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Carbide Powder
Description

Zirconium carbide, the melting point of 3540 ℃, the theoretical density of 6.66g / cm3, the thermal expansion coefficient of 6.7 × 10-6 ℃ -1, the microhardness of 2600kg / mm2, the resistivity of 57 ~ 75 / μΩ • cm, began intense oxidation temperature 1100 ~ 1400 ℃. Insoluble in hydrochloric acid, but soluble in nitric acid. The chemical formula of zirconium carbide is ZrC, the atomic weight is 103.22 and the theoretical carbon content is 11.64%. It belongs to a typical NaCl-type face-centered cubic structure with a lattice constant of 0.46930 nm, a space group of Fm3m, a C atom and a Zr atom radius ratio of 0.481 and less than 0.59 , Forming a simple gap phase, Zr atoms form a close cubic lattice, C atoms in the lattice octahedral interstitial position.

 

 

Zirconium carbide has high surface activity, high temperature resistance, oxidation resistance, high hardness, good thermal conductivity, good toughness and other characteristics, is an important high-melting point, high strength and corrosion-resistant high temperature structural materials, and has high efficiency absorption of visible light, reflection Infrared and energy storage and other characteristics. Ultra-high purity zirconium dioxide and high purity carbon black as raw materials, the company's original application of additive formulation core technology, alloying sintering technology to ensure the purity of zirconium carbide powder, low oxygen content, low free carbon, the powder grain Densification, the phase composition of stability, carbonization sintering uniform, uniform size, quality and stability.

 

 

 

 

 

Changsha Langfeng Metallic Material Co.,Ltd.

 

 

GRADE

 

 

CHEMICAL COMPOSITION(max,%)

 

Total carbon

Free carbon

Impurities(max,%)

 
 

Nb

Fe

Si

O

N

Na

K

Ca

 

LF-ZrC

≥11.2

≤0.50

0.005

0.05

0.005

0.50

0.05

0.005

0.005

0.05

 

Particle size:0.5-500micron,5-400mesh;Particle size and chemical composition are modified on request.

 

 

Zirconium carbide as an additive, the company part of our customers will be produced by the company by a certain percentage of zirconium carbide added to the rubber, plastic, polyethylene, acrylonitrile - butadiene - styrene copolymer ABS plastic, transparent plastics, resins, Polyurethane materials and other materials, manufactured into related products, can greatly improve the strength of plastic and related materials products, high temperature performance and drop resistance.

 

 

 

Zirconium carbide in a certain ratio and C / C composites, can significantly improve the ablation resistance of composite materials; Zirconia produced composite materials can improve the heat resistance grade, zirconium carbide in a certain ratio to Zr- Ti alloy, C / C- (Zr-Ti-CB / SiC) composite and Zr-Ti-CB ceramic can be made into ceramic coating and composites resistant to 3000 ℃ ablation, Ablation performance and thermal shock resistance, is a new type of hypersonic vehicle key components of the material, is now widely used in military, aerospace field.

 

 

 

 

 

 

As a zirconium carbide with endothermic, heat storage characteristics, is used for rocket motor solid propellant in a raw material; is also the production of zirconium and zirconium tetrachloride raw materials; can also be used as abrasive, carbide raw materials.

 

 

Zirconium carbide for U-shaped ZrC-graphite composite ceramic composite heater, heating efficiency, energy-saving effect, small footprint, low-temperature cold junction, electrical properties and stability; under vacuum, neutral or reducing atmosphere conditions, Provide high temperature above 2000 ℃ environment; Has good thermal shock resistance, high thermal efficiency, heating speed, 120 minutes from room temperature to 2000 ℃; Can be used for ultra-high temperature refractory thermal shock test.

 

 

 

 

Zirconium carbide for zirconium carbide composite ceramic sensor, high mechanical strength, not easily deformed at high temperatures and volatile, stable electrical properties, long service life. Under vacuum or protective atmosphere, the ultra-high temperature ambient temperature below 3000 ° C can be accurately measured, which is a temperature sensing component with the highest temperature measurable in a contact sensor.

