CN1028860C - Micro powder making process of bismuth trioxide - Google Patents
Micro powder making process of bismuth trioxide Download PDFInfo
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- CN1028860C CN1028860C CN 92107155 CN92107155A CN1028860C CN 1028860 C CN1028860 C CN 1028860C CN 92107155 CN92107155 CN 92107155 CN 92107155 A CN92107155 A CN 92107155A CN 1028860 C CN1028860 C CN 1028860C
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- powder
- bismuth
- bismuth trioxide
- superfine
- making process
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Abstract
The present invention relates to a preparation method of superfine bismuth trioxide powder, which comprises the following steps: molten metal bismuth is prepared into superfine liquid beads by gas atomization, and the superfine liquid beads are prepared into superfine bismuth trioxide powder by combustion in an atomization chamber simultaneously. The average particle size of the powder is from 1 to 8 mu m, phase structure of the powder is tetragonal crystal system (alpha-Bi2O3), and the color of the powder is light yellow. The present invention has the advantages of short process flow, high efficiency, low cost, good quality of the powder, etc. The bismuth trioxide powder has wide application for medicine, chemical industry, cosmetics and electronic industry.
Description
The present invention is relevant with powder by atomization.
Bismuthous oxide bismuth trioxide is a kind of buff powder.Disclosed bismuth metal, liquid medium and oxygen are encased in of the clear 55-18659 of Japan " super-fine metal oxide preparation method of powder " pulverized in the grindstone and method that oxidation generates bismuthous oxide bismuth trioxide becomes fine liquid pearl with the disclosed aqueous solution ultrasonic atomizatio with bismuth salt of Japanese flat 2-233523 " manufacture method of metal oxide powder ", fills into then in the induction coupling heating unit and decomposes and the method for generation bismuthous oxide bismuth trioxide.Though aforesaid method can obtain ultrafine powder, technical process is longer, and equipment complexity, energy consumption are big, the cost height.
Task of the present invention is intended the bismuthous oxide bismuth trioxide of burning generation simultaneously fines in atomization process.
The present invention becomes liquid with bismuth metal elder generation heat fused, and continues heating and make the bismuth metal melt be warming up to 750～900 ℃, is 1～30mm with this superheated liquid metal bismuth by sectional area then
2Thrust-augmenting nozzle and be atomized into fine liquid pearl by means of gas atomization device, and used gas is the oxygen with 0.35～1.5MPa air pressure during gas atomization, make after atomizing the fine liquid pearl of bismuth metal simultaneously again in spray chamber burning generate the bismuthous oxide bismuth trioxide fines.Prepared powder is light yellow, and its mean particle size range is 1～8 μ m.The X ray material phase analysis shows that powder is tetragonal spheroidal (a-Bi
2O
3).The X-ray diffraction relevant data is listed in table 1, and X ray diffracting spectrum is shown in Fig. 1.(table 1 is seen the literary composition back)
The temperature that powder size can be by changing the bismuth metal melt, the pressure of oxygen and the sectional area that the liquid metal bismuth is incorporated into the thrust-augmenting nozzle of nozzle negative pressuren zone in the gas atomization device controlled.
The present invention is that burning generated the bismuthous oxide bismuth trioxide fines when liquid metal bismuth was atomized, thereby technical process is short, production efficiency is high, cost is low and powder quality is good.
Description of drawings: Fig. 1 is X-ray powder diffraction figure
Embodiment: with the bismuth metal heat fused and continue to be warming up to 820 ℃, be that 0.8MPa, thrust-augmenting nozzle sectional area are 7mm at oxygen pressure
2Condition under atomize and the back of burning obtains the bismuthous oxide bismuth trioxide fines, powder size and distribution thereof see Table 2, mean particle size is 4.36 μ m, color is light yellow.
Table 2 powder size and distribution thereof
Size range percentage ratio (Wt%)
0-1μm 18.1
1-2μm 15.7
2-4μm 14.3
4-8μm 20.1
8-12μm 6.0
12-16μm 6.5
16-20μm 5.5
20-28μm 7.9
28-40μm 6.9
Table 1 X ray diffracting data
Diffracted ray order diffraction angle (2 θ) spacing (d value) diffraction peak height
1 21.675 4.0966 165
2 23.131 3.8420 54
3 24.479 3.6333 291
4 25.180 3.5337 101
5 25.647 3.4704 916
6 26.835 3.3194 1496
7 27.303 3.2635 4035
8 27.913 3.1936 831
9 32.418 2.7594 239
10 33.088 2.7050 1375
11 33.395 2.6424 323
12 34.950 2.5643 739
13 35.340 2.5376 310
14 35.855 2.5022 318
15 36.885 2.4348 217
16 37.504 2.3960 485
17 39.980 2.2532 187
18 40.583 2.2211 83
19 41.395 2.1794 202
20 41.820 2.1582 209
21 42.287 2.1354 253
22 44.300 2.0430 115
23 45.960 2.0102 151
24 46.290 1.9596 1036
25 47.536 1.9111 220
26 48.470 1.8765 522
27 49.420 1.8426 272
Diffracted ray order diffraction angle (2 θ) spacing (d value) diffraction peak height
28 49.922 1.8252 243
29 51.900 1.7602 552
30 52.315 1.7472 807
31 52.971 1.7271 451
32 54.123 1.6931 79
33 54.763 1.6748 660
34 55.380 1.6576 497
35 55.860 1.6445 261
36 56.500 1.6273 99
37 57.793 1.594 340
38 58.225 1.5832 223
39 58.991 1.5844 352
40 61.427 1.5081 185
41 62.346 1.4881 230
42 63.539 1.4630 175
43 65.340 1.4269 61
44 66.244 1.4096 123
45 66.831 1.3987 214
46 67.829 1.3805 198
47 68.601 1.3668 174
Claims (1)
1, micro powder making process of bismuth trioxide, it is characterized in that the bismuth metal heat fused, and make melt continue to be warming up to 750～900 ℃, then by gas atomization device, be that the oxygen of 0.35～1.5MPa and the sectional area of fused mass flow guiding pipe are 1～30mm feeding pressure
2Condition under, make superheated bismuth metal melt atomizing, and generate the bismuthous oxide bismuth trioxide fines in the spray chamber burning simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92107155 CN1028860C (en) | 1992-09-28 | 1992-09-28 | Micro powder making process of bismuth trioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92107155 CN1028860C (en) | 1992-09-28 | 1992-09-28 | Micro powder making process of bismuth trioxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1084825A CN1084825A (en) | 1994-04-06 |
| CN1028860C true CN1028860C (en) | 1995-06-14 |
Family
ID=4942712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92107155 Expired - Fee Related CN1028860C (en) | 1992-09-28 | 1992-09-28 | Micro powder making process of bismuth trioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1028860C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100584763C (en) * | 2006-11-10 | 2010-01-27 | 宝山钢铁股份有限公司 | Method for preparing nano bismuth oxide |
-
1992
- 1992-09-28 CN CN 92107155 patent/CN1028860C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1084825A (en) | 1994-04-06 |
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| C14 | Grant of patent or utility model | ||
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