Material and method for preparing strontium titanate and barium titanate electronic function ceramic using laser

Abstract

The invention discloses a material for making electrically-functional strontium barium niobate ceramic by laser and a method thereof. The material consists of barium carbonate, strontium carbonate and titanium dioxide which are compounded according to a molar ratio of (1-x) to x to 1, wherein the x represents a molar mass fraction, and the x is more than 0 or less than 1; the used material is subject to mixture, ball milling, plasticization, granulation, green compaction and evacuation and sintering by CO2 laser, so as to be made into the electrically-functional strontium barium niobate ceramic. The material is low in cost, the laser sintering method consumes less energy, the sintering time is short, and the electrically-functional strontium barium niobate ceramic made by the laser sintering has the advantages of little crystal grain, small porosity, high tightness, high reliability, safety, electricity conservation, etc. In addition, strontium barium niobate is a sosoloid totally combining the barium carbonate and the strontium carbonate, the continuous solid solubility of the strontium barium niobate makes dielectric and optical performances of the ceramic adjusted continuously under the condition that the quantity relative ration between Ba and Sr is in a range of between 0 and 1; meanwhile, the electrically-functional ceramic with a big dielectric coefficient and less dielectric loss can be obtained through adjusting the ration between the Ba and the Sr.

Description

Technical field: [0001] The invention relates to a material and a method for preparing strontium barium titanate electronic functional ceramics by laser, and belongs to the technical field of electronic functional ceramics preparation. Background technique: [0002] Barium strontium titanate is BaTiO 3 and SrTiO 3 Complete solid solution, its continuous solid solution can make the dielectric and optical properties of the material continuously adjusted in the range of Ba / Sr ratio, which is of great significance in the application field of electronic components. At present, the preparation methods of electronic functional ceramics mainly include solid-phase sintering method and liquid-phase synthesis method, but these two preparation methods have their own shortcomings: the solid-phase sintering method is difficult to achieve molecular-level mixing, low material activity, and energy consumption. Large, easy to introduce impurities, poor purity and uniformity, long sintering ...

AI Technical Summary

Problems solved by technology

At present, the preparation methods of electronic functional ceramics mainly include solid-phase sintering method and liquid-phase synthesis method, but these two preparation methods have their own shortcomings: the solid-phase sintering method is difficult to achieve molecular-level mixing, low material activity, and energy consumption. Large, easy to introduce impurities, poor purity and uniformity, long sintering time, difficult to control the reaction, low yield of ceramic components, poor pressure resistance, large ceramic grains, pores and other defects; liquid phase sintering The process of this method is long, it is easy to cause environmental pollution, the powder is easy to agglomerate, the price of raw materials is expensive, and it requires high temperature and high pressure, and the investment in equipment is large, which also limits the application of this method.

In recent years, some people have begun to apply laser technology to the preparation of electronic functional ceramics. However, at present, narrow-band lasers are mainly used in China to prepare electronic functional ceramics. The disadvantage is that the sintering width is narrow, only 1-3mm. The temperature gradient is large, and it is easy to crack, which makes it difficult to sinter the green compact into rows.