CN103551971B - Pottery abrading block vitrified bond - Google Patents

The invention discloses a kind of ceramic abrading block vitrified bond and preparation method thereof, belong to powdered metallurgical material technical field, good to adamantine confining force to reach vitrified bond, and carborundum, Brown Alundum, diamond three coefficient of expansion coupling, the effects such as finished product sintering temperature is low.Vitrified bond is made into by the powder stock of following weight unit's: SiO ₂20 ~ 55, Al ₂o ₃5 ~ 25, ZnO? 0 ~ 5, TiO ₂0 ~ 5, ZrO? 0 ~ 7, Na ₂cO ₃10 ~ 20, Li ₂cO ₃5 ~ 15, H ₃bO ₃8 ~ 30.Ceramic abrading block vitrified bond of the present invention ceramic abrading block is had advantages such as sintering temperature is low, self-sharpening good, sharpness is good, the life-span is long, low-carbon environment-friendly.

Pottery abrading block vitrified bond

Technical field

The present invention relates to a kind of abrading block bonding agent and preparation method, the bonding agent of the ceramic abrading block that the fine grinding operation especially for wall and floor ceramic tile processing uses and preparation method, belong to powdered metallurgical material technical field.

Background technology

Ceramic tile production line is the capital equipment in wall and floor ceramic tile industry, and current national ceramic production line has about 3000, and wherein polish line just has more than 2000, and abrading block annual consumption is very large.The abrading block of ceramic polishing line is mainly divided into three kinds: metal abrading block, silicon carbide grinding block and magnesia abrading block, is respectively used to corase grind, middle fine grinding and polishing.Wherein, middle fine grinding silicon carbide grinding block consumption is maximum, but silicon carbide grinding block exists the shortcomings such as grinding efficiency is low, the life-span is short, and this not only causes polishing process cost relatively high, and also produces great pollution to production environment.

Pottery abrading block (i.e. ceramic base diamond grinding block) is a kind of abrading block of new rise, the primary raw material of pottery abrading block is carborundum, Brown Alundum, diamond, by adding appropriate bonding agent and additive is prepared from, compared with other abrading blocks, have the following advantages: 1. grinding force is strong, grinding tool wearing and tearing are smaller, and during grinding, the shape retention of grinding tool is good, and the precision grinding workpiece is high; 2. the heat produced during grinding is less, and grinding tool heats up lower, can adapt to the effect of various cooling fluid, have more pore in ceramic base diamond grinding block, is conducive to excretion abrasive dust and heat radiation, workpiece of not easily burning during grinding; 3. the self-sharpening of ceramic base diamond grinding block is relatively good, and finishing interlude is long, and finishing is than being easier to.

Therefore ceramic abrading block substitutes silicon carbide grinding block advantageous advantage, but replaces this technology of silicon carbide grinding block and immature in industry with ceramic abrading block.In the preparation process of ceramic abrading block, the quality of bonding agent quality directly affects the performance of ceramic abrading block, vitrified bond must possess following performance: intensity is high, there is higher heat resistance, there is suitable hardness, grinding consumes little, grinding efficiency is high, and the surface of the work precision processed wants high, and filler must be economical.Thus the preparation of vitrified bond is the key technology that ceramic base diamond grinding block makes.

Summary of the invention

The technical issues that need to address of the present invention are to provide vitrified bond and the preparation method of the ceramic abrading block of a kind of wall and floor ceramic tile polish line, to improve the confining force of bonding agent to diamond grinding block, improve the thermal coefficient of expansion of vitrified bond, reduce the sintering temperature of ceramic module finished product.

