CN111718184A - 一种煅烧高温烤箱用氧化镁粉、其制备方法及用途 - Google Patents
一种煅烧高温烤箱用氧化镁粉、其制备方法及用途 Download PDFInfo
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- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 87
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000000843 powder Substances 0.000 title claims abstract description 48
- 238000001354 calcination Methods 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000005995 Aluminium silicate Substances 0.000 claims description 21
- 235000012211 aluminium silicate Nutrition 0.000 claims description 21
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 21
- 239000000454 talc Substances 0.000 claims description 20
- 229910052623 talc Inorganic materials 0.000 claims description 20
- 239000000126 substance Substances 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 239000003921 oil Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 230000004048 modification Effects 0.000 claims description 9
- 238000012986 modification Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 150000004645 aluminates Chemical class 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000007822 coupling agent Substances 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 2
- 230000005672 electromagnetic field Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000002715 modification method Methods 0.000 claims description 2
- 239000003607 modifier Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 7
- 239000004927 clay Substances 0.000 claims 2
- 238000010438 heat treatment Methods 0.000 abstract description 16
- 238000009413 insulation Methods 0.000 abstract description 10
- 230000015556 catabolic process Effects 0.000 abstract description 8
- 238000005485 electric heating Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002253 acid Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 4
- 241001089723 Metaphycus omega Species 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical class [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
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Abstract
