CN117142843A - 中硼硅玻璃管成型用旋转管及其制备方法 - Google Patents
中硼硅玻璃管成型用旋转管及其制备方法 Download PDFInfo
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- 239000005388 borosilicate glass Substances 0.000 title claims abstract description 51
- 238000000465 moulding Methods 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 238000005245 sintering Methods 0.000 claims abstract description 39
- 239000000843 powder Substances 0.000 claims abstract description 37
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 34
- 239000010431 corundum Substances 0.000 claims abstract description 34
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 30
- 239000002245 particle Substances 0.000 claims abstract description 29
- 239000011230 binding agent Substances 0.000 claims abstract description 23
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims abstract description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004927 clay Substances 0.000 claims abstract description 11
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 19
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 10
- 238000004519 manufacturing process 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 7
- 238000005056 compaction Methods 0.000 claims description 6
- 238000007580 dry-mixing Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 229910052845 zircon Inorganic materials 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 2
- 229920001732 Lignosulfonate Polymers 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical group [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 2
- 230000035939 shock Effects 0.000 abstract description 9
- 230000003628 erosive effect Effects 0.000 abstract description 8
- 238000010304 firing Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 20
- 238000009472 formulation Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 238000000462 isostatic pressing Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 6
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- 229910052851 sillimanite Inorganic materials 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical class [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- 229910052664 nepheline Inorganic materials 0.000 description 2
- 239000010434 nepheline Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 235000012222 talc Nutrition 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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- 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
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Abstract
本发明公开了中硼硅玻璃管成型用旋转管及其制备方法,属于旋转管技术领域。其技术方案为:包括以下质量百分比的组分,其中除粘结剂以外的其余组分的总质量以100%计,粘结剂以占其余组分总质量的百分比计:粒径为0.5‑1mm的刚玉颗粒20‑30%;粒径为0.1‑0.5mm的刚玉颗粒15‑30%;粒径≤45μm的刚玉细粉10‑20%;氧化铝微粉5‑15%;莫来石细粉10‑20%;锆质细粉10‑20%;促烧结剂3‑10%;粘结剂3‑5%;促烧结剂为粘土和稀土氧化物的组合物。本发明提高了旋转管的耐侵蚀性,且烧成不开裂,使用过程不炸裂、不开裂,抗热震性大大提高。
Description
技术领域
本发明涉及旋转管技术领域,具体涉及中硼硅玻璃管成型用旋转管及其制备方法。
背景技术
旋转管是影响玻璃拉管系统稳定性的最关键部件,目前国内丹纳法的旋转管材质主要为硅铝系列,矿物相为刚玉、莫来石及硅线石,国外先进的旋转管产品为锆英石材质。硅铝系列旋转管中,莫来石及硅线石矿物很容易与中硼硅玻璃起反应,降低旋转管的耐侵蚀性;进口的锆英石质旋转管在使用中,也存在着抗热震性能不佳导致产品炸裂的现象,因此需要耐侵蚀性和抗热震性能同时具备的新材质来生产旋转管。根据玻璃管厂家的实际生产条件,旋转管需至少维持2-3个月以上的使用寿命,才能达到有效降低中硼硅玻璃的生产成本。
中国发明专利CN110282989A公开了一种旋转管及其制备方法,原料组成如下:废电熔锆刚玉砖30-50%、莫来石20-30%、硅线石5-10%、高岭土5-10%、纳米氧化铝1-20%、烧结剂0.3-5%;废电熔锆刚玉原料为骨料材质,粒径配比为:0.045-1mm 40-80%、1-2mm 20-60%;通过等静压成型,高温1480-1520℃烧成后得制品。但是考虑到烧成后矿物相中除斜锆石、刚玉外,含大量的莫来石和硅线石,高温下与中硼硅玻璃容易反应,莫来石分解为霞石及刚玉相,导致其耐侵蚀能力不佳。
中国发明专利CN114988894A公开了一种轻质抗热震莫来石堇青石质旋转管及其制备方法,原料包括50-70wt.%的高纯烧结莫来石、8-20wt.%的滑石、7-15wt.%的氧化铝微粉、4-10wt.%的硅石粉和3-25wt.%的结合粘土;滑石的主要化学成分为:MgO 31-36wt.%、SiO244-48wt.%,粒度为≤0.044mm;原料经搅拌锅干湿混合过程后,等静压成型,在1350-1420℃烧成得产品。制得的产品热膨胀系数低(20-1000℃),为3.5-5.0×10-6/K,热震稳定性高:热震实验(1100℃-水冷)经过20次循环不破裂,适用于玻璃窑旋转管用材。但是该专利中,莫来石、堇青石与中硼硅玻璃反应剧烈,不适合中硼硅玻璃管成型用。
因此需要在解决现有材质的耐侵蚀性能差的基础上,同时提高材质的耐热震性能,以延长中硼硅玻璃管成型用旋转管的使用寿命。
发明内容
本发明要解决的技术问题是:克服现有技术的不足,提供中硼硅玻璃管成型用旋转管及其制备方法,提高了旋转管的耐侵蚀性,且烧成不开裂,使用过程不炸裂、不开裂,抗热震性大大提高。
本发明的技术方案为:
一方面,本发明提供了中硼硅玻璃管成型用旋转管,包括以下质量百分比的组分,其中除粘结剂以外的其余组分的总质量以100%计,粘结剂以占其余组分总质量的百分比计:
粒径为0.5-1mm的刚玉颗粒 20-30%;
粒径为0.1-0.5mm的刚玉颗粒 15-30%;
粒径≤45μm的刚玉细粉 10-20%;
氧化铝微粉 5-15%;
莫来石细粉 10-20%;
锆质细粉 10-20%;
促烧结剂 3-10%;
粘结剂 3-5%;
促烧结剂为粘土和稀土氧化物的组合物。
优选的,所述刚玉颗粒和刚玉细粉为白刚玉或板状刚玉,刚玉颗粒和刚玉细粉的总质量占除粘结剂以外其余组分总质量的50-65%。
