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Comparison of ni-cr and tantalum nitride film resistors in communication applications

Prior to the widespread acceptance of surface mounted sheet resistors in the 1980s and 1990s, metallized hole mounted molded resistance was usually used in precision applications. Through hole mounted discrete resistors have always been made by depositing thin film resistive materials on cylindrical ceramics. The leads are connected to both ends of the ceramic and the columnar resistance devices are molded or coated to produce a fully sealed product as shown in figure 1. The sheet resistance shown in [...]

Characteristics and application of barium titanate ceramics

Barium titanate ceramics are ceramic materials with barium titanate (BaTiO3) or its solid solution as the main crystal phase. The main raw materials are barium carbonate and titanium dioxide. Generally, barium titanate is synthesized at 1200℃ first, and then modified oxide is added. After fine grinding, it is sintered at 1400℃ or so. Used as dielectric material of capacitor and make many kinds of piezoelectric devices Barium titanate ceramics are ceramics with barium titanate or its solid solution as the [...]

Research on nano aluminum nitride in thermal conductive plastics

1. Heat-conducting silica gel and epoxy resin: Ultra-high thermal conductivity nano-aln composite silica gel has good thermal conductivity, good electrical insulation, wide electrical insulation service temperature (working temperature -60℃- 200℃), lower consistency and good construction performance. Products have reached or exceeded imported products, because can replace similar imported products and widely used in electronic devices heat transfer medium, improve work efficiency. Such as CPU and radiator gap, high-power audion, thyristor element, diode, and the substrate contact with the thin seam [...]

Thermal and optical properties of nanometer tin oxide

In terms of thermal properties, nano SnO2 can be attributed to an ATO raw material, and its heat insulation mechanism: The SnO2 crystal has a regular tetrahedral rutile structure, and the anion coordination number is 6∶3. Each tin ion is adjacent to 6 oxygen ions, and each oxygen ion is adjacent to 3 tin ions. After antimony doped ions in SnO2, occupy the position of the lattice Sn4 +, forming a positive charge one price center SbSn and an extra [...]

Types and applications of zirconium oxide materials

Zirconium oxide is a kind of high temperature resistance, corrosion resistance, wear resistance and good electrical conductivity of inorganic non-metallic materials, that should be used for refractory material field in the early 1920 s, until the mid – 1970 – s, Europe and the United States, the advanced countries in the world have had the same person research and development of zirconium oxide production technology and zirconium oxide series products production, further to expand application field of zirconium oxide [...]

Select bismuth titanate specific work introduction

Bil2Ti020 material was prepared by solution hydrothermal method. Crystals with graded structure such as micron ball, micron flower, nanorod and nanowire were synthesized. For controllable morphology, this paper analyzes the reaction temperature, reaction time, pH and PVA concentration on Bil2Ti020 morphology and structure, the influence of the reaction parameters of the material controllable morphology, proposed the nanoparticles a micron spend a growth mechanism of nanowires – micro ball and focuses on the material of optical and light catalytic properties. [...]

Application of conductive potassium titanate whiskers

With the continuous improvement and development of technology, the conductive properties of insulating matrix composites have become more and more popular. The development of high performance conductive reinforced fiber material manufacturers have been very important. In order to meet this demand, potassium titanate whiskers with high conductivity can be prepared by reduction method and coating conductive layer method on the basis of potassium titanate whiskers. The conductive whisker can not only keep the original good physical and chemical properties of [...]

The first and second generation of lithium titanate

Lithium titanate: the ill-fated first generation of quick-charge batteries Under this background, micromacro enters the “quick charging stage”. “” in 2010, we launched the LpTO lithium titanate battery, officially launched the quick charge technology route and applied in chongqing bus.” ” “For the fixed line between A and B, the quick charge operation mode is to set charging station at point A or A and B simultaneously. The battery capacity of the vehicle does not need to be large, and [...]

Vanadium dioxide – a revolutionary material for future electronics industry

Geneva, Feb. 15 (xinhua) — vanadium dioxide is an ideal choice to replace silicon for a new generation of low-power electronic devices due to its unique properties. Swiss researchers have demonstrated the potential of using vanadium dioxide in aerospace communications (600677) systems to enable programmable radio frequency electronics. Vanadium dioxide has phase change characteristics, and its shape can be changed between insulator and metal. It is an insulator at room temperature and a metal conductor above 68 degrees Celsius. This [...]