Titanium dioxide is an important white pigment and porcelain glaze

Overview of titanium oxide TiO2 powder

Titanium oxide TiO2 powder, also called titanium dioxide, is an important inorganic chemical pigment, mainly composed of titanium dioxide. The production process of titanium dioxide has two process routes: sulfuric acid method and chloride method. It is widely used in coatings, printing inks, papermaking, plastics and rubber, chemical fiber, ceramics, and other industries.

Titanium dioxide is an inorganic substance with a chemical formula of TiO2. It is a white solid or powdered amphoteric oxide with a molecular weight of 79.9. It has non-toxic, best opacity, best whiteness, and brightness, and is considered the best performance in the world today. Of a white pigment. Titanium white has strong adhesion, is not easy to undergo chemical changes, and is always white. It is widely used in coatings, plastics, papermaking, printing inks, chemical fiber, rubber, cosmetics, and other industries. It has a high melting point and is also used to make refractory glass, glaze, enamel, clay, high-temperature resistant laboratory utensils, etc.

At the same time, titanium dioxide has a good UV shielding effect and is often used as a sunscreen agent to be incorporated into textile fibers. Ultrafine titanium dioxide powder is also added to sunscreen cream to make sunscreen cosmetics.

Titanium dioxide can be extracted by acid decomposition of rutile or obtained by decomposition of titanium tetrachloride. Titanium dioxide has stable properties and is used in large quantities as a white pigment in paint. It has good hiding power and is similar to lead white, but it does not turn black like lead white; it has the same durability as zinc white. Titanium dioxide is also used as a matting agent for enamel, which can produce a very bright, hard, and acid-resistant enamel glaze.

Among the commonly used white pigments, the relative density of titanium dioxide is the smallest, and among white pigments of the same quality, titanium dioxide has the largest surface area and the largest pigment volume. Titanium dioxide has very stable chemical properties and is an acidic amphoteric oxide. At room temperature, it hardly reacts with other elements and compounds. It is ineffective against oxygen, ammonia, nitrogen, hydrogen sulfide, carbon dioxide, and sulfur dioxide. It is insoluble in water, fat, dilute acid, and inorganic acid, alkali, and only soluble in hydrofluoric acid. . But under the action of light, titanium dioxide can undergo continuous REDOX reaction and has photochemical activity. Under the action of ultraviolet anatase titanium dioxide, this photochemical activity is particularly obvious.

Titanium dioxide is generally divided into anatase type (Anatase, abbreviated as type A) and rutile type (Rutile, abbreviated as R type). The rutile crystal structure is compact, relatively stable, and has low optical activity, so it has good weather resistance, high hiding power, and color extinction. Titanium dioxide has semiconductor properties, its conductivity increases rapidly with temperature, and it is also very sensitive to hypoxia. The dielectric constant and semiconductor properties of rutile TiO2 are very important to the electronics industry and can be used to produce electronic components, such as ceramic capacitors.

According to the Mos hardness level of 10 points, rutile TiO2 is 6 to 6.5, and anatase TiO2 is 5.5 to 6.0. Therefore, in chemical fiber matting, anatase is used to avoid abrasion of the spinneret holes. Although titanium dioxide is hydrophilic, its hygroscopicity is not too strong, and the rutile type is smaller than the anatase type. The hygroscopicity of titanium dioxide has a certain relationship with its surface area, large surface area, and high hygroscopicity, but it is also related to surface treatment and performance.

The performance of titanium oxide TiO2 powder

Titanium dioxide, also known as titanium dioxide or titanium dioxide, is a natural oxide of titanium with the chemical formula TiO2.

Titanium dioxide is a white inorganic compound that has been used in various products for about 100 years.

Titanium dioxide is non-toxic, non-reactive and luminous, and can safely improve the whiteness and brightness of many materials.

It is the whitest and brightest among known pigments and is reflective. It can also scatter and absorb ultraviolet rays.

How is titanium oxide TiO2 powder produced?

Titanium dioxide is manufactured in two different ways: the sulfate method and the chloride method.

1. Sulfate method titanium sulfate is an acid hydrolysis method through iron titanium powder and concentrated sulfuric acid

produced. The concentrated sulfuric acid is decomposed into acetylene acid, and then calcined and crushed to obtain a titanium dioxide product. This method can produce anatase and rutile titanium dioxide. The sulfuric acid method is cheap, easy to use ilmenite and sulfuric acid as raw materials, the process is relatively mature, the equipment is simple, and it is easy to solve the problem of anti-corrosion materials. Its disadvantage is that the process is long, which can only be based on intermittent operation, wet operation, high consumption of sulfuric acid, water, waste and by-products, and large environmental pollution.