For solving the problems of the technologies described above, the technical solution used in the present invention is:

A kind of ceramic base diamond grinding block vitrified bond, described vitrified bond is made into by the powder stock of following weight unit's:

SiO ₂20～55，Al ₂O ₃5～25，ZnO0～5，TiO ₂0～5，ZrO0～7，Na ₂CO ₃10～20，Li ₂CO ₃5～15，H ₃BO ₃8～30。

Further improvement of the present invention is: described vitrified bond is made into by the powder stock of following weight unit's:

SiO ₂25～52，Al ₂O ₃5～23，ZnO0～4，TiO ₂0～3，ZrO0～5，Na ₂CO ₃11～17，Li ₂CO ₃5～13，H ₃BO ₃8～28。

Further improvement of the present invention is: described vitrified bond is made into by the powder stock of following weight unit's:

SiO ₂45，Al ₂O ₃20，ZnO1，TiO ₂1，ZrO2，Na ₂CO ₃15，Li ₂CO ₃7，H ₃BO ₃9。

The invention still further relates to a kind of preparation method of ceramic base diamond grinding block vitrified bond, comprise the steps:

A. compounding raw material: take each raw material by proportioning, drops in batch mixer and mixes 2 ~ 3 hours;

B. powder melting: pour the raw material mixed in glass-melting furnace melting, smelting temperature 1300 ~ 1500 DEG C, the raw material melting mixed is glass metal by smelting time 1 ~ 2 hour;

C. solution cold quenching: the glass metal after melting is poured in cold water fast, carry out cooling fast and form coarse fodder, wherein cold water temperature is 10 ~ 25 DEG C, and cool time is 30 ~ 60s;

D. coarse fodder is broken: poured into by the coarse fodder obtained in step c in disintegrating machine broken, obtain meal after crossing 30 mesh sieves;

E. fine grinding powder: the meal obtained in steps d to be poured in ball mill into ball milling 1.5 ~ 2.5 hours, add suitable quantity of water during ball milling, wear into slurry;

F. sieve: the slurry after ball milling in step e is crossed 320 mesh sieves, obtain screened stock material;

G. dry: the screened stock material sieved in step f is put into drying in oven process 2 ~ 3 hours, obtains powder;

H. sieve for two times: the powder of oven dry feeding ultrasonic wave vibratory sieve is carried out secondary and sieves, bonding agent powder can be obtained;

I. pack: vacuum packaging is carried out in the bonding agent powder pack after being sieved by step h, namely obtains bonding agent finished product.

Owing to have employed technique scheme, the technological progress acquired by the present invention is:

The vitrified bond that the present invention makes is used for the making of ceramic abrading block, good to adamantine hold to reach vitrified bond, and carborundum, Brown Alundum, diamond three coefficient of expansion coupling, the effects such as finished product sintering temperature is low.Ceramic abrading block is had advantages such as sintering temperature is low, self-sharpening good, sharpness is good, the life-span is long, low-carbon environment-friendly.

Ceramic bond agent prescription of the present invention, bistrique service life and sintering character can be improved, ensure to form good mechanical engagement to wrapped up diamond, and can at a relatively low sintering temperature, reach effective sintering in shorter sintering time, slow down the degradation trend of diamond single crystal, its ceramic constituent element can be good infiltration abrasive material, improve adamantine bonding streng.

Detailed description of the invention

Below in conjunction with specific embodiment, the present invention is described in further details.

A kind of ceramic base diamond grinding block vitrified bond, the raw material of described bonding agent is made into by the powder stock of following weight unit's: SiO ₂20 ~ 55, Al ₂o ₃5 ~ 25, ZnO0 ~ 5, TiO ₂0 ~ 5, ZrO0 ~ 7, Na ₂cO ₃10 ~ 20, Li ₂cO ₃5 ~ 15, H ₃bO ₃8 ~ 30.

Vitrified bond of the present invention be preferably: SiO ₂25 ~ 52, Al ₂o ₃5 ~ 23, ZnO0 ~ 4, TiO ₂0 ~ 3, ZrO0 ~ 5, Na ₂cO ₃11 ~ 17, Li ₂cO ₃5 ~ 13, H ₃bO ₃8 ~ 28.

More preferably SiO ₂45, Al ₂o ₃20, ZnO1, TiO ₂1, ZrO2, Na ₂cO ₃15, Li ₂cO ₃7, H ₃bO ₃9.

