Temperature dependence of the bulk modulus of solids in the magnesium oxide-aluminum oxide (AlO1.5)silicon dioxide system

1985 ◽  
Vol 89 (12) ◽  
pp. 2682-2687 ◽  
Author(s):  
Reed A. Howald ◽  
Richard D. Jones ◽  
Ahmed B. Rezvani ◽  
Bimalendu N. Roy ◽  
Matthew J. Scanlon ◽  
...  
Keyword(s):  
Aluminum Oxide ◽  
Silicon Dioxide ◽  
Bulk Modulus ◽  
Temperature Dependence ◽  
Magnesium Oxide

Temperature dependence of the etch rate and selectivity of silicon nitride over silicon dioxide in remote plasma NF3/Cl2

1995 ◽  
Vol 67 (13) ◽  
pp. 1902-1904 ◽  
Author(s):  
J. Staffa ◽  
D. Hwang ◽  
B. Luther ◽  
J. Ruzyllo ◽  
R. Grant
Keyword(s):  
Silicon Nitride ◽  
Silicon Dioxide ◽  
Temperature Dependence ◽  
Etch Rate ◽  
Remote Plasma

scholarly journals Effect of reduced Al2O3 mole ratio on fabrication of cordierite ceramic by solid-state sintering method

2019 ◽  
Vol 51 (2) ◽  
pp. 189-197
Author(s):  
Ye Li ◽  
Hengze Zhao
Keyword(s):  
Silicon Dioxide ◽  
Magnesium Oxide ◽  
Crystallization Process ◽  
Raw Materials ◽  
Linear Shrinkage ◽  
Pore Connectivity ◽  
Mullite Phase ◽  
Cordierite Ceramic ◽  
Solid State Sintering ◽  
Sintering Method

Cordierite ceramic was fabricated by reducing Al2O3 mole ratio from 2.0 to 1.4 with kaolin, silicon dioxide and magnesium oxide as the raw materials. The effect of reduced Al2O3 mole ratio on the sintering behaviors, phase transition, main properties, and microstructure were characterized in detail. The results show that cordierite phase becomes the main crystallization phase at 1300?C, and mullite phase can be consumed to produce cordierite phase by reducing Al2O3 mole ratio. But additional quartz phase still exists until 1400?C. Moreover, the open porosity, pore connectivity and pore size increase as Al2O3 mole ratio reduces from 2.0 to 1.4 while the linear shrinkage percent and bulk density decrease with the reduced Al2O3. It is considered that the sintering activity of the raw materials at low temperature decreases due to the increase of chemically pure magnesium oxide and silica with the decrease of Al2O3 mole ratio, while the crystallization process, pore growth and cordierite phase rather than the liquid phase control the densification process at high temperature.

Temperature Dependences of the Elastic Constants of Precipitation-Hardened Aluminum Alloys 2014 and 2219

1977 ◽  
Vol 99 (2) ◽  
pp. 181-184 ◽  
Author(s):  
D. T. Read ◽  
H. M. Ledbetter
Keyword(s):  
Aluminum Alloys ◽  
Shear Modulus ◽  
Bulk Modulus ◽  
Temperature Dependence ◽  
Elastic Properties ◽  
Elastic Constants ◽  
Ultrasonic Pulse ◽  
Young’S Moduli ◽  
Temperature Dependences ◽  
Sound Velocities

Elastic properties of precipitation-hardened aluminum alloys 2014 and 2219 were studied between 4 and 300 K using ultrasonic pulse techniques. Both the longitudinal and transverse sound velocities were measured. Also reported are the Young’s modulus, shear modulus, bulk modulus, and Poisson’s ratio. For both alloys, the Young’s moduli are about ten percent higher than for unalloyed aluminum, and they increase about ten percent on cooling from 300 to 4 K. All the elastic constants show normal temperature dependence.

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