Synthesis method of sodium hexatitanate whisker

Abstract

The invention discloses a preparation method of potassium hexatitanate crystal whiskers, which adopts a technique of melting and quenching for synthesis and has convenient and feasible process flow. First, raw materials containing titanium and gallium are mixed with fluxing agent in a mixer, put into a crucible which is fixed onto a high-temperature furnace and sintered. The high-temperature furnace is leaned in order that the molten mass can flow out equably into special quenching equipment with cold water and water fog at the bottom for quenching. Then, the acid solution dissolves out a part of the sodion and is filtered, washed, soaked by surface active agent and then sintered for recrystallization, thereby obtaining the end product. No agglomeration and aggregation appears in the process of recrystallization. There is no pollution throughout the process. The potassium hexatitanate crystal whiskers produced by the synthetic method of the invention have an average length of 5 to 50um, an average diameter of 0.5 to 3um with a yield higher than 95%, and have the advantages of low thermal conductivity, high infrared reflectivity and low cost.

Description

technical field

[0001] The invention belongs to a method for manufacturing inorganic salt whiskers, in particular to a method for manufacturing sodium hexatitanate whiskers. Background technique

[0002] In the synthesis of sodium hexatitanate whiskers, there are mainly hydrothermal methods, that is, hydrothermal synthesis under high temperature and high pressure. The sintering method can also synthesize sodium hexatitanate whiskers, but the separation is extremely difficult and almost inseparable. The synthesis method of sodium titanate nanotubes has extremely high requirements on raw materials and very harsh conditions, making it difficult to realize industrialization, and the cost is also high, which is difficult for users to accept.

[0003] In the prior art, Chinese patent application No. 200610029749.4 discloses a method for producing sodium hexatitanate whiskers, mixing titanium-containing raw materials, sodium-containing raw materials and flux, putting them into a h...