Titanium dioxide has been widely used in industry.

Because of its high gas application sensitivity.

Dielectric and chemical and photocatalytic properties.

1-3 crystalline titanium dioxide exists in different

Forming, for example, brookite. Rutile and anatase.

Brookite and anatase are thermodynamically metastable.

Exothermic, so it can be transformed in an irreversible way.

At a higher temperature. Rutile transition temperature

The range of literature reports is from 450 to 1200 people.

C.5-8

Nanomaterials have attracted extensive attention.

Because of their unique and constantly improving machines,

Compared with electrical, optical and chemical properties

Compared with traditional polycrystalline materials. various

Synthetic methods, such as hydrolysis, sol-gel method and microemulsion method 7-9 10.

(or reverse glue), No.5-6, hydrothermal synthesis method and Chengdu University have been used to prepare nanoparticles.

Titania's. Compared with other methods, hydrothermal method

Synthesis can be carried out at a relatively low level.

Reaction temperature (

Commerciality of crystals and necessity of post-calcination.

Preparation of ultrafine titanium dioxide by 17 and 18 hydrothermal methods.

Powder has published several works 1 1- 14.

Changes of modern submarine hydrothermal reaction conditions, such as

Reaction temperature, ph value of reactant concentration,

And the mixture is converted into crystals.

Have different components, structure,

The form. 1 1- 14 is generated, 17, 18 However,

Increase the reaction temperature and/or reaction time

Does it usually lead to the formation of this theory?

This is the great interest of fans 18, 19 years old to limit crystal growth.

Hydrothermal aging to obtain monodisperse polymer.

Using controllable technical powder, for example

Use microreactors.