Mechanical and Electrical Properties of Y-TZP/ZrB2 Composite

2012 ◽  
Vol 576 ◽  
pp. 228-231 ◽  
Author(s):  
M. Amiriyan ◽  
W.J. Kelvin Chew ◽  
Ramesh Singh ◽  
R. Tolouei ◽  
M.A. Hassan ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Materials Science ◽  
Sintering Temperature ◽  
Tetragonal Zirconia ◽  
Cost Effective ◽  
Argon Atmosphere ◽  
Mechanical And Electrical Properties ◽  
Mechanics Of Materials ◽  
Processing Techniques ◽  
Sintering Method

Over the last three decades, most of the efforts in mechanics of materials science have been focused to develop tougher and stronger ceramics via cost effective processing techniques. In the present work, 3 mol % Yttria-stabilized tetragonal zirconia (3Y-TZP) composites with 25 wt. % of ZrB2 was prepared by pressureless sintering method in argon atmosphere over the temperature range of 1350-1550°C for one hour holding time. The influences of zirconium diboride addition in the zirconia matrix, as well as the sintering temperature, on the densification, phase stability and electrical properties of sintered samples have been studied. The results revealed that electrical resistivity values is very low (high electrical conductivity) when 25 wt. % of ZrB2 is incorporated to pure 3Y-TZP.

Densification and Mechanical Properties of Y-TZP/25 wt. % ZrB2 Composite

2012 ◽  
Vol 59 (2) ◽  
Author(s):  
E. M. Mahdi ◽  
S. Ramesh ◽  
M. Amiriyan ◽  
R. Tolouei ◽  
S. Meenaloshini ◽  
...  
Keyword(s):  
Materials Science ◽  
Sintering Temperature ◽  
Tetragonal Zirconia ◽  
Cost Effective ◽  
Argon Atmosphere ◽  
Pressureless Sintering ◽  
High Electrical Conductivity ◽  
Mechanics Of Materials ◽  
Processing Techniques ◽  
Sintering Method

Over the last three decades, most of the efforts in mechanics of materials science have been focused to develop tougher and stronger ceramics via cost effective processing techniques. In the present work, 3 mol % Yttria-stabilized tetragonal zirconia (3Y-TZP) composites with 25 wt. % of ZrB2 was prepared by pressureless sintering method in argon atmosphere over the temperature range of 1350-1550°C for one hour holding time. The influences of zirconium diboride addition in the zirconia matrix, as well as the sintering temperature, on the densification, phase stability and electrical properties of sintered samples have been studied. The results revealed that electrical resistivity values is very low (high electrical conductivity) when 25 wt. % of ZrB2 is incorporated to pure 3Y-TZP.

Pressureless Sintering of Electro-Conductive Zirconia Composites

2011 ◽  
Vol 694 ◽  
pp. 304-308 ◽  
Author(s):  
Mahdi Amiriyan ◽  
Singh Ramesh ◽  
Iis Sopyan ◽  
Meenaloshini Satgunam ◽  
Ranna Tolouei ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Phase Stability ◽  
Sintering Temperature ◽  
Tetragonal Zirconia ◽  
Zirconium Diboride ◽  
Inert Atmosphere ◽  
Pressureless Sintering ◽  
Zirconia Composites ◽  
Sintering Method

In the present work, 3 mol% Yttria-stabilized tetragonal zirconia (Y-TZP) composite containing 25 wt.% of zirconium diboride (ZrB2) was prepared via pressureless sintering method in an inert atmosphere over the temperature range of 1350-1550°C for one hour. The effect of zirconium diboride content in the zirconia matrix, as well as the sintering temperature on densification, phase stability and electrical properties of sintered samples have been studied. The results revealed that there was a significant increased in electrical conductivity of sintered samples when 25 wt.% of ZrB2 is incorporated into Y-TZP matrix.

Physical, Mechanical and Electrical Properties of W-20 wt.% Cu Composite Produced by Liquid Phase Sintering Process

2014 ◽  
Vol 879 ◽  
pp. 21-26
Author(s):  
Fauzi Ismail ◽  
Mohd Asri Selamat ◽  
Norhamidi Muhamad ◽  
Abu Bakar Sulong ◽  
Nurzirah Abdul Majid
Keyword(s):  
Particle Size ◽  
Liquid Phase ◽  
Electrical Properties ◽  
Microstructure Evolution ◽  
Sintering Temperature ◽  
Cold Isostatic Pressing ◽  
Liquid Phase Sintering ◽  
Sintering Process ◽  
Composite Powders ◽  
Mechanical And Electrical Properties

In this study, the effect of sintering temperature on the properties of tungsten-copper (W-Cu) composite produced by liquid phase sintering (LPS) process has been investigated. W-20 wt.% Cu composite powders with particle size less than 1 μm was prepared by cold compaction and followed by cold isostatic pressing. The green specimens were then sintered under nitrogen based atmosphere in the temperature range of 1100°C to 1300°C. The sintering studies were conducted to determine the extent of densification and corresponding to microstructure changes. In addition, the properties of the sintered specimens such as physical appearance, microstructure evolution, mechanical and electrical properties were presented and discussed.

