Plasma Sintering ◽  
Spark Plasma

Spark plasma sintering (SPS) is a newly developed technique that enables poorly sinterable tin oxide powder to be fully densified. Sintering without sintering aids is of great importance when SnO2ceramics are used as electrodes in the glass melting industry and aluminum electrometallurgy. Dense and good-conductive Antimony-doped SnO2 ceramics can be achieved by SPS at a lower sintering temperature and in a shorter time. When the Sb2O3concentration is 1.0 mol%, the densities of the samples reach their maximum value, which is 98.2% of the theoretical value. When the content of Sb2O3was 2.44mol%, SnO2ceramics with densities 97.6% can be obtained at 800°C-1000°C, and the resistivity was about 5.19×10-2Ω.cm at the sintering temperature of 1000°C. Defined amount of Sb3+used in our research are beneficial to low the sintering temperature and promote the densification of SnO2ceramics

Electrochemically Prepared Polymeric Precursors for the Formation of Non-Oxide Ceramics and Coatings

1992 ◽  
Vol 271 ◽  
Author(s):  
Ralph Zahneisen ◽  
Christian Rüssel
Keyword(s):  
Materials Science ◽  
Amorphous Solids ◽  
Metal Nitrides ◽  
Oxide Ceramics ◽  
Metal Carbides ◽  
Organic Amine ◽  
Subsequent Formation ◽  
Electrochemical Preparation ◽  
Polymeric Precursors ◽  
Oxide Powders

ABSTRACTThe electrochemical preparation of polymeric precursors and the subsequent formation of non-oxide powders, ceramics and coatings is described. The metals were anodically dissolved in an electrolyte consisting of a primary organic amine, acetonitrile as a solvent, and a tetraalkylammonium salt. This procedure led to the formation of polymeric precursor solutions. Removal of the excess organic compounds resulted in the formation of polymeric amorphous solids. Pyrolysis was carried out at temperatures in the range of 750 to 1100°C. In an atmosphere of ammonia, metal nitrides were formed, while calcination under nitrogen or argon led to carbonitrides or to carbides, depending on temperature and the metal used. Up to now, this route has been applied to Al, Ti, Zr, Cr, Ta, Mg, Ca and Y, and it is suppossed, that this route is applicable to the formation of many metal carbides and nearly all metal nitrides relevant for materials science.

Development and Ecodisaster: A Lesson from Cochin Backwater System

1984 ◽  
Vol 16 (3-4) ◽  
pp. 707-716
Author(s):  
K P Balakrishnan ◽  
C B Lalithambika Devi
Keyword(s):  
Agricultural Production ◽  
Human Population ◽  
Large Scale ◽  
Industrial Effluents ◽  
The State ◽  
High Density ◽  
Economic Progress ◽  
Animal Communities ◽  
Technological Methods ◽  
Diverse Plant

Kerala, with a unique climate, has rich and varied ecosystems with luxuriant and diverse plant and animal communities. This has led to a high density of human population. The State has resorted to modern technological methods for its economic development which include industrialization and improvement of agricultural production. The establishment of a modern port at Cochin has transformed the region into the industrial capital of the State. Simultaneous with economic progress, the environmental conditions have become deranged due to large scale shipping operations. Of late the environmental problems are increasing in the highly productive backwater system, due to industrial effluents. How developmental programs can undermine the ecological balance and cause deleterious effects as well as unforseen consequences are well illustrated by the deltaic region of Kuttanad - “the rice bowl of Kerala”. Dams, at the upper reaches of the rivers, provide power for industry and water for irrigation. But inadvertent denudation of the forests due to continuous human settlement and related activities will not only damage the dams, the industry and agriculture but also the climate of the region. The high density of population exerts undue pressure on the ecosystem whether it be terrestrial, aerial or aquatic and causes serious imbalances.

Sign in / Sign up

Export Citation Format

Share Document