Quartz sand filter materials are widely used and are indispensable materials for construction and drinking water treatment. However, the quality of quartz sand will also be good or bad. For example: high-purity quartz sand filter material and ordinary quartz sand filter material. Today, the Xiaobian of Gongyi Haijiang introduces in detail the difference between high-purity quartz sand filter and ordinary quartz sand filter. High-purity quartz sand filter material: it is a hard, wear-resistant, chemically stable silicate mineral. Its main mineral component is SiO2. The color of quartz sand is milky white, colorless and translucent, hardness is 7. No cleavage, shell-like fracture, grease luster, density 2.65, bulk density (1-20 mesh is 1.6, 20-200 mesh is 1.5, its chemical, thermal and mechanical properties have obvious anisotropy, insoluble in acid, Slightly soluble in KOH solution, melting point 1750 °C is an important industrial mineral raw material, non-chemical dangerous goods, widely used in glass, casting, ceramics and refractory materials, smelting ferrosilicon, metallurgical flux, metallurgy, construction, chemicals, plastics, rubber, Abrasives and other industries. Common specifications: 0.5-1.0mm 0.6-1.2mm 1-2mm 2-4mm 4-8mm 8-16mm 16-32mm. (mm is millimeter unit), high mechanical strength, strong interception capacity, stable chemical properties It is the ideal material for purified water treatment. The unique physical and chemical properties of high-purity quartz sand filter material make it play an important role in aviation, aerospace, electronics, machinery and today's rapidly developing IT industry, especially its Intrinsic molecular chain Structure, crystal shape and lattice change law, which have high temperature resistance, small thermal expansion coefficient, high insulation, corrosion resistance, piezoelectric effect, resonance effect and its unique optical characteristics, which play a role in many high-tech products. The more important role. Ordinary quartz sand filter material: ordinary quartz sand is generally a kind of water treatment filter material which is made of natural quartz ore, crushed, washed, dried and screened twice; SiO2≥90-99% Fe2O3≤ 0.06-0.02%, refractoriness 1700 ° C, large part of the appearance of large particles, the surface has yellow skin encapsulation. The filter material has: no impurities, no calibration, high density, high mechanical strength, long life cycle of the sewage capacity line, It is an ideal material for chemical water treatment. In addition, a kind of natural quartz sand that has been widely used is also listed as an ordinary quartz sand by experts. Natural quartz sand refers to the non-uniformity of particles formed by natural quartz. Quartz sand, which is low in quartz content and mostly formed in water or seawater, is now widely used in many large factories, such as sea sand and natural sand.
Magnetic materials are fundamental functional materials of electronic industry. As important parts of magnetic materials, hard ferrite materials play a heavyrole in electronic industry, electronic information industry, car industry, motorcycle industry etc. meanwhile, they are also widely used in medical treatment, mining and metallurgy, industrial automation, oil energy industry and civil industry. Ferrite Magnet, Ferrite Magnets, bonded ferrite magnet, barium ferrite magnet, hard ferrite magnet, sintered ferrite magnet, bonded ferrite injection magnet