Effect of Sintering Temperature on Mechanical and Electrical Properties of Lead-Free Bi0.5(Na0.4K0.1)Ti0.98Zr0.02O3 Piezoelectric Ceramics

2019 ◽  
Vol 798 ◽  
pp. 212-217 ◽  
Author(s):  
Pichitchai Butnoi ◽  
Supalak Manotham ◽  
Tawee Tunkasiri
Keyword(s):  
Electrical Properties ◽  
Phase Formation ◽  
Sintering Temperature ◽  
Secondary Phase ◽  
Piezoelectric Ceramics ◽  
Xrd Analysis ◽  
Microscopy Study ◽  
Lead Free ◽  
Mechanical And Electrical Properties ◽  
Maximum Dielectric Constant

Effect of sintering temperatures on phase formation, mechanical and electrical properties of lead-free Bi0.5(Na0.8K0.2)0.5Ti0.98Zr0.02O3 or BNKTZ piezoelectric ceramics were investigated. The BNKTZ ceramics were prepared via a conventional solid-state sintering technique under various sintering temperature range 1100-1150°C for 2 h. The phase formation and microstructure of the ceramics were examined using X-ray diffraction (XRD) and scanning electron microscopy (SEM) method, respectively. XRD analysis indicated that all samples exhibited a single perovskite structure and no secondary phase. SEM microscopy study revealed an increase in grain size with increasing sintering temperature. The maximum values of density and maximum dielectric constant of the ceramics sintered at 1125 °C were 5.79 g/cm3 and 3446, respectively. In addition, the ceramics sintered at 1125 °C showed highest mechanical properties (HV = 4.32 GPa, HK = 5.87 GPa, E = 143 GPa and KIC = 1.30 MPa.m1/2). The highest values of ferroelectric and piezoelectric were found at this sintering temperature.

The Effects of K/Na Ratio on the Electrical Properties of (Li, Sb, Ta) Modified KNN Piezoelectric Ceramics at Reduced Temperature with KNbO3 as Sintering Aid

2014 ◽  
Vol 887-888 ◽  
pp. 299-304
Author(s):  
Meng Meng Jia ◽  
Jian Ma
Keyword(s):  
Solid State ◽  
Electrical Properties ◽  
Sintering Temperature ◽  
Piezoelectric Ceramics ◽  
Lead Free ◽  
Sintering Aid ◽  
Solid State Sintering ◽  
Sintering Method ◽  
Reduced Temperature

0.95(Na0.95-xKxLi0.05)(Nb0.90Sb0.05Ta0.05)O3-0.05KNbO3 lead-free piezoelectric ceramics were prepared by the conventional solid-state sintering method, the effects of K/Na ratio on the structure and electrical properties of the ceramics were studied in detail. The results show that the addition of the pre-calcined KNbO3 powder as sintering aid is very effective to improve the density and sinterability, and the ceramics could be well sintered at reduced temperature of 1060 °C as compared with the relatively higher sintering temperature of Li, Sb, Ta modified KNN ceramics reported in the literature at 1100-1220 °C. The ceramics with x=0.44 possess the optimal properties: d33=231 pC/N, kp= 47 %, Pr= 22 μC/cm2, and Ec= 11.4 kV/cm.

Influence of Sintering Temperature on Electrical Properties of Modified-PZT Piezoelectric Ceramics

2016 ◽  
Vol 872 ◽  
pp. 97-102
Author(s):  
Pharatree Jaita ◽  
Ratabongkot Sanjoom ◽  
Chatchai Kruea-In ◽  
Tawee Tunkasiri ◽  
Gobwute Rujijanagul
Keyword(s):  
Electrical Properties ◽  
Piezoelectric Properties ◽  
Sintering Temperature ◽  
Secondary Phases ◽  
Xrd Pattern ◽  
Mechanical And Electrical Properties ◽  
Low Field ◽  
Higher Temperature ◽  
Dominant Phase ◽  
Ferroelectric And Piezoelectric Properties

In this research, the effects of sintering temperature on phase structure, densification, microstructure, mechanical and electrical properties of modified-PZT ceramics were investigated. All ceramics were prepared by a conventional mixed oxide amend sintered at various temperatures from 1150 - 1250°C. XRD pattern indicated that completely solid solution occurred for all samples and the ceramics exhibited a single perovskite without any secondary phases. At lower sintering temperature, the dominant phase was rhombohedral while tetragonal phase became dominant at higher temperature. Grain size tended to increase with increasing sintering temperature. The dielectric, ferroelectric and piezoelectric properties were also increased with increasing sintering temperature. In addition, the highest low field d33 of 620 pC/N of was observed for the 1250°C sample.

scholarly journals Preparation and properties of B4C-TiB2 ceramics prepared by spark plasma sintering

2020 ◽  
Author(s):  
Jingzhe Fan ◽  
Weixia Shen ◽  
zhuangfei Zhang ◽  
Chao Fang ◽  
Yuewen Zhang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Electrical Properties ◽  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
Composite Ceramics ◽  
Powder Mixtures ◽  
Mechanical And Electrical Properties ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Ceramic Density

Abstract By doping titanium hydride (TiH2) into boron carbide (B4C), a series of B4C + x wt% TiH2 (x = 0, 5, 10, 15 and 20) composite ceramics were obtained through spark plasma sintering (SPS). The effects of sintering temperature and the amount of TiH2 additive on the microstructure, mechanical and electrical properties of the sintered B4C-TiB2 composite ceramics were investigated. Powder mixtures of B4C with 0−20 wt% TiH2 were heated from 1400 to 1800 °C for 20 minutes under 50 MPa. The results indicated that higher sintering temperatures contributed to greater ceramic density. With increasing TiH2 content, titanium diboride (TiB2) formed between the TiH2 and B4C matrix. This effectively improved Young’s modulus and fracture toughness of the composite ceramics, significantly improving their electrical properties: the electrical conductivity reached 114.9 S·cm−1 at 1800 °C when x = 20. Optimum mechanical properties were obtained for the B4C ceramics sintered with 20 wt% TiH2, which had a relative density of 99.9 ± 0.1%, Vickers hardness of 31.8 GPa and fracture toughness of 8.5 MPa·m1/2. The results indicated that the doping of fine Ti particles into the B4C matrix increased the conductivity and the fracture toughness of B4C.

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