CN102167499A

CN102167499A - Manufacturing method of quartz ceramic container

Info

Publication number: CN102167499A
Application number: CN 201110003796
Authority: CN
Inventors: 冷小威; 王璐; 唐倩; 周佟
Original assignee: Saint Gobain Quartz Jinzhou Co Ltd
Current assignee: Saint Gobain Quartz Jinzhou Co Ltd
Priority date: 2011-01-10
Filing date: 2011-01-10
Publication date: 2011-08-31
Anticipated expiration: 2031-01-10
Also published as: CN102167499B

Abstract

The invention relates to a manufacturing method of a quartz ceramic container, which comprises the following steps: selecting fused quartz particles, wherein the particle size distribution is as follows: D10 ranges from 1.5mu m to 3mu m, D50 ranges from 7mu m to 12mu m, and D90 ranges from 35mu m to 45mu m; and the chemical purity requirements are as follows: the SiO2 content is more than 99.8%, the Al content is less than 700ppm, and the Na content is less than 20ppm. The manufacturing method comprises the following steps: preparing pulp, wherein the pH value is 4-6; molding with a plaster mold; demolding, and then drying; sintering in a gas furnace, wherein the sintering temperature ranges from room temperature to 1180 DEG C, and the sintering time is 70-100 minutes; preserving the temperature at 1180-1200 DEG C for 10-30 minutes; heating to 1400 DEG C for 50-70 minutes; cutting, and grinding; and pickling with HF, cleaning with de-ionized water, and drying to obtain the finished product. The molding method is simple, and the maximum sintering temperature is 1400 DEG C due to the adoption of the fine particle formula. Thus, the container can achieve a high density of 2.15-2.18g/cm<3>, has a smooth surface and a glaze effect, can be circularly used 5-10 times at high temperature (1000-1300 DEG C) and has the advantages of no deformation and good thermal shock resistance. The method can be used for manufacturing quartz ceramic containers of which the upper edge is within 400mm and the height is within 200mm.

Description

A kind of making method of quartz-ceramics container

Technical field

The present invention relates to a kind of making method of quartz-ceramics container.

Background technology

Fused quartz ceramic is also referred to as quartz-ceramics, succeed in developing and realized industrialization in the sixties in 20th century by the georgia ,u.s.a Institute of Technology the earliest in 1963, be a kind of be raw material with fused quartz or silica glass, the sintered compact of making through technology such as pulverizing, moulding, sintering.A series of excellent properties such as fused quartz ceramic has Heat stability is good, thermal expansivity is little, specific inductivity is low, acid-alkali-corrosive-resisting is good, electrical insulating property is good, cost is low, so since coming out, under refractory materials and moderate temperature, resist rapidly in the fierce structural material applications that changes of temperature and obtained popularization, its Application Areas is just by enlarging, having related to numerous areas such as comprising spaceship, rocket, guided missile, radar, iron and steel, metallurgy, glass, is a kind of up-and-coming stupalith.

Mostly the quartz-ceramics product of Zhi Zuoing was to form at 1200 ℃ of left and right sides sintering with resistance furnace in the past, and its density is 1.8～1.9g/cm ³, the agglomerating product can shrink when at high temperature (1000 ℃～1300 ℃) use once more at low temperatures, breaks after recycling 2～3 times, causes danger.

Summary of the invention

It is simple that the technical problem to be solved in the present invention provides a kind of forming method, density can reach 2.15-2.18, and smooth surface presents the glaze effect, at high temperature (1000 ℃-1300 ℃) recycle 5-10 time, and the making method of indeformable quartz-ceramics container.

The making method of this quartz-ceramics container is as follows:

1, chooses raw material

The fused quartz particle, its size distribution:

D10: 1.5～3 μ m; D50 is 7～12 μ m; D90:35～45 μ m;

Fused quartz particulate chemical purity requires:

The content of SiO2＞99.8%, content＜700ppm of Al, content＜20ppm of Na;

2, slurry preparation

Prepare slurry, pH value=4-6 according to weight ratio fused quartz particle 75%-85%, water 15%-25%;

3, moulding

Adopt gypsum mold to carry out moulding;

4, drying

After the demoulding,, dry directly into baking oven;

5, sintering

Carry out sintering with steam stove, its sintering process is as follows:

Room temperature～1180 ℃ 70～100 minutes

1180 ℃～1200 ℃ are incubated 10～30 minutes

Be warming up to 1400 ℃ 50～70 minutes

6, cutting and grinding

Behind the sintering sinter is cut and ground finish by product size;

7, HF pickling and washed with de-ionized water

Ground and carried out pickling, adopting massfraction during pickling is that 5%～8%HF acid solution soaks, and cleans with deionized water then, is finished product after the oven dry.

The making method of above-mentioned quartz-ceramics container is dried by the fire down more than 48 hours at 30 ℃～50 ℃ during oven dry, up to oven dry fully.

The invention has the beneficial effects as follows: forming method is simple, adopts the fine particle prescription, and the highest sintering temperature is 1400 ℃, therefore can obtain high-density 2.15～2.18 g/cm ³, smooth surface presents the glaze effect, at high temperature (1000 ℃～1300 ℃) recycle 5～10 times, and indeformable (only can with in various degree crystallization until breaking), good thermal shock, can be used for making 400mm suitable for reading with interior, height 200mm with interior quartz-ceramics container.