 

 

Case: A method for preparing a zirconium carbide composite ceramic temperature sensor, comprising the following steps:

 

Mixing the zirconium carbide powder with a certain amount of additives, adding the solvent into a ball mill for ball milling, controlling the running speed of the ball mill to be 150 to 250 revolutions per minute and milling time to be 20 to 40 hours, obtaining the mixture after ball milling,

 

 

 

The mixture is placed in a rotary evaporator and dried to control the water bath temperature of 65 ~ 85 ℃, rotating bottle speed of 20 ~ 70 rev / min, drying time is 2 ~ 5 hours, after drying 50 ~ 200 mesh sieve , Get presintered mixed powder;

 

 

 

The pre-sintered mixed powder into the mold, in a vacuum or inert atmosphere sintering temperature control 1900 ~ 2600 ℃, the pressure is 30 ~ 60MPa, hot pressing sintering;

 

 

 

 

The sintered monolithic ceramic wires are cut into the required size and shape of the sensor.

 

 

 

As a new carbide conductive ceramic, ZrC has high melting point, high hardness, good oxidation resistance, high thermal stability and equivalent conductivity with metal. It is insoluble in normal hydrochloric acid and sulfuric acid and has good chemical stability. As well as good electrical and electrochemical properties, in full compliance with the conditions of the application of conductive materials, can be used as a conductive material in new fuel cells, electrolytic cells and other environments, and has good application prospects in the industrial field.

 

 

 

irconium carbide used in silicon carbide / zirconium carbide composite ceramics and zirconium carbide hot cathode material.

 

 

Zirconium carbide hot cathode material and its preparation method belongs to the technical field of refractory metal cathode material. Pure zirconium carbide cathode thermal emission characteristics. Preparation methods include the following aspects, the use of high-energy ball mill grinding zirconium carbide powder, 200 mesh sieve. The powder into the abrasive, the use of spark plasma sintering technology sintering. The use of wire cutting, turning, metallographic polishing method to get the required size and bright surface of pure zirconium carbide cathode. The hot cathode material is characterized by a simple preparation process, good heat-emitting performance, good anti-exposure to the atmosphere.

 

Zirconium carbide used in the manufacture of zirconium carbide ceramic nozzle, characterized by the following raw materials in parts by weight: polycrystalline silicon waste 4-7, coal gangue 1-2, pebbles 6-12, moire 2.7-3.4, attapulgite 2-4, aluminum nitride 80-85, boric acid 0.1-0.2, glycerol 2.8-4.5, starch ether 0.2-0.5, dioctyl phthalate 7-9, nylon powder 1.3-1.7, zirconium carbide 35-45, 3-4, suitable amount of water; The preparation method improves the existing ceramic nozzle production process and formula, add polycrystalline silicon waste, coal gangue, pebbles, nano-

 

zirconium carbide, ceramic nozzle with high strength, good ductility advantage.

 

 

 

 

Zirconium carbide used in zirconium carbide induction thermal insulation polyester fiber.

 

 

 

Zirconia induction thermal insulation polyester fiber and its preparation method: using zirconium carbide as additive, on-line adding mass fraction of 1.0-8.0% of zirconium carbide and polyester chips are uniformly blended and melted in a screw, Silk plate micro-hole extrusion, the cooling and solidification forming and oil nozzle oil bunching process, winding speed of 3000m / min ~ 3200m / min winding made of POY tube, after the balance, and then tensile deformation, the system was Nano-zirconia induction thermal insulation polyester fiber, with efficient and selective absorption of solar radiation in the visible and near-infrared, and can reflect the human body thermal radiation and bi-directional temperature sensing regulation and insulation features to change the warm clothing protective clothing Way, with high added value, good quality, cost-effective obvious advantages. The breaking strength of the fibers is 3.45 cN / dtex to 3.68 cN / dex and the elongation at break is 20% to 30%.