本发明提供一种煅烧高温烤箱用氧化镁粉、其制备方法及用途。本发明煅烧高温烤箱用氧化镁粉包括重量配比如下的各组分:MgO 95‑99份;CaO 0.5‑1.2份;Fe2O30.25‑0.5份;Al2O30.1‑0.4份;SiO21.0‑2.0份;水(LOI)≤0.2份。本发明还公开了煅烧高温烤箱用氧化镁粉的制备方法。本发明煅烧高温烤箱用氧化镁粉的耐温性,寿命,绝缘和抗击穿性能优于高温烤箱用氧化镁。采用该氧化镁粉制备的发热管符合国家对于电加热元件泄漏电流的要求。
Description
技术领域
本发明涉及材料技术,尤其涉及一种煅烧高温烤箱用氧化镁粉、其制备方法及用途。
背景技术
随着人们生活水平的提高,高温烤箱走进千家万户,方便人们的生活。但也凸显出目前高温烤箱寿命短,绝缘性和抗击穿性差的弱点。又因其特殊性,不能选用无防潮性能的高温粉,只可选用具有防潮和耐高温的中高温改性镁粉。
目前高温烤箱用氧化镁制作的发热管在空气中干烧2000小时,泄漏情况如表1所示:
表1目前高温烤箱用氧化镁制作的发热管在空气中干烧泄漏情况
时间(小时) | 1 | 2 | 3 | 4 | 5 |
泄漏(mA) | 0.258 | 0.264 | 0.271 | 0.280 | 0.289 |
时间(小时) | 10 | 20 | 40 | 60 | 80 |
泄漏(mA) | 0.301 | 0.337 | 0.368 | 0.397 | 0.419 |
时间(小时) | 100 | 200 | 400 | 800 | 1000 |
泄漏(mA) | 0.447 | 0.476 | 0.498 | 0.523 | 0.554 |
时间(小时) | 1200 | 1400 | 1600 | 1800 | 2000 |
泄漏(mA) | 0.577 | 0.602 | 0.687 | 0.743 | 0.815 |
发热管在通电结束,冷却至室温(25℃,80%RH)后测试绝缘(2500V条件下)100MΩ,抗击穿性(冷态切断电流0.5mA)1430V。
综上,目前高温烤箱用氧化镁制作的发热管不符合国家对于电加热元件泄漏电流≤0.75mA的要求。
发明内容
本发明的目的在于,针对目前高温烤箱用氧化镁制备的发热管在空气中干烧泄漏情况不佳的问题,提出一种煅烧高温烤箱用氧化镁粉,该氧化镁粉的耐温性,寿命,绝缘和抗击穿性能优于高温烤箱用氧化镁。采用该氧化镁粉制备的发热管符合国家对于电加热元件泄漏电流的要求。
为实现上述目的,本发明采用的技术方案是:一种煅烧高温烤箱用氧化镁粉包括重量配比如下的各组分:
进一步地,所述煅烧高温烤箱用氧化镁粉包括重量配比如下的各组分:
本发明的另一个目的还公开了一种煅烧高温烤箱用氧化镁粉的制备方法,包括以下步骤:
步骤1、将40-300目电熔氧化镁粉经过高强度电磁选,去除电熔氧化镁中含有磁性的物质;
步骤2、将电熔氧化镁颗粒置于高温回转炉中1100℃-1200℃处理60-120分钟,优选为90分钟,冷却待用;
步骤3、将d≤10mm高岭土进行精细分级,(采用LHB型涡轮式气流分级机进行精细分级)置于隔焰式回转窑中800℃-900℃煅烧1-3小时,优选为2小时;
步骤4、精细分级煅烧后的高岭土用表面改性机进行表面改性处理;得到d≤0.02mm,含量在90%±3%的超细煅烧高岭土;
步骤5、将d≤10mm滑石置于立式干燥机800℃-1000℃进行干燥,超细粉磨至500-800目;
步骤6、将硅酸锆粉在800℃-900℃烘制1-3小时;
步骤7、将二氧化硅粉在250℃-350℃烘制1-2小时;
步骤8、将氧化镁、超细煅烧高岭土、滑石、硅酸锆粉和二氧化硅粉按照重量比为100:3-6:2-5:1-3:3-5在容器中混合;
步骤9、将高含氢有机硅树脂、高含氢有机硅油、铝酸酯偶联剂和溶剂油按照体积比为1-3:1-4:20-30:60-80配置成溶液;
步骤10、将步骤8的混合物与步骤9的溶液混合制得混合湿料;
步骤11、将混合湿料置于低温回转炉内150℃-300℃烘制1-2小时,经高频振动筛筛分,筛下尺寸小于0.59mm;
步骤12、将筛分得到的氧化镁高强度电磁选,去除含有磁性的物质,制备得到煅烧高温烤箱用氧化镁粉。
进一步地,步骤1中电熔氧化镁经过破碎机粉碎至40-300目,电熔氧化镁粒度分布如下:40目≤3.0%,300目≤5.0%。本发明如无特殊说明,%均为质量百分比。
进一步地,步骤1高强度电磁选磁场强度10000高斯-15000高斯,时间根据实际情况调整。
进一步地,步骤3中d≤10mm高岭土由高岭土原料经过颚式破碎机破碎制得。
进一步地,步骤4中表面改性剂包括有机硅树脂0.05%和溶剂油0.1%,改性方法为化学包覆法。
进一步地,步骤5中d≤10mm滑石由滑石原料经过锤式破碎机破碎制得。
进一步地,步骤6滑石中酸不溶物≥95.0%,酸溶铁(以Fe2O3)≤0.15%,烧失量(1200℃)≤2.00%,磁铁吸出物≤0.02%,水分≤0.2%;
进一步地,步骤12中高强度电磁选磁场强度10000高斯-15000高斯,时间根据实际情况调整。
本发明的另一个目的还公开了一种煅烧高温烤箱用氧化镁粉在煅烧高温烤箱领域的用途。
本发明煅烧高温烤箱用氧化镁粉、其制备方法及用途,与现有技术相比较具有以下优点:
1)采用本发明煅烧高温烤箱用氧化镁粉制备的发热管在通电结束,冷却至室温(25℃,80%RH)后测试绝缘(2500V条件下)500MΩ,抗击穿性(冷态切断电流0.5mA)1760V。
2)本发明煅烧高温烤箱用氧化镁粉制备的发热管符合国家对于电加热元件泄漏电流≤0.75mA的要求。
3)本发明煅烧高温烤箱用氧化镁粉的耐温性,寿命,绝缘和抗击穿性能优于高温烤箱用氧化镁。
具体实施方式
以下结合实施例对本发明进一步说明:
实施例1
本实施例公开了一种煅烧高温烤箱用氧化镁粉,包括重量配比如下的各组分:
本实施例煅烧高温烤箱用氧化镁粉的制备步骤如下:
1.将电熔氧化镁经过破碎机粉碎至40-300目,粒度分布如下:40目≤3.0%,300目≤5.0%;
2.将步骤1得到的电熔氧化镁颗粒经过高强度电磁选,去除电熔氧化镁中含有磁性的物质;
3.将步骤2得到的电熔氧化镁颗粒经过1150℃高温回转炉处理90分钟,得到的电熔氧化镁经过高强度电磁选去除氧化镁中的含有磁性的物质,冷却待用;
4.将高岭土原料经过颚式破碎机破碎至d≤10mm;然后进行精细分级;
5.将步骤4直接给入到隔焰式回转窑进行800℃-900℃煅烧2小时;
6.将步骤5得到的精细分级煅烧后的高岭土用表面改性机进行表面改性处理;得到d≤0.02mm,含量在90%±3%的超细煅烧高岭土;
7.将滑石原料经过锤式破碎机破碎至d≤10mm,进入立式干燥机800℃-1000℃进行干燥;
8.将步骤7得到的滑石进行超细粉磨得到目数为500-800目,酸不溶物≥95.0%,酸溶铁(以Fe2O3)≤0.15%,烧失量(1200℃)≤2.00%,磁铁吸出物≤0.02%,水分≤0.2%;
9.将硅酸锆粉末在800℃-900℃进行烘制1-3小时;
10.将二氧化硅粉末在250℃-350℃进行烘制1-2小时;
11.取步骤3得到的氧化镁,步骤6得到的高岭土,步骤8得到的滑石,步骤9得到的硅酸锆粉,步骤11得到的二氧化硅按照重量比为100:3-6:2-5:1-3:3-5的比例在容器中搅拌均匀;
12.将高含氢有机硅树脂、高含氢有机硅油、铝酸酯偶联剂、溶剂油按照体积比为1-3:1-4:20-30:60-80的比例配置成溶液;
13.将步骤12得到的溶液加入到11的容器中,搅拌均匀;
14.将步骤13得到混合湿料在150℃-300℃低温回转炉内烘制1-2小时;
15.将步骤14得到的高温烤箱用氧化镁经过高频振动筛筛分;
16.将步骤15得到的高温烤箱用氧化镁高强度电磁选,去除高温烤箱用氧化镁中含有磁性的物质,得到的成品即是一种新型煅烧高温烤箱用氧化镁粉。
本实施例煅烧高温烤箱用氧化镁制作的发热管在空气中干烧2000小时,泄漏如表2所示:
表2煅烧高温烤箱用氧化镁制作的发热管在空气中干烧泄漏情况
时间(小时) | 1 | 2 | 3 | 4 | 5 |
泄漏(mA) | 0.213 | 0.220 | 0.228 | 0.243 | 0.259 |
时间(小时) | 10 | 20 | 40 | 60 | 80 |
泄漏(mA) | 0.271 | 0.282 | 0.296 | 0.315 | 0.336 |
时间(小时) | 100 | 200 | 400 | 800 | 1000 |
泄漏(mA) | 0.360 | 0.385 | 0.412 | 0.439 | 0.469 |
时间(小时) | 1200 | 1400 | 1600 | 1800 | 2000 |
泄漏(mA) | 0.491 | 0.526 | 0.565 | 0.601 | 0.643 |
发热管在通电结束,冷却至室温(25℃,80%RH)后测试绝缘(2500V条件下)500MΩ,抗击穿性(冷态切断电流0.5mA)1760V。
通过以上数据可以看出,本实施例电加热元件泄漏电流≤0.75mA,符合国家要求。本实施例煅烧高温烤箱用氧化镁的耐温性,寿命,绝缘和抗击穿性能优于高温烤箱用氧化镁。
实施例2
本实施例公开了一种煅烧高温烤箱用氧化镁粉,包括重量配比如下的各组分:
本实施例煅烧高温烤箱用氧化镁粉的制备步骤如下:
1.将电熔氧化镁经过破碎机粉碎至40-300目,粒度分布如下:40目≤3.0%,300目≤5.0%;
2.将步骤1得到的电熔氧化镁颗粒经过高强度电磁选,去除电熔氧化镁中含有磁性的物质;
3.将步骤2得到的电熔氧化镁颗粒经过1150℃高温回转炉处理90分钟,得到的电熔氧化镁经过高强度电磁选去除氧化镁中的含有磁性的物质,冷却待用;
4.将高岭土原料经过颚式破碎机破碎至d≤10mm;然后进行精细分级;
5.将步骤4直接给入到隔焰式回转窑进行800℃-900℃煅烧2小时;
6.将步骤5得到的精细分级煅烧后的高岭土用表面改性机进行表面改性处理;得到d≤0.02mm,含量在90%±3%的超细煅烧高岭土;
7.将滑石原料经过锤式破碎机破碎至d≤10mm,进入立式干燥机800℃-1000℃进行干燥;
8.将步骤7得到的滑石进行超细粉磨得到目数为500-800目,酸不溶物≥95.0%,酸溶铁(以Fe2O3)≤0.15%,烧失量(1200℃)≤2.00%,磁铁吸出物≤0.02%,水分≤0.2%;