优选的,所述氧化铝微粉的粒径≤10μm。
优选的,所述莫来石细粉为Al2O3质量百分比大于70%的烧结莫来石或电熔莫来石细粉,粒径≤45μm。
优选的,所述锆质细粉为锆莫来石粉和锆英石粉中的一种或两种,粒径≤45μm。
优选的,所述促烧结剂中,粘土为粒径≤45μm的大同土,稀土氧化物为粒径≤5μm的氧化钇细粉。
优选的,所述促烧结剂中,粘土的质量百分比为1.5-5%,稀土氧化物的质量比为1.5-5%。
优选的,所述粘结剂为木质素磺酸镁溶液或六偏磷酸钠溶液。
另一方面,本发明提供了上述中硼硅玻璃管成型用旋转管的制备方法,包括如下步骤:
S1将除粘结剂以外的其余组分倒入强力混炼机,干混3-5min;再加入粘结剂混炼3-5min;
S2使用筛网筛分去除混炼好的泥料中的团粒;
S3过筛后的泥料倒入模具中,等静压成型为固定的形状和尺寸的坯体;
S4将坯体烘干;
S5烘干后的坯体装入窑炉内,升温至1400-1600℃,保温8-24h烧结;
S6烧结后加工成中硼硅玻璃管成型用旋转管。
优选的,步骤S4中,烘干温度为100-150℃,烘干时间为8-24h。
本发明与现有技术相比,具有以下有益效果:
1. 本发明制得的旋转管耐中硼硅玻璃侵蚀性显著改善,采用了致密的白刚玉或板状刚玉颗粒作为骨料颗粒,自身具备较高的抗侵蚀性;并引入稀土氧化物,烧结后,与氧化铝形成钇铝石榴石的结合相,与莫来石细粉在高温下反应,形成自合成的莫来石晶体,在基质中钇铝石榴石、氧化锆、莫来石结晶均匀分布,显著提高了基质细粉耐中硼硅玻璃的侵蚀性。本发明的方法简单易行,解决了旋转管烧成和使用中开裂的问题,产品热稳定性高;通过在细粉中引入一定量的锆质细粉、粘土和稀土氧化物的组合物,显著改善了材质的耐侵蚀性,提高了中硼硅玻璃管成型用旋转管的使用寿命。
2. 本发明在基质中引入锆质细粉,其中的氧化锆能起到增韧作用,同时钇铝石榴石和自合成莫来石晶体在生成后形成微膨胀,使得大尺寸产品烧成不开裂,使用过程不炸裂、不开裂,抗热震性大大提高。
3. 本发明采用等静压成型方式,使用粘土和稀土氧化物促烧结剂,使得刚玉、莫来石达到低温烧结及有效结合,制备的旋转管致密度高、耐压强度高,从而延长了产品的使用寿命。
具体实施方式
为了使本技术领域的人员更好地理解本发明中的技术方案,下面将结合本发明的实施例,对本发明的技术方案进行清楚、完整地描述。
实施例1
本实施例的中硼硅玻璃管成型用旋转管的配方如表1所示,制备方法包括以下步骤:
S1将除粘结剂以外的其余组分倒入强力混炼机,干混3min;再加入粘结剂混炼3min;
S2使用3mm筛网筛分去除混炼好的泥料中的团粒;
S3过筛后的泥料倒入模具中,等静压成型为固定的形状和尺寸的坯体,等静压压力为150MPa;
S4将坯体于100℃下烘干24h;
S5烘干后的坯体装入窑炉内,升温至1400℃,保温24h烧结;
S6烧结后加工成中硼硅玻璃管成型用旋转管。
实施例2
本实施例的中硼硅玻璃管成型用旋转管的配方如表1所示,制备方法包括以下步骤:
S1将除粘结剂以外的其余组分倒入强力混炼机,干混4min;再加入粘结剂混炼4min;
S2使用3mm筛网筛分去除混炼好的泥料中的团粒;
S3过筛后的泥料倒入模具中,等静压成型为固定的形状和尺寸的坯体,等静压压力为150MPa;
S4将坯体于120℃下烘干12h;
S5烘干后的坯体装入窑炉内,升温至1550℃,保温12h烧结;
S6烧结后加工成中硼硅玻璃管成型用旋转管。
实施例3
本实施例的中硼硅玻璃管成型用旋转管的配方如表1所示,制备方法包括以下步骤:
S1将除粘结剂以外的其余组分倒入强力混炼机,干混5min;再加入粘结剂混炼5min;
S2使用3mm筛网筛分去除混炼好的泥料中的团粒;
S3过筛后的泥料倒入模具中,等静压成型为固定的形状和尺寸的坯体,等静压压力为150MPa;
S4将坯体于150℃下烘干8h;
S5烘干后的坯体装入窑炉内,升温至1600℃,保温8h烧结;
S6烧结后加工成中硼硅玻璃管成型用旋转管。
实施例4
本实施例的中硼硅玻璃管成型用旋转管的配方如表1所示,制备方法包括以下步骤:
S1将除粘结剂以外的其余组分倒入强力混炼机,干混3min;再加入粘结剂混炼3min;
S2使用3mm筛网筛分去除混炼好的泥料中的团粒;
S3过筛后的泥料倒入模具中,等静压成型为固定的形状和尺寸的坯体,等静压压力为150MPa;
S4将坯体于150℃下烘干12h;
S5烘干后的坯体装入窑炉内,升温至1500℃,保温12h烧结;
S6烧结后加工成中硼硅玻璃管成型用旋转管。
表1 实施例1-4的中硼硅玻璃管成型用旋转管的配方
对比例1
对比例1的中硼硅玻璃管成型用旋转管的配方如表2所示,制备方法同实施例1,但在步骤S3中,将过筛后的泥料倒入模具中,等静压成型为固定形状和尺寸的坯体时,坯体成型强度低,无法压制成坯体并烧成成品。
对比例2
对比例2的中硼硅玻璃管成型用旋转管的配方如表2所示,制备方法同实施例1。