 

Zirconium carbide used in the new insulation thermostat textiles, Zirconium carbide with high efficiency to absorb visible light, reflecting the characteristics of infrared, when it accounts for 95% of sunlight in the short wavelength of 2μm below the energy through heat conversion, energy can be stored in It also has the property of reflecting infrared wavelengths in excess of 2 μm. The human body produces infrared wavelengths of about 10μm, when people wear a Nano - ZrC textile clothing, the human body will not be easily distributed infrared infrared. This shows that zirconium carbide has an ideal endothermic, heat storage characteristics. Products can be applied to the new insulation thermostat textiles.

 

 

 

Zirconium carbide used in nylon, the use of zirconium carbide compound particles added to nylon and polyester fibers, making it efficient absorption of solar energy and converted into a heat of the fabric, that is far infrared insulation fabrics. Improve the insulation, the clothing in a cold environment is very meaningful. The exothermic So1ar & Micro Type co-produced by Japan's Unicheka and Descente is made by adding zirconium carbide (ZrC) to nylon yarns, which are used to make sportswear, Fifteen darts and 32 dtex 32 silk garments were selected by the national teams of Spain, Australia and Canada at the 1998 Winter Olympics in Nagano.

 

 

 

 

The application of zirconium carbide to the fiber, different zirconium carbide and silicon carbide powder content and the way of adding have an impact on the near infrared absorption of the fiber. When the content of the zirconium carbide or silicon carbide in the fiber reaches 4% by weight, the near-infrared absorption property of the fiber Optimally, the addition of zirconium carbide and silicon carbide to the sheath of the fiber gives a better near-infrared absorption than the effect added to the core. The effects of the preparation process of phase change material microcapsules and nanocapsules on the structure and properties of the capsules were studied. The undercooling of microcapsules was reduced by the addition of supercooling agent. The phase change material microcapsule melt spinning and solution spinning process were used to prepare the heat storage temperature control fiber. The structure and properties of the fiber were studied. Capsule fibers, these fibers have a significant heat absorption and storage capabilities, processing of textiles with temperature regulation.

 

 

 

Uniqe Fiber's "Thermotron" incorporates zirconium carbide particles into the core of the yarn to convert sunlight (visible light) into heat energy while reflecting far-infrared rays from the body to keep warm. Zhongrao Synthetic Fiber Co., Ltd. thermal storage thermal insulation polyester material "Ceramino" is the far infrared absorbing material evenly penetrate the molecular structure of the fiber, thereby increasing the absorption of sunlight and other external infrared. At the same time, the human body to absorb the infrared and converted into heat, to play its thermal insulation effect. In addition, through the dyeing process of special treatment, eliminate the hard touch. Fuji Spinning company's "INSERARED" is added to the radio-frequency infrared ceramic composition of polyester fiber and cotton blend material. Not only for underwear, but also for bedding and so on. Cola Company also introduced many far-infrared related products. "LONWAVE" is through the addition of ceramic components to improve the insulation properties.

 

 

 

 

The fabric absorbs the sun's energy, converts it into heat, and stores it in the fabric for warmth. The product has been developed by Unitika as "Solor-a" and is added to the part of the conjugate polyester core Zirconium carbide, the fabric has a warm effect. 

 

 

 

Sunshine thermal insulation finishing

 

 

The distribution of body heat, radiation to the most, so try to reduce the distribution of insulation is the best. For example, the incorporation of aluminum metal particles in the coating resin can enhance the reflection of radiation and provide a better thermal insulation effect. The addition of ceramic particles or carbon particles to the coating resin also enhances the reflection, preventing the radiation (such as UV rays) from being incident on the outside, thereby preventing the heat energy from radiating out and enhancing the heat preservation effect. Some ceramic particles can also absorb the heat emitted by the human body, and then emit far infrared, so that insulation is further strengthened. However, this performance can not fully meet the light and warm winter sportswear requirements, is still a negative insulation fabric. Active Insulation Fabric There are electrothermal fabrics that use batteries and film-shaped heating elements to convert electric energy into thermal energy, chemical reaction heating fabrics that use materials such as iron powder to be oxidized by the oxygen in the air and generate heat, but they have problems such as inconvenience of carrying and durability .