Adopt the vitrified bond prepared of above-mentioned raw materials, the parameter evaluating its performance mainly contains: the holding force coefficient in thermal coefficient of expansion and ceramic abrading block between ceramic matrix and diamond.

Wherein: thermal coefficient of expansion limits, when diamond thermal coefficient of expansion is 1.2 ~ 4.5 × 10 according to diamond thermal coefficient of expansion, carborundum thermal coefficient of expansion and Brown Alundum thermal coefficient of expansion ^-6/ DEG C, carborundum thermal coefficient of expansion is 4 ~ 6 × 10 ^-6/ DEG C, Brown Alundum thermal coefficient of expansion is 7 ~ 10 × 10 ^-6/ DEG C time, for making bonding agent firmly hold abrasive material, the thermal coefficient of expansion of bonding agent should be selected 4 ~ 7 × 10 ^-6/ DEG C proper.

Introduce the thermal coefficient of expansion that relative density correction model (Turner model) carrys out Accurate Prediction ceramic material.

In formula:

α ₁the thermal coefficient of expansion of-each phase (DEG C ^-1)

P ₁the mass fraction (wt%) of-each phase

K ₁the bulk modulus (Pa) of-each phase

D ₁density (the g cm of-each phase ^-3)

Hold between ceramic matrix and diamond characterizes: in Diamond Tools Industry, conventional following formula characterizes the size of carcass to diamond hold.

Q=（σ ₁-σ ₂）/σ ₁

F=1-Q

The relative value that wherein Q---bending strength declines,

σ ₁---the bending strength of carcass,

σ ₂---containing the bending strength of diamond sample,

F---diamond holding force coefficient, F value larger expression carcass is higher to adamantine hold.

The pulp furnish embodiment of several concrete vitrified bond is below provided.But raw material of the present invention can also be expanded on the basis of following examples, obtains the formula of other ratio.

Embodiment 1

The preparation method of pottery abrading block vitrified bond, comprises the steps:

A. compounding raw material: take each raw material, SiO by following unit of weight (in kilogram) proportioning ₂45Kg, Al ₂o ₃17Kg, ZnO1Kg, TiO ₂1Kg, ZrO2Kg, Na ₂cO ₃12Kg, Li ₂cO ₃9Kg, H ₃bO ₃13Kg, drops in batch mixer and mixes 2 hours;

B. powder melting: pour the raw material mixed in glass-melting furnace melting, smelting temperature 1350 DEG C, the raw material melting mixed is glass metal by smelting time 1.5 hours;

C. solution cold quenching: the glass metal after melting is poured in cold water fast, carry out cooling fast and form coarse fodder, wherein cold water temperature is 20 DEG C, and cool time is 30s;

D. coarse fodder is broken: poured into by the coarse fodder obtained in step c in disintegrating machine broken, obtain meal after crossing 30 mesh sieves;

E. fine grinding powder: the meal obtained in steps d to be poured in ball mill into ball milling 2 hours, add suitable quantity of water during ball milling, wear into slurry;

F. sieve: the slurry after ball milling in step e is crossed 320 mesh sieves, obtain screened stock material;

G. dry: the screened stock material sieved in step f is put into drying in oven process 2 hours, obtains powder;

H. sieve for two times: the powder of oven dry was sent into ultrasonic wave vibratory sieve and carry out secondary and sieve, bonding agent powder can be obtained;

I. pack: vacuum packaging is carried out in the bonding agent powder pack after being sieved by step h, namely obtains bonding agent finished product.

The thermal coefficient of expansion of gained vitrified bond is 5.7 × 10 ^-6/ DEG C, diamond holding force coefficient is 85%.

The concrete steps of embodiment 2 ~ 9 are with reference to shown in embodiment 1, and pulp furnish, preparation process parameter and properties of product correspondence are listed in table one.

Table one embodiment 2 ~ 9 Raw proportioning, preparation process parameter and properties of product

As can be seen from table one, the vitrified bond that Ceramic bond agent prescription of the present invention is prepared, all has good thermal coefficient of expansion and larger diamond holding force coefficient.