9.将硅酸锆粉末在800℃-900℃进行烘制1-3小时;
10.将二氧化硅粉末在250℃-350℃进行烘制1-2小时;
11.取步骤3得到的氧化镁,步骤6得到的高岭土,步骤8得到的滑石,步骤9得到的硅酸锆粉,步骤11得到的二氧化硅按照重量比为100:3-6:2-5:1-3:3-5的比例在容器中搅拌均匀;
12.将高含氢有机硅树脂、高含氢有机硅油、铝酸酯偶联剂、溶剂油按照体积比为1-3:1-4:20-30:60-80的比例配置成溶液;
13.将步骤12得到的溶液加入到11的容器中,搅拌均匀;
14.将步骤13得到混合湿料在150℃-300℃低温回转炉内烘制1-2小时;
15.将步骤14得到的高温烤箱用氧化镁经过高频振动筛筛分;
16.将步骤15得到的高温烤箱用氧化镁高强度电磁选,去除高温烤箱用氧化镁中含有磁性的物质,得到的成品即是一种新型煅烧高温烤箱用氧化镁粉。
本实施例煅烧高温烤箱用氧化镁制作的发热管在空气中干烧2000小时,泄漏如表3所示:
表3煅烧高温烤箱用氧化镁制作的发热管在空气中干烧泄漏情况
时间(小时) | 1 | 2 | 3 | 4 | 5 |
泄漏(mA) | 0.219 | 0.224 | 0.229 | 0.245 | 0.260 |
时间(小时) | 10 | 20 | 40 | 60 | 80 |
泄漏(mA) | 0.273 | 0.286 | 0.297 | 0.318 | 0.339 |
时间(小时) | 100 | 200 | 400 | 800 | 1000 |
泄漏(mA) | 0.362 | 0.387 | 0.415 | 0.442 | 0.473 |
时间(小时) | 1200 | 1400 | 1600 | 1800 | 2000 |
泄漏(mA) | 0.496 | 0.527 | 0.571 | 0.608 | 0.652 |
发热管在通电结束,冷却至室温(25℃,80%RH)后测试绝缘(2500V条件下)500MΩ,抗击穿性(冷态切断电流0.5mA)1720V。
通过以上数据可以看出,本实施例电加热元件泄漏电流≤0.75mA,符合国家要求。本实施例煅烧高温烤箱用氧化镁的耐温性,寿命,绝缘和抗击穿性能优于高温烤箱用氧化镁。
最后应说明的是:以上各实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述各实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。
Claims (10)
2.一种煅烧高温烤箱用氧化镁粉的制备方法,其特征在于,包括以下步骤:
步骤1、将40-300目电熔氧化镁粉经过高强度电磁选,去除电熔氧化镁中含有磁性的物质;
步骤2、将电熔氧化镁颗粒置于高温回转炉中1100℃-1200℃处理60-120分钟,冷却待用;
步骤3、将d≤10mm高岭土进行精细分级,置于隔焰式回转窑中800℃-900℃煅烧1-3小时;
步骤4、精细分级煅烧后的高岭土用表面改性机进行表面改性处理;得到d≤0.02mm,含量在90%±3%的超细煅烧高岭土;
步骤5、将d≤10mm滑石置于立式干燥机800℃-1000℃进行干燥,超细粉磨至500-800目;
步骤6、将硅酸锆粉在800℃-900℃烘制1-3小时;
步骤7、将二氧化硅粉在250℃-350℃烘制1-2小时;
步骤8、将氧化镁、超细煅烧高岭土、滑石、硅酸锆粉和二氧化硅粉按照重量比为100:3-6:2-5:1-3:3-5在容器中混合;
步骤9、将高含氢有机硅树脂、高含氢有机硅油、铝酸酯偶联剂和溶剂油按照体积比为1-3:1-4:20-30:60-80配置成溶液;
步骤10、将步骤8的混合物与步骤9的溶液混合制得混合湿料;
步骤11、将混合湿料置于低温回转炉内150℃-300℃烘制1-2小时,经高频振动筛筛分;
步骤12、将筛分得到的氧化镁高强度电磁选,去除含有磁性的物质,制备得到煅烧高温烤箱用氧化镁粉。
3.根据权利要求2所述煅烧高温烤箱用氧化镁粉的制备方法,其特征在于,步骤1中电熔氧化镁经过破碎机粉碎至40-300目,电熔氧化镁粒度分布如下:40目≤3.0%,300目≤5.0%。
4.根据权利要求2所述煅烧高温烤箱用氧化镁粉的制备方法,其特征在于,步骤1高强度电磁选磁场强度10000高斯-15000高斯。
5.根据权利要求2所述煅烧高温烤箱用氧化镁粉的制备方法,其特征在于,步骤3中d≤10mm高岭土由高岭土原料经过颚式破碎机破碎制得。
6.根据权利要求2所述煅烧高温烤箱用氧化镁粉的制备方法,其特征在于,步骤4中表面改性剂包括有机硅树脂0.05%和溶剂油0.1%,改性方法为化学包覆法。
7.根据权利要求2所述煅烧高温烤箱用氧化镁粉的制备方法,其特征在于,步骤5中d≤10mm滑石由滑石原料经过锤式破碎机破碎制得。
8.根据权利要求2所述煅烧高温烤箱用氧化镁粉的制备方法,其特征在于,步骤6滑石中酸不溶物≥95.0%,酸溶铁≤0.15%,烧失量≤2.00%,磁铁吸出物≤0.02%,水分≤0.2%。