Mostly Used national standard - SJ285-77 permanent ferrite magnet standard
Value(min/typical in our factory
Br
Hcb(BHC)
Hcj(IHC)
(BH)max
MT
KG
KA/m
Koe
KA/m
KOe
Kj/m3
MGOe
Y10T(=C1)
200/218
2.00/2.18
125/145
1.57/1.82
210/250
2.64/3.14
6.5/8.0
0.8/1.0
Y25
360/370
3.60/3.70
135/150
1.70/1.88
140/170
1.76/2.14
22.5/25.3
2.8/3.2
Y30(=C5)
380/385
3.80/3.85
191/210
2.40/2.64
199/220
2.50/2.51
26.0/28
3.4/3.7
Y30BH
380/390
3.80/3.90
223/235
2.80/2.95
231/245
2.90/3.08
27.0/30.0
3.4/3.7
Y33
410/420
4.10/4.20
220/235
2.77/2.95
225/240
2.83/3.01
31.5/33.0
4.0/4.2
Y35
400/410
4.00/4.10
175/195
2.20/2.45
180/200
2.26/2.51
30.0/32.0
3.8/4.0
C8(=C8A)
385/390
3.85/3.90
235/255
2.95/3.20
242/265
3.05/3.33
27.8/30.0
3.5/3.7
C10
400/410
4.00/4.10
288/300
3.62/3.77
280/287
3.51/3.60
30.4/31.9
3.8/4.0
Chinese standard -sj/T10410 2000 permanent ferrite magnet standard
Br
HcB
HcJ
(BH)max
mT
KG
KA/m
Oe
KA/m
Oe
Kj/m³
MGOe
Y8T
200~235
≥2000
125~160
≥1570
210~280
≥2610
6.5~9.5
≥0.8
Y22H
310~360
≥3100
220~250
≥2770
280~320
≥3520
20.0~24.0
≥2.5
Y25
360~400
≥3600
135~170
≥1700
140~200
≥1760
22.5~28.0
≥2.8
Y26H-1
360~390
≥3600
220~250
≥2512
225~255
≥2830
23.0~28.0
≥2.9
Y26H-2
360-380
≥3600
263-288
≥3300
318-350
≥4000
24.0-28.0
≥3.0
Y27H
370~400
≥3500
225-240
≥2830
235-260
≥2950
25.0~29.0
≥3.1
Y28
370-400
≥3700
175-210
≥2200
180-220
≥2260
26.0-30.0
≥3.3
Y28H-1
380-400
≥3800
240-260
≥3020
250-280
≥3140
27.0-30.0
≥3.1
Y28H-2
360-380
≥3600
271-295
≥3400
382-405
≥1800
26.0-30.0
≥3.3
Y30
370~400
3.7~4.0
175~210
2.20~2.64
180~220
2.26~2.77
26.0~30.0
3.3~3.8
Y30H-1
380~400
≥3800
230-275
≥2890
235-290
≥2950
27.0~32.5
≥3.4
Y30H-2
395-415
≥3950
275-300
≥3460
310-335
≥3900
27.0~32.0
≥3.4
Y32
400~420
≥4000
160~190
≥2010
165~195
≥2070
30.0~33.5
≥3.8
Y32H-1
400-420
≥4000
190-230
≥2390
230-250
≥2890
34.5-35.0
≥4.0
Y32H-2
400-440
≥4000
224-240
≥2810
230-250
≥2890
31.0-34.0
≥3.9
Y33
410~430
≥4100
220~250
≥2760
225~255
≥2830
31.5~35.0
≥4.0
Y33H
410-430
≥4100
250-270
≥3140
250-275
≥3140
31.5-35.0
≥4.0
Y34
420-440
≥4200
200-230
≥2510
205-235
≥2580
32.5-36.0
≥4.1
Y35
430-450
≥4300
215-239
≥2700
217-242
≥2730
33.1-33.2
≥4.2
Y36
440-450
≥4400
247-271
≥3100
250-374
≥4400
35.1-38.3
≥4.4
Y38
440-460
≥4400
285-305
≥3580
294-310
≥3690
36.6-40.6
≥4.6
Y40
450-460
≥4500
330-354
≥4150
340-360
≥4270
37.6-41.8
≥4.7
Demagetization Curves of Permanent Ferrite Magnet
USA standard - permanent ferrite magnet industry standard of USA
Br
HcB
HcJ
(BH)max
mT
KG
KA/m
KOe
KA/e
KOe
kj/m³
MGOe
C1
230
2.3
148
1.86
258
3.5
8.36
1.05
C5
380
3.8
191
2.4
199
2.5
27
3.4
C7
340
3.4
258
3.23
318
4.00
21.9
2.75
C8(=C8A)
385
3.85
235
2.95
242
3.05
27.8
3.5
C8B
420
4.2
232
2.913
236
2.96
32.8
4.12
C9
380
3.8
280
3.516
320
4.01
26.4
3.32
C10
400
4.0
288
3.617
280
3.51
30.4
3.82
C11
430
4.3
200
2.512
204
2.56
34.4
4.32
Japan TDK standard
Composition
Br
Hcb
Hcj
BH max
mT
kG
kA/m
kOe
kA/m
kOe
KJ/m3
MGOe
FB40
SrO6Fe2O3
410+/-10
4.1+/-10
234.8+/-11.9
2.95+/-0.15
238.7+/-15.9
3.0+/-0.2
31.4+/-1.6
3.95+/-0.2
FB3N
SrO6Fe2O3
395+/-15
3.95+/-15
234.8+/-11.9
2.95+/-0.15
238.7+/-15.9
3.0+/-0.2
28.7+/-2.4
3.6+/-0.3
FB3G
SrO6Fe2O3
375+/-15
3.75+/-15
254.6+/-15.9
3.2+/-0.2
270.6+/-19.9
3.4+/-0.25
25.9+/-2.4
3.25+/-0.3
FB3X
SrO6Fe2O3
375+/-15