2. Chloride method

The chlorination method uses titanium-containing raw materials, high-chlorinated titanium slag, or artificial rutile, or natural rutile reacts with chlorine to generate titanium tetrachloride, which is distilled, and then gas-phase oxidation is performed. After rapid cooling, TiO2 is obtained by gas-solid separation. The adsorption of TiO2 due to a certain amount of chlorine requires heating or steam treatment to remove it. The process is simple, but there are many chemical engineering problems under chlorination conditions of 1000℃ or higher, such as chlorine, chlorine oxide, titanium tetrachloride, high corrosion problems that need to be solved, plus the special raw materials used, and sulfuric acid Compared to the method cost. Chlorination production is continuous production, and the operational flexibility of production equipment is not great, but its continuous process production has a simple process and few process control points, and the product quality is easy to achieve optimal control. The advantages of the chlorination method are that the process is short, the production capacity is easy to expand, the continuous automation is high, the energy consumption is relatively low, and high-quality products can be obtained. Its disadvantages are a large investment, complex equipment structure, high material requirements, high-temperature resistance, corrosion resistance, difficulty in equipment maintenance, and difficulty in research and development. Relatively low energy consumption, high-quality products can be obtained. Its disadvantages are a large investment, complex equipment structure, high material requirements, high-temperature resistance, corrosion resistance, difficulty in equipment maintenance, and difficulty in research and development. Relatively low energy consumption, high-quality products can be obtained. Its disadvantages are a large investment, complex equipment structure, high material requirements, high-temperature resistance, corrosion resistance, difficulty in equipment maintenance, and difficulty in research and development.

Application of Titanium Oxide TiO2 Powder

Industrial application

Titanium dioxide is an important white pigment and porcelain glaze. Used in paint, ink, plastic, rubber, paper, chemical fiber, watercolor paint, and other industries.

Titanium dioxide is the whitest thing in the world. 1 gram of titanium dioxide can paint an area of more than 450 square centimeters white. It is 5 times whiter than the commonly used white pigment-Lithopone, so it is the best pigment for white paint. Titanium dioxide used as a pigment in the world can reach hundreds of thousands of tons a year. Titanium dioxide can be added to paper to make the paperwhite and opaque. The effect is 10 times greater than other substances. Therefore, it is necessary to add titanium dioxide to banknote paper and art paper.

In order to lighten the color of plastic and soften the luster of rayon, titanium dioxide is sometimes added.

In the rubber industry, titanium dioxide is also used as a filler for white rubber.

The photochemical properties of semiconductor titanium dioxide have made it useful in many fields, such as the purification of air, water, and fluids. Photocatalysts doped with carbon or other heteroatoms can also be used in sealed spaces or areas with scattering light sources. When used in coatings on buildings, pedestrian slabs, concrete walls, or roof tiles, they can significantly increase the decomposition of air pollutants such as nitrogen oxides, aromatics, and aldehydes.

In addition, it is widely used in the production of sunscreen, which is non-toxic and harmless to the human body.

Ultrafine titanium dioxide has excellent UV light shielding and transparency. It is widely used in cosmetics, wood protection, food packaging plastics, durable household films, man-made fibers and natural fibers, and transparent coatings. The special optical effect in metallic flash coating makes it pay attention to and applied in high-end car paint.

Food application

The US Food and Drug Administration stipulates that titanium dioxide can be used as all food white pigments, and the maximum use amount is 1g/kg Sec. 73.575 titanium dioxide. The pigment additive titanium dioxide can be safely used in general colored foods, subject to the following regulations:

(1) The amount of titanium dioxide does not exceed 1% of the weight of the food.

(2) Colored foods that cannot be used in accordance with the special standards published in Article 401 of the Act, unless there is a similar standard that allows the addition of coloring.

(3) For colored foods, the edible color additive titanium dioxide can contain an appropriate diluent, as a safe color additive, as follows: silicon dioxide, as a dispersing aid, the content does not exceed 2%.

Product adaptation: preserved fruits, jelly, fried food, cocoa products, chocolate, chocolate products, hard candies, polished candies, gum-based candies, puffed foods, candies, and chocolate products coating, mayonnaise, salad dressing, jam, solids Drinks, konjac gel foods, etc.

Environmental protection

Purifying air

Titanium dioxide, as a catalyst for light coating pigments, is not only an environmentally safe cleaning agent but also can save energy and protect environmental resources.

Early Japanese and British scientists applied titanium dioxide to the surface of paving stones on urban roads to clean the road air. Titanium dioxide can be mixed with asphalt to reduce pollutants in the air. When cars pass by, concrete or asphalt containing titanium dioxide can purify the air and eliminate 25% to 45% of nitrogen oxides in vehicle emissions. Coating titanium dioxide on the concrete surface has the same effect as cleaning the air.