9.根据权利要求2所述煅烧高温烤箱用氧化镁粉的制备方法,其特征在于,步骤12中高强度电磁选磁场强度10000高斯-15000高斯。
10.一种权利要求1所述煅烧高温烤箱用氧化镁粉在煅烧高温烤箱领域的用途。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113488273A (zh) * | 2021-07-30 | 2021-10-08 | 大石桥市美尔镁制品有限公司 | 一种耐高温高压防潮型防火电缆及其制备方法 |
CN113583294A (zh) * | 2021-07-30 | 2021-11-02 | 大石桥市美尔镁制品有限公司 | 一种耐高温高压防潮型防火电缆用氧化镁、其制备方法及用途 |
CN113582669A (zh) * | 2021-07-30 | 2021-11-02 | 大石桥市美尔镁制品有限公司 | 一种煅烧热水器用氧化镁粉、其制备方法及用途 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103405167A (zh) * | 2013-08-09 | 2013-11-27 | 赵伟 | 家用食品烘烤装置 |
CN103896552A (zh) * | 2014-03-21 | 2014-07-02 | 辽宁华宇镁建材有限公司 | 一种利用菱镁矿废料制备的氯镁防火保温板及其方法 |
CN103971786A (zh) * | 2013-12-27 | 2014-08-06 | 上海实业振泰化工有限公司 | 电烤箱用电工级有机涂层耐高温绝缘氧化镁粉及其生产方法 |
CN108288528A (zh) * | 2018-02-07 | 2018-07-17 | 大石桥市美尔镁制品有限公司 | 一种氧化镁粉绝缘材料和一种柔性电缆 |
US20180215627A1 (en) * | 2016-05-13 | 2018-08-02 | Konoshima Chemical Co., Ltd. | Magnesium oxide powder, and method for producing the same |
CN109835927A (zh) * | 2017-11-28 | 2019-06-04 | 中国科学院大连化学物理研究所 | 一种耐高温、高疏水电工级氧化镁粉及其制备方法 |
-
2020
- 2020-05-18 CN CN202010418064.9A patent/CN111718184A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103405167A (zh) * | 2013-08-09 | 2013-11-27 | 赵伟 | 家用食品烘烤装置 |
CN103971786A (zh) * | 2013-12-27 | 2014-08-06 | 上海实业振泰化工有限公司 | 电烤箱用电工级有机涂层耐高温绝缘氧化镁粉及其生产方法 |
CN103896552A (zh) * | 2014-03-21 | 2014-07-02 | 辽宁华宇镁建材有限公司 | 一种利用菱镁矿废料制备的氯镁防火保温板及其方法 |
US20180215627A1 (en) * | 2016-05-13 | 2018-08-02 | Konoshima Chemical Co., Ltd. | Magnesium oxide powder, and method for producing the same |
CN109835927A (zh) * | 2017-11-28 | 2019-06-04 | 中国科学院大连化学物理研究所 | 一种耐高温、高疏水电工级氧化镁粉及其制备方法 |
CN108288528A (zh) * | 2018-02-07 | 2018-07-17 | 大石桥市美尔镁制品有限公司 | 一种氧化镁粉绝缘材料和一种柔性电缆 |
Non-Patent Citations (1)
Title |
---|
王万军等: "《高岭土的矿物学特征及插层复合物的制备技术》", 30 November 2008, 北京:地质出版社 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113488273A (zh) * | 2021-07-30 | 2021-10-08 | 大石桥市美尔镁制品有限公司 | 一种耐高温高压防潮型防火电缆及其制备方法 |
CN113583294A (zh) * | 2021-07-30 | 2021-11-02 | 大石桥市美尔镁制品有限公司 | 一种耐高温高压防潮型防火电缆用氧化镁、其制备方法及用途 |
CN113582669A (zh) * | 2021-07-30 | 2021-11-02 | 大石桥市美尔镁制品有限公司 | 一种煅烧热水器用氧化镁粉、其制备方法及用途 |
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