Bonding agent for low-melting high-strength microcrystalline alumina ceramic grinding tool and preparation method thereof

A kind of alumina ceramic and binder technology, which is applied in abrasives, manufacturing tools, metal processing equipment, etc., to achieve the effect of small ion radius, strong reaction ability and good grinding performance

Active Publication Date: 2012-10-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the bond is not for microcrysta

Method used

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  • Bonding agent for low-melting high-strength microcrystalline alumina ceramic grinding tool and preparation method thereof
  • Bonding agent for low-melting high-strength microcrystalline alumina ceramic grinding tool and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] molar ratio SiO 2 :Al 2 o 3 :B 2 o 3 :Na 2 O: ZnO: LiF = 46.0: 7.5: 26.0: 16.5: 2.0: 2.0 Weigh the raw material SiO 2 , γ-Al 2 o 3 (nanoscale), H 3 BO 3 、Na 2 CO 3 , ZnO (nanoscale) and LiF, put them into a mortar and mix them evenly, then put them into an alumina crucible, and then calcinate them in a high-temperature resistance furnace with a heating rate of 5°C / min, keep them at 1250°C for 4 hours, take them out Water quenching, drying the surface moisture of the glass frit, putting it into a ball mill, dry grinding at a speed of 400r / min for 1 hour, and sieving to obtain a powdered vitrified bond with a particle size of 5-10 μm.

[0026] The thermogravimetric-differential heat (TG-DSC) curve of gained binder is as follows figure 1 , indicating that there is no weight gain or weight loss when the binder is heated to 800°C, so the properties of the prepared binder are relatively stable; the DSC curve shows that the melting range of the product is wide, fro...

Embodiment 2

[0028] SiO in molar ratio 2 : Al 2 o 3 :B 2 o 3 :Na 2 O: ZnO: LiF = 46.0: 7.5: 26.0: 16.5: 2.0: 2.0 Weigh the raw material SiO 2 , γ-AlOOH (nanoscale), H 3 BO 3 、Na 2 CO 3 , ZnO (nanoscale) and LiF, put them into a mortar and mix them evenly, then put them into an alumina crucible, and then calcinate them in a high-temperature resistance furnace at a heating rate of 4°C / min, keep them at 1200°C for 4 hours, take out Water quenching, drying the surface moisture of the glass frit, putting it into a ball mill, dry grinding at a speed of 450r / min for 40 minutes, and obtaining a powdered vitrified bond with a particle size of 8-10 μm after sieving. , the melting range of the obtained bonding agent is 587.3-720° C., and the flexural strength of the microcrystalline alumina ceramic abrasive test strip after firing at 750° C. is 83.12-93.73 MPa.

Embodiment 3

[0030] molar ratio SiO 2 : Al 2 o 3 :B 2 o 3 :Na 2 O: Li 2 O: ZnO: LiF = 46.0: 7.5: 26.0: 14.5: 2.0: 2.0: 2.0 Weigh the raw material SiO 2 , γ-Al 2 o 3 (nanoscale), H 3 BO 3 、Na 2 CO 3 , Li 2 CO 3 , ZnO (nano-level) and LiF, prepared according to the method of Example 1, the melting range of the obtained binder is 603.4-671 ° C, and the flexural strength of the microcrystalline alumina ceramic abrasive test strip after firing at 725 ° C is 86.61 -103.32MPa.

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Abstract

The invention relates to a bonding agent for a microcrystalline alumina ceramic grinding tool and a preparation method thereof. The bonding agent comprises the following components according to molar percentage: 45-65% of SiO2, 5-20% of Al2O3, 10-30% of B2O3, 8-20% of (M1) 2O, 0-8% of (M2) 2O, 1.5-2.5% of ZnO, and 1.5-2.5% of XF, wherein one or more raw materials adopt nanoscale particles, ZnO and XF are added to increase the liquidity of the bonding agent, and the bonding agent is prepared by calcination, water quenching, drying and ball milling. The bonding agent is stable in performance, good in wettability for microcrystalline alumina abrasive, high in reaction capability, low in initial melting temperature, and can be used for firing a high-strength ceramic grinding tool at the low temperature of 700-800 DEG C. The prepared microcrystalline alumina ceramic grinding tool is good in grinding performance, and can be widely used in the fields of iron and steel, machinery, buildings, aviation, military industry and the like.

Description

technical field [0001] The invention relates to a bonding agent for microcrystalline alumina ceramic grinding tools, in particular to the formulation and preparation method of the bonding agent, and belongs to the field of inorganic non-metallic materials. Background technique [0002] In the 1980s, a new type of corundum abrasive, a microcrystalline ceramic abrasive, appeared in the world, which was synthesized by a sol-gel process and sintered into a high toughness and high hardness abrasive with a grain size of 100-500nm. Compared with ordinary corundum abrasives, its superiority in structure and performance is mainly manifested in: the grain size is one-two-hundredth to one-fifteenth of ordinary abrasives, and during the grinding process, it shows intergranular fracture, while It is not the transgranular fracture of ordinary abrasives, so that new grinding edges can be continuously exposed, which ensures the self-sharpening function of the abrasive tool and the stability...

Claims

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Application Information

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IPC IPC(8): B24D3/14
Inventor 陈代荣刘洋焦秀玲张立
Owner SHANDONG UNIV
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