Liquid phase sintering of bimodal size distributed alumina powder mixtures

1996 ◽  
Vol 31 (3) ◽  
pp. 573-579 ◽  
Author(s):  
S. Taruta ◽  
T. Takano ◽  
N. Takusagawa ◽  
K. Okada ◽  
N. Ōtsuka
Keyword(s):  
Liquid Phase ◽  
Liquid Phase Sintering ◽  
Alumina Powder ◽  
Powder Mixtures

The Influence of Production Process Parameters on the Properties W-Ag, Mo-Ag Composites

2007 ◽  
Vol 534-536 ◽  
pp. 1513-1516
Author(s):  
Jan Leżański ◽  
Marcin Madej
Keyword(s):  
Liquid Phase ◽  
Production Process ◽  
Process Parameters ◽  
Liquid Phase Sintering ◽  
Sintering Process ◽  
Powder Mixtures ◽  
Microstructure And Properties ◽  
Silver Additions

Attempts have been made to describe the influence of production process parameters on the microstructure and properties of W - Ag and Mo - Ag composites. The compositions of powder mixtures are W + 30% Ag and Mo + 30%Ag. Silver additions assists densification during sintering by a liquid phase sintering process. The main goal of this work is to compare properties and microstructure of as-sintered and as-infiltrated composites.

Liquid-phase sintering of very fine tungsten-copper powder mixtures

1982 ◽  
Vol 21 (6) ◽  
pp. 447-450 ◽  
Author(s):  
V. V. Panichkina ◽  
M. M. Sirotyuk ◽  
V. V. Skorokhod
Keyword(s):  
Liquid Phase ◽  
Copper Powder ◽  
Liquid Phase Sintering ◽  
Powder Mixtures ◽  
Fine Tungsten

Ionic Conductivity of β"-Alumina Solid Electrolyte Prepared by Liquid Phase Sintering Method

2010 ◽  
Vol 93-94 ◽  
pp. 513-516 ◽  
Author(s):  
Kanita Srisurat ◽  
Anuson Niyompan ◽  
Rungnapa Tipakontitikul
Keyword(s):  
Liquid Phase ◽  
Ionic Conductivity ◽  
Solid Electrolyte ◽  
Conductivity Measurement ◽  
Secondary Phase ◽  
Liquid Phase Sintering ◽  
Alumina Powder ◽  
Dry Pressing ◽  
Ionic Conductivity Measurement ◽  
Sintering Method

Na- β"-alumina solid electrolyte proposed for electric vehicle battery system application was prepared using liquid phase sintering method. Firstly, the Na- β"-alumina powder was prepared according to the formular Na1-xMg2xAl5-xO8 with x = 0.175, calcinations temperature was at 1200 C for 10 h. Calcined powder was milled and mixed with Bi2O3 or CuO in approximate concentration 1, 3 and 5 percent by mole respectively. The uniaxial dry-pressing was employed for green body forming. The green pellets were then sintered at different temperature and dwell time were kept constant for 4 h during the sintering process. Ionic conductivity measurement was performed by impedance analyzer. The XRD characterization on both powder and ceramic show that β"-alumina form as a major phase with tiny amount of the secondary phase β-alumina. The β"/β concentration proportion slightly decrease after sintering. Addition with Bi2O3 or CuO do not lead to phase change and high densification ceramic is obtained. Ionic conductivity of β"-alumina ceramic added with Bi2O3 is higher than that of ceramic with CuO addition. The relative calculated activation energy of the Na+ migration in the former composition is also lower. The highest ionic conductivity measured at 300 C is found in ceramic sample sintered at 1450 C and with 1 mol% of Bi2O3.

Effect of oxygen on the liquid-phase sintering of very fine tungsten-copper powder mixtures

1985 ◽  
Vol 24 (3) ◽  
pp. 197-199
Author(s):  
V. I. Kornilova ◽  
L. D. Konchakovskaya ◽  
V. V. Panichkina ◽  
P. Ya. Radchenko ◽  
V. V. Skorokhod
Keyword(s):  
Liquid Phase ◽  
Copper Powder ◽  
Liquid Phase Sintering ◽  
Powder Mixtures ◽  
Fine Tungsten ◽  
Effect Of Oxygen

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.

Sign in / Sign up

Export Citation Format

Share Document