In its Functional Chemicals Business, TOHO manufactures and sells high-purity titanium dioxide, ultra-fine nickel powder and other materials which are used in electronics, such as multi-layered ceramic capacitors, PTC thermistors and dielectric resonators.
High-purity titanium dioxide is one of our main products in this business, and our product is characterized by its high purity and high dispersion. It is produced by a gas phase reaction of titanium tetrachloride and oxygen.
Ultra-fine nickel powder, another major product in this business, is manufactured by applying material reduction and powder processing technologies which have been developed by TOHO’s titanium business.
The electronic components made using our products can be seen in the home appliances and electronics we use in our daily life, including televisions, personal computers, refrigerators, air-conditioners, cars and cell phones.
Exploring beyond the cutting edge to promote further advances in electronic materials.
TOHO started the chemicals business with the production of titanium tetrachloride, an intermediate product in the titanium production process. With the addition of new products such as high-purity titanium dioxide and ultra-fine nickel powder to its lineup, TOHO continues to evolve and has positioned itself as a comprehensive manufacturer of raw materials for electronic components, optical parts, and functional materials. As a manufacturer which provides the technology that supports the global shift to digital technology and a more networked society, TOHO has been responding to its customers’ needs and sowing the seeds of cutting-edge technology for the future.
The innovation to meet and create new demand
Produced by using high-purity titanium tetrachloride, an intermediate product in titanium production, and adopting a synthesis technology that keeps the high purity level of the product, TOHO’s high-purity titanium dioxide has established a solid position in the market as an electronic material. And in response to the continuous expansion of the electronic materials market, TOHO has been developing technologies and expanding its product line-up, including the production of ultra-fine nickel powder to satisfy the need for high-function materials. TOHO’s powder manufacturing technology provides a promising foundation to meet the environmental and energy needs of the 21st century. By driving this positive cycle of conceiving new technological seeds to meet new needs, TOHO broadens and deepens its technologies. Raising the quality and performance of its high-function materials, TOHO will keep evolving and take both its customers and itself to the leading edge and beyond.
What is the most important for electronic materials?
We are in an age where electronics are all around us. Not only in telecommunications and broadcasting but also in driving, cooking, education, medical care and leisure, our life is becoming more involved with and dependent on electronics. Although factors like cost and performance are very important for the products in this category, the most important factor is reliability. For example, 1 gram of 0.4 µm particle size nickel powder contains trillions of particles. If only a single non-uniform coarse particle or an impurity finds its way into this material, the electronic parts made from it will not operate normally. That is why TOHO has committed itself to the highest quality standards so that its customers can rely on every particle of TOHO’s powder.
From sub-micron to nano-level technology
Most of TOHO’s electronic materials are supplied in powder form. Throughout the company’s history, we have been developing smaller particle diameters from microns to sub-microns, and now we are advancing into the nano level. The wavelength of visible light is on the order of 400 nm to 800 nm (0.4 µm to 0.8 µm), which is larger than the particle size of our powders. Therefore, a nano-sized particle is invisible to the naked eye. A reduction in particle size by a decimal place results in dramatic changes in the properties of powder, and therein lies the delight that inspires the advance from sub-micron to nano order technologies.
TOHO has been exploring new frontiers of technology and facing new challenges to make breakthroughs that will result not only in materials with superb properties but also in products that possess unique functions and are easy to use.
TOHO’s high-purity titanium dioxide is used in a broad range of products such as multi-layered ceramic capacitors, PTC thermistors (thermally sensitive resistor), dielectric filters, piezoelectric ceramics, and semiconductor capacitors. With constant technological innovations, TOHO has continued to supply high quality products that customers have relied on for over 40 years.
TOHO’s high-purity titanium dioxide boasts an extremely low level of impurities and high chemical stability. It is widely used in pharmaceutical applications such as coatings for pills and as an additive for medicated adhesive patches.
Ultra-thin electrode materials (nickel powder)
TOHO has successfully developed a proprietary technique for the production of a highly pure and crystalline nickel powder to use as an electrode material for multi-layered ceramic capacitors. Taking advantage of its superb dispersion capability, particle size distribution with high precision, TOHO can respond to the challenging demands of customers who wish for extreme thinness in their internal electrodes.
TOHO’s high-purity titanium dioxides are playing a vital role in achieving a high index of refraction for lenses and mirrors. TOHO’s high-purity products are used in a wide variety of optical products; in films via sputtering or deposition processes; and as an additive for glass manufacturing.