3.75+/-15
234.8+/-11.9
2.95+/-0.15
238.7+/-15.9
3.0+/-0.2
25.9+/-2.4
3.25+/-0.3
FB1A
SrO6Fe2O3
220+/-15
2.20+/-15
159.2+/-15.9
2.0+/-0.2
258.6+/-19.9
3.25+/-0.25
8.9+/-1.6
1.1+/-0.2
FB5H
SrO6Fe2O3
405+/-15
4.05+/-15
298.4+/-11.9
3.75+/-0.15
322.3+/-11.9
4.05+/-0.15
31.1+/-1.6
3.9+/-0.2
FB4X
SrO6Fe2O3
420+/-10
4.20+/-10
234.8+/-11.9
2.95+/-0.15
238.7+/-15.9
3.0+/-0.2
33.4+/-1.6
4.2+/-0.2
FB4B
SrO6Fe2O3
400+/-10
4.00+/-10
254.6+/-11.9
3.2+/-0.2
262.6+/-19.9
3.3+/-0.25
30.3+/-1.6
3.8+/-0.2
FB4A
SrO/BaO6Fe2O3
410+/-10
4.10+/-10
175.1+/-15.9
2.2+/-0.2
176.7+/-15.9
2.22+/-0.2
31.8+/-1.6
4.0+/-0.2
FBGN
SrO6Fe2O3
440+/-10
4.40+/-10
258.6+/-11.9
3.25+/-0.15
262.6+/-11.9
3.3+/-0.15
36.7+/-1.6
4.6+/-0.2
FB6B
SrO6Fe2O3
420+/-10
4.20+/-10
302.4+/-11.9
3.8+/-0.15
318.3+/-11.9
4.0+/-0.15
33.4+/-1.6
4.2+/-0.2
FB6H
SrO6Fe2O3
400+/-10
4.00+/-10
302.4+/-11.9
3.8+/-0.15
358.1+/-11.9
4.5+/-0.15
30.3+/-1.6
3.8+/-0.2
FB6E
SrO6Fe2O3
380+/-10
3.80+/-10
290.5+/-11.9
3.65+/-0.15
393.9+/-11.9
4.95+/-0.15
27.5+/-1.6
3.45+/-0.2
FB5N
SrO6Fe2O3
440+/-10
4.40+/-10
256.8+/-11.9
2.85+/-0.15
2259.2+/-11.9
2.88+/-0.15
36.7+/-1.6
4.6+/-0.2
FB5B
SrO6Fe2O3
420+/-10
4.20+/-10
262.6+/-11.9
3.3+/-0.15
266.6+/-11.9
3.35+/-0.15
33.4+/-1.6
4.2+/-0.2
The standard from International Electronics Committee(IEC404-8-1)
Allowed Value (min/typical)
Br
Hcb(BHC)
Hcj(IHC)
(BH)max
MT
KG
KA/m
KOe
KA/m
KOe
Kj/m³
MGOe
HF8/22
200/220
2.00/2.20
125/140
1.57/1.76
220/230
2.76/2.89
6.5/6.8
0.8/1.1
HF20/19
320/333
3.20/3.33
170/190
2.14/2.39
190/200
2.39/2.51
20.0/21.0
2.5/2.7
HF20/28
310/325
3.10/3.25
220/230
2.76/2.89
280/290
3.52/3.64
20.0/21.0
2.5/2.7
HF22/30
350/365
3.50/3.65
255/265
3.20/3.33
290/300
3.64/3.77
22.0/23.5
2.8/3.0
HF24/16
350/365
3.50/3.65
155/175
1.95/2.20
160/180
2.01/2.26
24.0/25.5
3.0/3.2
HF24/23
350/365
3.50/3.65
220/230
2.76/2.89
230/240
2.89/3.01
24.0/25.5
3.0/3.2
HF24/35
360/370
3.60/3.70
260/270
3.27/3.39
350/360
4.40/4.52
24.0/25.5
3.0/3.2
HF26/16
370/380
3.70/3.80
155/175
1.95/2.20
160/180
2.01/2.26
26.0/27.0
3.2/3.4
HF26/18
370/380
3.70/3.80
175/190
2.20/2.39
180/190
2.26/2.39
26.0/27.0
3.3/3.4
HF26/24
370/380
3.70/3.80
230/240
2.89/3.01
240/250
3.01/3.14
26.0/27.0
3.3/3.4
HF26/26
370/380
3.70/3.80
230/240
2.89/3.01
260/270
3.27/3.39
26.0/27.0
3.3/3.4
HF26/30
385/395
3.85/3.95
260/270
3.27/3.39
300/310
3.77/3.89
26.0/27.0
3.3/3.4
HF28/26
385/395
3.85/3.95
250/265
3.14/3.33
260/275
3.27/3.45
28.0/30.0
3.5/3.8
HF28/28
385/395
3.85/3.95
260/270
3.27/3.39
280/290
3.50/3.60
28.0/30.0
3.5/3.8
HF30/26
395/405
3.95/4.05
250/260
3.14/3.33
260/270
3.27/3.39
30.0/31.5
3.8/3.9
HF32/17
410/420
4.10/4.20
160/180
2.01/2.26
165/175
2.07/2.20
32.0/33.0
4.0/4.1
HF32/22
410/420
4.10/4.20
215/225
2.70/2.83
220/230
2.76/2.89
32.0/33.0
4.0/4.1
HF32/25
410/420
4.10/4.20
240/250
3.01/3.14
250/260
3.14/3.27
32.0/33.0
4.0/4.1
Physical property of hard ferrite mangets
Mark
Unit
Value
Recoil Permeability
Urce
-
1.05-1.3
Curie temperture
Tc
0C
460
The temperature of Br
α Br
0C-1
-0.2%
The temperature of Hcj
α Hcj
0C-1
0.2-0.5%
Density
D
g/cm3
4.5-5.1
Resistivity
P
Ω.cm
≥104
The coefficient of linear expansion
α R
0C-1
7-15x10-6
Hardness
HV
-
480-580
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Grade
Material
Material
Grade
Grade
Parameters
The difference between high-purity quartz sand filter and ordinary quartz sand filter