The use of solar collectors, the selective absorption of solar energy, and then gradually released, you can permanently use solar energy to heat. Materials that selectively absorb solar energy include zirconium carbide (ZrC). In fact, it has been found that the carbides of Group IV transition metals of the periodic table all have the property of absorbing and converting high-energy radiation of 0.6 eV or more into heat energy when irradiated with light and radiation having an energy of less than 0.6 eV Reflections are not absorbed. Most of the Sun's electromagnetic radiation can be absorbed by them and converted into heat.

ZrC powder irradiated by 1000nm radiation temperature will be significantly increased, indicating that it has a good heat storage effect. Such as the ZrC mixed fibers, the development of absorbable solar radiation in the visible and near infrared, and can reflect the body heat radiation so-called thermal insulation so-called thermal insulation fabric, suitable for winter sportswear, men and women fabric, and swimwear, etc.

 

Tai Chi stealth lungs using aerospace materials thermal technology zirconium carbide can automatically generate heat, bursts of heat flow to clear the meridians, two-way double effect on the back of heart Yu, Feishu, Dingchuan chest and chest, milk roots and other acupuncture points, Like the acupuncture points "steamed" open, so that acupuncture points to expand 5 times, thus opening up a direct tunnel in the human body. 3000 Gaussian magneto-optical shock point acupuncture pulse 8000 Pulmonary medicine vapor steamed lungs Tai Chi stealth lung chest and back corresponding to two Taoist secret medicine bag 30000 super magnetstone, the sustainable release of 3000 Gauss magneto-optical wave, the corresponding phase Suction through the body to promote the gas through the acupuncture points into the lesion to the frequency of 8000 pulses per minute washing the lungs and heart parts, to promote the discharge of toxins trash in order to achieve a thorough and effective treatment of cough and heart disease.

 

 

 

Zirconium carbide powder filled in carbon fiber, carbon fiber products greatly improve the wear resistance and strength, has been successfully applied to the China Aerospace Science and Technology Corporation IV Institute forty-third Institute of carbon fiber products for the defense industry to make Contribution! Both nano-zirconium carbide is a new type of carbon-carbon composite materials modifiers and additives.

 

 

 

 

Zirconium carbide cermet powders are useful as electrodes, refractory crucibles, and cathode electron-emitting materials. Zirconium carbide cermets have excellent properties that make them useful in many fields. Because of its high hardness, zirconium carbide cermet can be used as abrasive, for a variety of hard metal, corundum or glass processing; can also be made of wear-resistant, corrosion-resistant zirconium carbide crucibles and knives, nano-zirconium carbide can also be used as nano Cemented carbide and aerospace and other high-end products; In addition, it can be used in the nuclear fuel industry, electronic equipment, tool wear protection film, super-hard film material and high-brightness electron emission film. Zirconium carbide coatings with different properties can be obtained by choosing different process conditions. Low-density loose zirconium carbide coatings have good thermal stress and insulation properties and can be used as insulating materials. The high-density dense zirconium carbide coating has good anti-permeability, Can be used as protective coating.

 

 

 

 

Zirconium carbide powder in anti-infrared reconnaissance applications:

 

 

Zirconium carbide powder absorbs not only high-energy rays with a wavelength of less than 2 μm but also low-energy rays with a wavelength of more than 2 μm. The human body emits heat at a wavelength of about 10 μm, so the human body is wearing fiber garments that are added with the zirconium carbide powder, which can effectively prevent heat radiation from the human body so as to avoid being discovered by the infrared reconnaissance equipment and has been successfully applied to the military field.

 

Zirconium carbide with many compounds (such as HfC, TaC, NbC, etc.) to form a solid solution. The solid solution of 4 molecules of tantalum carbide and 1 molecule of zirconium carbide has a very high melting point and is a good thermionic emitter. The solid solution of 6 molecules of niobium carbide and 4 molecules of zirconium carbide has an extremely high melting point and is a good carbide cutting tool material that can replace expensive tantalum carbide. The Zr-Ti alloy, Zr-Ti-C-B ceramic material and C / C- (Zr-Ti-C-B / SiC) composite produced by Zirconium carbide are new materials that can resist ablation at 3000 ℃

 

 

 

 

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