Cool the earth

In May 2012, British scientists put forward a bold idea. They believed that by spraying enough titanium dioxide into the stratosphere to reflect sunlight, the purpose of cooling the earth can be achieved. This can effectively offset the various effects caused by global warming. An unfavorable climate factor.

Because titanium dioxide can effectively reflect direct sunlight, and its properties are stable, it has a good covering ability, if it is sprayed in the stratosphere, it can play a long-term role. British scientists have proposed that high-altitude balloons can be used to bring this chemical substance into the stratosphere and then release it. Once titanium dioxide is evenly distributed in the earth's stratosphere, it can effectively reflect sunlight and cool the earth.

Peter Davidson, the president of the British consulting company Davidson Technology and a chemical engineering scientist, is the person in charge of this project. He introduced that only 3 million tons of titanium dioxide need to be transported to the stratosphere of the earth to form a layer of thickness stratosphere of the earth. A 1mm protective layer and the effect it can play is huge enough to offset the greenhouse effect caused by twice the current carbon dioxide content in the atmosphere.

Sunscreen cosmetics

Because ultraviolet rays are very harmful to the human body, developed countries have paid more attention to the research and development of sunscreen products in recent years, and have successively introduced a variety of anti-ultraviolet fibers, plastics, films, coatings, as well as sunscreen creams, foundations, and lipsticks. Sunscreen cosmetics such as mousse, and ointment. In recent years, my country has also increased the research and production of sunscreen cosmetics.

However, in the past, sunscreens were mostly organic compounds such as benzophenones, anthraquinones, salicylates, para-aminobenzoic acid, cinnamate, etc., so they were unstable, short-lived, and had greater side effects. , Has a certain degree of toxicity and irritation. If it is added in excess, it will cause chemical allergies and may even cause skin cancer. Nano-titanium dioxide is an inorganic component, which has excellent chemical stability, thermal stability and non-migration, strong decoloring power, hiding power, low corrosiveness, good dispersibility, and non-toxic, odorless, It is non-irritating, safe to use, and has the function of sterilization and deodorization. More importantly, as mentioned above, nano-titanium dioxide can not only absorb ultraviolet rays but also emit and scatter ultraviolet rays, so it has the strong anti-ultraviolet ability. Compared with the same dose of organic anti-ultraviolet agent, its absorption peak in the ultraviolet region Higher; and nano-titanium dioxide has a blocking effect on ultraviolet rays in the mid-wave and long-wave regions, unlike organic anti-ultraviolet agents, which only shield ultraviolet rays in the mid-wave or long-wave region. Especially due to its finer particles, high transparency of the finished product, visible light transmission, natural skin whiteness when added to cosmetics, overcoming the opacity of some organic matter or pigment-grade titanium dioxide, making the skin unnaturally pale. Because of this, nano-titanium dioxide quickly received widespread attention and gradually replaced some organic anti-ultraviolet agents, becoming a physical shielding anti-ultraviolet agent with superior performance in today's sunscreen cosmetics.

With the improvement of people's living standards and the intensification of international competition, the research and development of safe and efficient sunscreen cosmetics will gradually increase. Nowadays, the sunscreen cosmetics market in developed countries has shown strong vitality. From 1999 to 2000, the annual sales in the United States reached 737 million and 765 million U.S. dollars, and the United Kingdom reached 245 and 270 million U.S. dollars. In recent years, they have increased by more than 20% and 10% respectively. Among them, the consumption of nano-titanium dioxide is also increasing year by year. Increase in magnitude. The annual demand of nano-titanium dioxide in Japan's anti-ultraviolet cosmetics is more than 1000t, and the amount in textiles, plastics, and rubber products is even greater.

From the development trend of sunscreen cosmetics, one is inorganic sunscreens instead of organic sunscreens, and the other is bionic sunscreens. The latter has a relatively high cost and is difficult to promote now. The former is generally optimistic because of its moderate price and superior sun protection performance. Especially nano-titanium dioxide, due to its superior performance and application prospects, its development momentum and market potential are better.

The price of titanium oxide TiO2 powder

The price of titanium oxide TiO2 powder will vary randomly with the production cost, transportation cost, international situation, exchange rate and market supply and demand of titanium oxide TiO2 powder. Tanki New Materials Co.,Ltd aims to help all industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for titanium oxide TiO2 powder, please feel free to send to get the latest titanium oxide TiO2 powder price.

Supplier of Titanium Oxide TiO2 Powder

As a global supplier of titanium oxide TiO2 powder, Tanki New Materials Co.,Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced technology and engineering materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.