High-T NOx Sensing Elements Using Conductive Oxides and Pt

2004 ◽  
Author(s):  
David L. West ◽  
Fred C. Montgomery ◽  
Timothy R. Armstrong
Keyword(s):  
Yttria Stabilized Zirconia ◽  
Step Response ◽  
Stabilized Zirconia ◽  
Temperature Range ◽  
Pt Electrodes ◽  
Recovery Times ◽  
Response And Recovery ◽  
Primary Variable

Development of NOx sensing elements intended for operation at T ∼600 °C are described. The elements were fabricated by depositing co-planar La1-x Srx BO3 (B = Cr, Fe) and Pt electrodes on yttria-stabilized zirconia substrates. Characterization of the elements included response to NO2 and NO as well as the [O2] dependence of the NO2 response. Much stronger (∼ 40 mV for 450 ppm NO2 in 7 vol% O2 at 600 °C) sensing responses were observed for NO2 than NO, indicating these elements are best suited for detection of NO2. Pronounced asymmetries were observed between the NO2 step response and recovery times for the elements, with temperature being the primary variable governing the recovery times in the temperature range 500–700 °C.

Characterization of Pt,O2|YSZ electrodes for lambda probes and their ageing in humid atmosphere

2017 ◽  
Vol 84 (10) ◽  
Author(s):  
Elke Flegel ◽  
Corinna Vonau ◽  
Ulrich Guth
Keyword(s):  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Humid Atmosphere ◽  
Impedance Measurements ◽  
Temperature Range ◽  
Partial Pressures

AbstractElectrodes with different microstructures made of platinum and yttria stabilized zirconia (YSZ) were investigated. They were characterized by means of impedance measurements and electrode charging experiments in the temperature range of 450 ℃ to 800 ℃ and in oxygen partial pressures of 0.2 bar down to 10

Design, preparation, and characterization of Yttria-Stabilized Zirconia (YSZ) coatings obtained by electrophoretic deposition (EPD)

2021 ◽  
Author(s):  
Juan Luis Pantoja-Pertegal ◽  
Antonio Díaz-Parralejo ◽  
Antonio Macías-García ◽  
J.Sánchez González ◽  
Eduardo M. Cuerda-Correa
Keyword(s):  
Electrophoretic Deposition ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia

Optical characterization of Pr3+-doped yttria-stabilized zirconia single crystals

1997 ◽  
Vol 56 (10) ◽  
pp. 5856-5865 ◽  
Author(s):  
B. Savoini ◽  
J. E. Muñoz Santiuste ◽  
R. González
Keyword(s):  
Single Crystals ◽  
Optical Characterization ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia

Characterization of silicate sensors on Low Temperature Cofire Ceramic (LTCC) substrates using DSC and XRD techniques

2012 ◽  
Vol 2012 (1) ◽  
pp. 000598-000603
Author(s):  
Mary Ruales ◽  
Kinzy Jones
Keyword(s):  
Low Temperature ◽  
Phase Diagrams ◽  
Cost Effective ◽  
Microelectronics Packaging ◽  
Design Structure ◽  
Recovery Times ◽  
Response And Recovery ◽  
Xrd Techniques ◽  
The Impact

Characterization of Silicate sensors using Differential Scanning Calorimeter (DSC), X-ray Diffraction (XRD) and Scanning Electron microscopy (SEM) is presented. These silicate sensors are based on three primary materials: Li2SiO3, K2SiO3, and CaSiO3. Silicate powders were transform into adequate inks that were added to a Low Temperature Cofire Ceramic (LTCC) substrates with thick film technology using screen printing which continues to offer innovative and cost effective solutions to the increasing demands for higher circuit densities. These silicate sensors are low power-high temperature heated ceramic sensors to detect halogen gases. Every sensor responded to the gas showing stability and reproducibility. Phase diagrams for these silicates were used to produce different combinations. The use of the eutectoid point in the phase diagrams was critical to reduce the operating temperature. Testing and characterization of these silicate sensors is presented. The impact of various parameters (e.g. materials design, structure, properties, performance and processing) for the sensors including their relationships for electronic packaging was reviewed and it was found critical to determine the microelectronics packaging reliability and integrity. The fundamentals of the sensor behavior including the sensitivity as well as response and recovery times were also determined.

Elemental, Thermal, and Structural Characterization of ZnO Doped 8 mol% Yttria-Stabilized Zirconia (8YSZ) Ceramics

2017 ◽  
Vol 888 ◽  
pp. 57-61 ◽  
Author(s):  
Johar Banjuraizah ◽  
Tinesha Selvaraj ◽  
Zainal Arifin Ahmad
Keyword(s):  
Structural Characterization ◽  
Tetragonal Phase ◽  
Monoclinic Phase ◽  
Ionic Conductivities ◽  
Secondary Phase ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Mixed Powder ◽  
Dominant Phase

8 mol% of Yttrium oxide doped Zirconia (8YSZ) is one of the most explored compositions which give high ionic conductivities and good power output at 1000 °C. Generally, dopant was added to improve the sinterability of 8YSZ ceramics. In this present study, granulated 8YSZ powders with multimodal size was mixed with ZnO (0,1,2,3 wt%) using mortar and pestle. The mixed powder was compacted and sintered at 1550°C for 2 hours. 2 distinct endothermic peaks were observed in DTA plot of all samples. However, samples contain high amount of ZnO had a broader endothermic peak which resulted from the melting of ZnO. Rietveld refinement results indicate that the tetragonal phase appeared as the dominant phase for all doped and undoped samples, while cubic and monoclinic phase as the secondary phase. The monoclinic phase decreased as the amount of ZnO increased.

In vitro evaluation of an yttria-stabilized zirconia reinforced nano-hydroxyapatite/polyamide 66 ternary biomaterial: biomechanics, biocompatibility and bioactivity

RSC Advances ◽  
2016 ◽  
Vol 6 (115) ◽  
pp. 114086-114095 ◽  
Author(s):  
Yuling Li ◽  
Hong Li ◽  
Jing Zhang ◽  
Weikang Zhao ◽  
Jieliang Shen ◽  
...  
Keyword(s):  
Tetragonal Zirconia ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Polyamide 66 ◽  
In Vitro Evaluation

The characterization of a novel ternary biomaterial composed of nano-hydroxyapatite/polyamide 66/yttria-stabilized tetragonal zirconia.

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