对比例3
对比例3的中硼硅玻璃管成型用旋转管的配方如表2所示,制备方法同实施例1。
对比例4
对比例4的中硼硅玻璃管成型用旋转管的配方如表2所示,制备方法同实施例1。
对比例5
对比例5的中硼硅玻璃管成型用旋转管的配方同实施例1,区别在于:制备时,步骤S5中,烧结温度为1350℃。
表2 对比例1-4的中硼硅玻璃管成型用旋转管的配方
对实施例1-4及对比例2-5制备的中硼硅玻璃管成型用旋转管进行性能测试,测试结果如表3-4所示:
表3 实施例1-4制备的中硼硅玻璃管成型用旋转管的性能测试结果
表4 对比例2-5制备的中硼硅玻璃管成型用旋转管的性能测试结果
与实施例1相比,对比例1的刚玉料中粗颗粒含量过多,使得成型的坯体强度明显降低,无法进行产品的烧成,推测是因为等静压成型过程中细粉料含量较少,使得颗粒周围无法得到细粉的充分包覆,达不到骨料和细粉的有效结合效果,导致坯体强度降低。
由表3-4可以看出,对比例2的促烧结剂中未添加氧化钇,烧成的产品耐压强度明显降低至66.8MPa,且在中硼硅玻璃侵蚀试验中,出现刚玉结石现象。这显然是因为对比例2未添加氧化钇,因此氧化铝无法与其反应生成结合相钇铝石榴石,同时无稀土氧化物的促烧结作用,莫来石细粉于高温下自合成的效果变差,达不到促进烧结的效果。
对比例3中未添加氧化铝微粉,烧成的产品显气孔率明显提高到了24%,体积密度由之前的2.9g/cm3降低到2.62g/cm3,耐压强度降低为73.2MPa,且在中硼硅玻璃侵蚀试验中,出现刚玉结石现象。这是因为对比例3未添加氧化铝,同样无法与氧化钇形成结合相钇铝石榴石,达不到促进烧结的作用,导致各性能指标降低。
对比例4未添加氧化锆,无氧化锆的增韧,热稳定性较低;且在中硼硅玻璃侵蚀试验中,出现刚玉结石现象,这是因为中硼硅玻璃中的碱金属、氧化硼导致莫来石细粉分解,产生霞石化现象,刚玉从中脱熔,旋转管产品产生膨胀。
对比例5的烧结温度过低,氧化铝与氧化钇未进行充分反应,达不到结合的效果;同样促烧结剂中的氧化钇在低于1400℃的低温下,促进莫来石的二次莫来石化反应不强烈,从而导致产品未达到烧结效果。
综上,本发明采用等静压成型方式和高温烧成,使得制备的中硼硅玻璃管成型用旋转管耐压强度高、显气孔率适中;通过添加氧化锆,起到强化增韧的作用,有利于产品热稳定性的提高;同时稀土氧化物与氧化铝形成钇铝石榴石结合相,有助于提高抗中硼硅玻璃的侵蚀性。
Claims (10)
1.中硼硅玻璃管成型用旋转管,其特征在于,包括以下质量百分比的组分,其中除粘结剂以外的其余组分的总质量以100%计,粘结剂以占其余组分总质量的百分比计:
粒径为0.5-1mm的刚玉颗粒 20-30%;
粒径为0.1-0.5mm的刚玉颗粒 15-30%;
粒径≤45μm的刚玉细粉 10-20%;
氧化铝微粉 5-15%;
莫来石细粉 10-20%;
锆质细粉 10-20%;
促烧结剂 3-10%;
粘结剂 3-5%;
促烧结剂为粘土和稀土氧化物的组合物。
2.如权利要求1所述的中硼硅玻璃管成型用旋转管,其特征在于,所述刚玉颗粒和刚玉细粉为白刚玉或板状刚玉,刚玉颗粒和刚玉细粉的总质量占除粘结剂以外其余组分总质量的50-65%。
3.如权利要求1所述的中硼硅玻璃管成型用旋转管,其特征在于,所述氧化铝微粉的粒径≤10μm。
4.如权利要求1所述的中硼硅玻璃管成型用旋转管,其特征在于,所述莫来石细粉为Al2O3质量百分比大于70%的烧结莫来石或电熔莫来石细粉,粒径≤45μm。
5.如权利要求1所述的中硼硅玻璃管成型用旋转管,其特征在于,所述锆质细粉为锆莫来石粉和锆英石粉中的一种或两种,粒径≤45μm。
6.如权利要求1所述的中硼硅玻璃管成型用旋转管,其特征在于,所述促烧结剂中,粘土为粒径≤45μm的大同土,稀土氧化物为粒径≤5μm的氧化钇细粉。
7.如权利要求1所述的中硼硅玻璃管成型用旋转管,其特征在于,所述促烧结剂中,粘土的质量百分比为1.5-5%,稀土氧化物的质量比为1.5-5%。
8.如权利要求1所述的中硼硅玻璃管成型用旋转管,其特征在于,所述粘结剂为木质素磺酸镁溶液或六偏磷酸钠溶液。
9.如权利要求1-8任一项所述的中硼硅玻璃管成型用旋转管的制备方法,其特征在于,包括如下步骤:
S1将除粘结剂以外的其余组分倒入强力混炼机,干混3-5min;再加入粘结剂混炼3-5min;
S2使用筛网筛分去除混炼好的泥料中的团粒;
S3过筛后的泥料倒入模具中,等静压成型为固定的形状和尺寸的坯体;
S4将坯体烘干;
S5烘干后的坯体装入窑炉内,升温至1400-1600℃,保温8-24h烧结;
S6烧结后加工成中硼硅玻璃管成型用旋转管。
10.如权利要求9所述的中硼硅玻璃管成型用旋转管的制备方法,其特征在于,步骤S4中,烘干温度为100-150℃,烘干时间为8-24h。
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