pt - doped fe2o3 thick film sensors
pt - doped fe2o3 thick film sensors
... responses of the undoped and 2 wt% Pt- doped ␣-Fe
2
O
3
sensors to various gases at their optimum operating temperatures
are compared in Fig. 7. The responses of 2 wt% Pt- doped -
Fe
2
O
3
sensor ... properties of
the Pt- doped ␣-Fe
2
O
3
.
To further ascertain the oxidation state of Fe and Pt in 2 wt%
Pt/ ␣-Fe
2
O
3,
XPS spectra were recorded after long-term expo-
Y. Wang et...
gas sensing properties of wo3 doped rutile tio2 thick film at high operating temperature
... Gas sensing properties of WO
3
doped rutile TiO
2
thick film at high
operating temperature
Sung-Eun Jo, Byeong-Geun Kang, Sungmoo Heo, Soonho Song, Yong-Jun Kim
*
School of Mechanical Engineering, ... Introduction
Semiconductor gas sensors can detect oxidizing and reducing
gases by measuring the conductance changes in the surface phe-
nomena in terms of gas adsorption and desorption [1,2...
low-temperature h2s sensors based on ag-doped fe2o3 nanoparticles
... of
␣-Fe
2
O
3
.
The specific surface areas (S
BET
) of the undoped and Ag-
doped ␣-Fe
2
O
3
with different Ag content were measured by
N
2
-sorption analysis. Asshown in Table 1, theundoped ␣-Fe
2
O
3
has ... relatively lower than that of Pt- doped one, but a little higher
than that of Au- and Pd -doped ␣-Fe
2
O
3
. Since Ag is cheaper
than Au, Pt and Pd, the present Ag/␣-Fe
2
O
3
sens...
wo3 thick-film gas sensors
... technology commonly em-
ployed for thick- film hybrid circuits production. The
fabrication of planar-type WO
3
-based thick- film sensors
for on-line monitoring of NO concentrations in atmo-
sphere and in ... reserved.
Keywords
:
NO sensors; Tungsten trioxide; Thick- film sensors; Screen printing
1. Introduction
The aim of this work is to describe the behaviour of
thick- film NO sensors...
gas sensing properties of metal - organics derived pt dispersed - tio2 thin film fired in nh3
... the TiO Pt film
2
is a little more reduced than the TiO film, but the
2
resistance of the TiO Pt film in air becomes extremely
2
high compared with that of the TiO film because elec-
2
trons ... elec-
2
trons in TiO transfer to oxygen adsorbed on active Pt in
2
the TiO Pt film.
2
In the case of the TiO Pt film, the resistance of the
2
film fired in NH was compared with that...
gas sensing properties of nanoparticle indium - doped wo3 thick films
... pure and In -doped WO
3
thick films was evaluated from the diffraction line of (00 2)
Table 3
Chemical element distribution in the indium -doped WO
3
thick films
Indium concentration in
WO
3
thick films ... Seal, Inverse-catalyst-effect
observed for nanocrystalline -doped tin oxide sensor at lower operat-
ing temperatures, Sens. Actuators B 104 (2005) 223–231.
[11] A. Salehi, M. Gholiza...
aluminum-doped tio2 nano-powders for gas sensors
... 800
◦
C
Sample (hkl)-Values
(101) (200)
d-Spacing (
˚
A) Shift (%) d-Spacing (
˚
A) Shift (%)
Pure TiO
2
3.5215 0 1.8994 0
5 wt.% Al -doped 3.5113 0.29 1.8890 0.55
7.5 wt.% Al -doped 3.4964 0.71 ... oxides,
SnO
2
-based sensors are the most widely used. As gas sensi-
tive resistors, these sensors show good sensitivity and selectivity
below 250
◦
C. However, at temperatures >250
◦
C,...
facile synthesis of porous a - fe2o3 nanorods and their application in ethanol sensors
... thermal analysis, X-ray powder diffraction, transmission electron microscopy
(TEM), high-resolution TEM, and N
2
adsorption-desorption analysis techniques. The as-prepared porous
R-Fe
2
O
3
nanorods ... toxic
gases.
3 8-4 2
It is generally accepted that the sensing mechanism
of the R-Fe
2
O
3
-based sensor belongs to the surface-controlled
type. The gas-sensing properties of an R-Fe
2
O
3
-...
Thực trạng và giải pháp nâng cao hiệu quả tài trợ XNK tại Ngân hàng ĐT & PT chi nhánh Hà Nội.doc
... được đặt tại số
4B Lê Thánh Tông-Phường Phan Chu Trinh- Quận Hoàn Kiếm-Hà Nội.
51 năm trước, Ngân hàng Kiến thiết Hà Nội (tiền thân của Ngân hàng ĐT &
PT Thành phố Hà Nội ngày nay) nằm ... thành Ngân hàng ĐT &
PT Hà Nội.
Từ ngày thành lập tới cho tới năm 1995, Ngân hàng ĐT & PT Hà Nội đã
trải qua 3 giai đoạn phát triển cơ bản như sau:
-Giai đoạn 195 7-1 960: Phục vụ côn...
GIẢI PHÁP HOÀN THIỆN VÀ PHÁT TRIỂN HOẠT ĐỘNG THANH TOÁN QUỐC TẾ THÔNG QUA PHƯƠNG THỨC TÍN DỤNG CHỨNG TỪ TẠI NHĐT&PT HÀ NỘI.DOC
... vệ sinh
- Giấy chứng nhận kiểm định động vật (veterinary certificate)
- Giấy chứng nhận kiểm định thực vật (phytosanitary certificate)
- Giấy chứng nhận vệ sinh (sanitary certificate)
- Giấy chứng ... mua bán vòng vèo, NHĐT& ;PT Việt Nam, quy định: các chi nhánh
NHĐT& ;PT không đợc bán ngoại tệ cho các chi nhánh trong cùng hệ thống
15
* Các chứng từ hải quan
- Gi...
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- processes for making film less than 0 005 in thick
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- for the formation of thick oil film in hydrodynamic lubricated bearings
- mode sensors and switches
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