(1)In
2006, Sigma is high temperature furnace manufacturer which the first
domestic electric industry all use ceramic fiber as chamber material .
It is also the first manufacturer that national standards to the maximum
temperature of 1600 ℃ laboratory furnace up to 1700 ℃. Therefore, Sigma
become the well-known experimental furnace brands.
(2)
From 2008, Sigma began to gradually put the 1800℃, 2000℃, 2200℃, 3000℃
experimental furnace as the company's leading product, printed on sigma
supplier directory. Sigma first use Inner Mongolia Rare Earth Research
Institute produced lanthanum chromite heating element, Beijing Iron and
steel Research Institute produced zirconia heat generator in ultra high
temperature laboratory furnace.
(3)
In 2010,Sigma invent the zirconium diboride composite ceramic heating
element. It is not only be used in air atmosphere, also be used in an
oxidizing atmosphere conditions, this technology fills the gaps at home
and abroad. With this heat element production ultra-high temperature
furnace sale in the domestic and international.
(4)
In 2010,Sigma declared ultra-high-temperature furnace won Henan
Province innovation fund of RMB300000, the same year won the Ministry of
Science Innovation Fund RMB600,000.
(5)
During 2009-2014, Sigma has invented the Zirconia sensor, zirconium
diboride composite ceramic sensor, ultra high temperature refractory
alloys thermocouples, zirconium carbide ceramic composite sensor,
zirconium diboride composite ceramic heating element, zirconium carbide
compound ceramic heating element and other more than 20 items ultra-high
temperature patented inventions, this is patent for ultra-high
temperature up to enterprises at home and abroad.
(6)
Since the start of 2013, the Sigma use zirconium diboride composite
ceramic sensor, zirconium diboride composite ceramic heating element in
sapphire crystal growth furnace, has invented a dozen patented
inventions, temperature field gradient law movement - sapphire crystal
growth theory on sapphire industry will be immeasurable. Among them,
zirconium diboride composite ceramic sensor at 2100 ℃ conditions,
long-term use for more than 10 days.
(7)
In 2014, Sigma cooperation with the Shanghai Jiaotong University
developed ultra-high-temperature furnace used in nuclear fuel leak test,
the temperature can reach 2850 ℃.
(8)
In 2015, Sigma cooperation with the China University of Technology
research and development of ultra-high-temperature furnace used in
aerospace engine exhaust testing, the use of temperature can reach 2600
℃, the furnace pressure may be up to 50 atmospheres.
(1)
Sigma original invention zirconium diboride composite ceramic sensor,
zirconium diboride composite ceramic heating element for the development
of ultra-high temperature, ultra-high temperature furnace industry has
laid a foundation for the development. A stable, environmentally
friendly, ultra gentle green forming the field and provide basic
guarantee for the detection of ultra-high temperature performance
material industry.
(2)
Sigma zirconium diboride composite ceramic sensor theory using
temperature can reach 2600 ℃, the actual use should be to 2150 ℃, this
technology uses the highest temperature tungsten-rhenium thermocouples
than the industry, but also higher than 300 ℃, which a contribution to
the ultra-high temperature technology industry is immeasurable.
(3)
Sigma ultra- high temperature heating element, ultra-high temperature
sensor and ultra-high temperature furnace is the basis for the
development of ultra-high temperature equipment industry, it is to lay
the basic theory of ultra-high temperature industry.
7.
Investing more than half a million dollars, we built a 1500m2
ultra-high temperature laboratory, in which you can make sintering test,
hot-pressing test, melting point test, ultra-high temperature material
mechanics property in vacuum,atmosphere and oxidation environment under
1200℃, 1400℃, 1700℃, 1800℃, 2000℃, 2200℃, 2500℃, 3000℃.
Adopted charges, the ultra-high temperature laboratory is open to the
public. Users can entrust us to sinter materials according to their
demands or sinter materials by their own engineer through lease our
ultra-high temperature laboratory. They can also make sintering
experiment of various materials before purchasing equipment.
Ultra-high temperature engineering technology center of Henan Institute of Metrology
In 2011, cooperated with Henan measuring academy of sciences, we
established the ultra-high temperature engineering technology center of
Henan Institute of Metrology, the main subject of which is zirconium
diboride composite ceramic thermocouple’s indexing, verification
regulations of ultra-high temperature thermocouple and test of
ultra-high temperature material’s property.
The ultra-high temperature engineering technology center can be engaged
in testing equipment inspection at range of 1000-3000℃, standard
temperature measurement, calibration and examination of single platinum
rhodium thermocouple, double platinum rhodium thermocouple and various
temperature measuring instruments and performance test of ultra-high
temperature materials.
Our ultra-high temperature products have been exported to South Korea,
Brazil, France, Russia, Iran, Sri Lanka, Thailand and other countries.
We produce 2600 ℃ high temperature and pressure laboratory furnace to
the Chinese Academy of Sciences, temperature uniformity to reach ± 6 ℃ /
150mm;
We produce ultra-high-temperature test furnace to Shanghai Jiaotong University, the furnace temperature reached 2850 ℃;
We produce oxidation furnace to China Nuclear Power Institute of
Industrial, in an oxidizing atmosphere, ultra-high temperature box
resistance furnace temperature reached 1850 ℃.
一、
SIGMA Ultra-high temperature definition: in an oxidizing atmosphere
conditions, above 1800 ℃ ultra-high temperature field called field
gentle. Long-term contact measuring temperatures above 1800 ℃
temperature field sensor is called ultra-high temperature sensor.
Long-term use of heating element above 1800 ℃ is called ultra-high
temperature heating element. It is possible above 1800 ℃ long-term use
of the box-type resistance furnace known as ultra-high temperature box
resistance furnace.
二、
Study (high temperature fixed points, HTFPs) is mainly to solve the
ITS-90 temperature scale error in the high temperature section only a
fixed point on the temperature measurement, the temperature scale for
the next generation and provide new fixed at a higher temperature point,
internationally recognized high-temperature fixed point substance CCT
(temperature consultancy Committee) following CCT-WG5 organization
published some metal-carbon eutectic and peritectic carbon, co-C
(nominal temperature of 1324 ℃), Pt- C (nominal temperature of 1738 ℃),
Re-C (nominal temperature of 2474 ℃) and the WC-C (nominal temperature
of 2750 ℃) and so on.
三、
Ultra-high temperature standard temperature and temperature measurement
method: using a standard B-type thermocouple and temperature fixed-point
calibration precision infrared thermometer, the use of B-type
thermocouple and precision infrared thermometer temperature continuity
draw standard temperature and measuring the temperature profile of
furnace chamber, and then measuring the temperature of the gas field in
several temperature points absorption intensity of laser light, thereby
determining the relationship between the gas laser absorption intensity
and temperature, and the curve of the laser gas absorption strength and
temperature as UHT temperature standards. According to the curve to set
the appropriate procedures, to the absorption intensity of the laser is
determined by the temperature level of the gas to be accurate test
ultra-high temperature measurements of other standard equipment.
四、
Concept of ultra-high temperature areas: It is that after establish
standards in the ultra high temperature measurement technology, for
ultra-high temperature performance of ultra-high temperature materials
can be quantitatively tested, ultra-high temperature material dispute in
the application process can determine, the development of ultra-high
temperature materials on a planned basis, research in ultra-high
temperature materials, testing of ultra-high temperature materials,
ultra high temperature measurement, sales of ultra-high temperature
materials and other fields.