Method for liquid phase synthesis of barium titanate nanopowder
A liquid-phase synthesis, barium titanate technology, applied in chemical instruments and methods, titanium compounds, calcium/strontium/barium compounds, etc., can solve problems such as long sintering time, high post-sintering temperature, difficult to control particle size and shape , to achieve the effects of low cost, lower post-sintering temperature, regular shape and controllable post-sintering temperature
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0041] Using n-octane as solvent, Span 80 as active agent, n-hexanol as auxiliary agent and barium acetate solution to form microemulsion, then azeotropic distillation to synthesize nano-barium titanate precursor, and calcining at low temperature 600°C to nano-titanate barium powder. The raw material n-octane 200ml, Span 80 and n-butanol are fully stirred and mixed evenly, the dosage of Span 80 is 20ml, 40ml, 60ml respectively, when the dosage of Span 80 is 40ml, the dosage of n-butanol is 20ml, 40ml respectively . for 1-5. Divide the mixture of n-octane, Span 80 and n-butanol into two parts according to the volume ratio of 3:1 for later use. Then, 20 ml of 1 mol / l barium acetate aqueous solution is added dropwise in a large volume of standby mixed organic solvent to form a microemulsion. Measure 6.8ml of butyl titanate into a small volume of spare mixed organic solvent and stir evenly. Pour the barium acetate microemulsion into the butyl titanate solution, stir well, and ...
Embodiment 2
[0051] Respectively use xylene 200ml, nonane 200ml, n-hexanol 200ml as solvent, form microemulsion with barium acetate solution according to the proportioning of surfactant and auxiliary agent of embodiment 1-5, when using n-hexanol as solvent, do not add auxiliary agent. The dosage and operating steps of other reagents except solvent are the same as in Example 1, but the oil bath temperature is the boiling point of each solvent when the second boiling point is distilled, which are respectively 139°C, 150°C, and 158°C, which are recorded as 2-1, 2- 2, 2-3. The particle size analysis results of the obtained barium titanate powder are shown in Table 2.
[0052] Table 2: Comparison of the specific surface area S and the calculated average particle size d of the powder obtained by forming microemulsions with different types of solvents
Embodiment 3
[0054] According to the reagent consumption provided in embodiment 1-2, use n-octane as solvent, n-hexanol as auxiliary agent, use Tween 60, sodium dodecylsulfonate (SDS), hexadecyltrimethyl bromide respectively Ammonium chloride (CTAB), Triton X-100, etc. indicate that the active agent and barium acetate aqueous solution form a microemulsion, which is recorded as 3-1, 3-2, 3-3, and 3-4. The results of particle size analysis of the finally obtained barium titanate powder are shown in Table 3.
[0055] Table 3: Comparison of specific surface area S and calculated average particle size d of powder obtained from different types of active agents
[0056] sample
[0057] 3-4
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| particle diameter | aaaaa | aaaaa |
| particle diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More