Embodiment:

Below for being used for describing embodiments of the invention, unless but indicate in addition in the claims, this does not also mean that limitation of the present invention.

Embodiment 1

1, chooses raw material

Fused quartz particle size distribution test result be (unit: μ m):

SiO2 content 99.83% in the raw material, the impurity chemical purity is analyzed as follows in the raw material: (unit: ppm)

2, slurry preparation

The slurry of configuration 60kg, its prescription is as follows:

Fused quartz particle 45kg, deionized water 15kg mix back preparation slurry, pH value=4.24.

3, moulding

Adopt the quartz-ceramics container of 5 11 cun of gypsum mold cast.

4, drying

Directly enter baking oven after the demoulding, carry out drying by following drying process, until drying fully:

5, sintering

As sintering gas, carry out sintering with propane by following sintering process:

Room temperature-1180 ℃ 70 minutes;

1180 ℃ of constant temperature 30 minutes;

Be warming up to 1400 ℃ 70 minutes.

6, cutting, grinding

Behind the sintering sinter is cut and ground finish by product size.

7, with HF acid soak and deionized water rinsing

Adopting massfraction during pickling is that 5% HF acid solution soaked 5 minutes, cleans with deionized water then, is finished product after the oven dry, sintering presents glaze glossy phenomenon, flawless, nothing distortion after testing, mean density: 2.176, (1200 ℃) can be recycled 10 times under the high temperature.

Embodiment 2

1, chooses raw material

Fused quartz particle grain size distribution test result be (unit: μ m):

SiO2 content 99.86% in the raw material, in the raw material impurity chemical purity be analyzed as follows (unit: ppm):

2, slip preparation

The slurry of configuration 60kg, it is as follows to fill a prescription:

Fused quartz particle 48kg, deionized water 12kg, pH value=5.56.

3, moulding

Adopt gypsum mold to pour into a mould 5 11 cun quartz-ceramics container respectively.

4, drying is carried out drying by following drying process, up to drying fully:

5, sintering

Room temperature～1180 ℃ 80 minutes;

1200 ℃ of constant temperature 10 minutes;

Be warming up to 1400 ℃ 65 minutes.

6, cutting, grinding

Behind the sintering sinter is processed by product size.

7, with HF acid soak and deionized water rinsing

Adopting massfraction during pickling is that 5% HF acid solution soaked 5 minutes, cleans with deionized water then, is finished product after the oven dry, sintering presents glaze glossy phenomenon, flawless, nothing distortion after testing, mean density: 2.164, (1200 ℃) can be recycled 9 times under the high temperature.

Embodiment 3

1, chooses raw material

Fused quartz particle size distribution test result be (unit: μ m):

SiO2 content 99.89% in the raw material, in the raw material impurity chemical purity be analyzed as follows (unit: ppm):

2, slurry preparation

The slurry of configuration 60kg, it is as follows to fill a prescription:

Fused quartz particle 51kg, deionized water 9kg, pH value=4.77.

3, moulding

Adopt the quartz-ceramics container of 5 11 cun of gypsum mold cast.

4, drying

Carry out drying by following drying process, until drying fully:

5, sintering

Room temperature～1180 ℃ 100 minutes;

1190 ℃ of constant temperature 15 minutes;

Be warming up to 1400 ℃ 50 minutes.

6, cutting, grinding

Behind the sintering sinter is processed by product size.

7, with HF acid soak and deionized water rinsing

Adopting massfraction during pickling is that 5% HF acid solution soaked 6 minutes, cleans with deionized water then, is finished product after the oven dry, sintering presents glaze glossy phenomenon, flawless, nothing distortion after testing, mean density: 2.157, (1200 ℃) can be recycled 9 times under the high temperature.

Claims

1. the making method of a quartz-ceramics container is characterized in that:

1), chooses raw material

The fused quartz particle, its size distribution:

D10: 1.5～3 μ m; D50 is 7～12 μ m; D90:35～45 μ m;

Fused quartz particulate chemical purity requires:

The content of SiO2＞99.8%, content＜700ppm of Al, content＜20ppm of Na;

2), slurry preparation

According to weight ratio with fused quartz particle 75%～85% and water 15%～25% mixed preparing slurry, pH value=4～6;

3), moulding

Adopt gypsum mold to carry out moulding;

4), drying

After the demoulding,, dry directly into baking oven;

5), sintering

Carry out sintering with steam stove, its sintering process is as follows:

Room temperature～1180 ℃ 70～100 minutes

1180 ℃～1200 ℃ are incubated 10～30 minutes

Be warming up to 1400 ℃ 50～70 minutes

6), cutting and grinding

Behind the sintering sinter is cut and ground finish by product size;

7), HF pickling and washed with de-ionized water

Ground and carried out pickling, the employing massfraction is 5%～8% HF acid solution immersion during pickling, cleans with deionized water then, is finished product after the oven dry.

2. according to the making method of the described quartz-ceramics container of claim 1, it is characterized in that: dry by the fire down more than 48 hours at 30 ℃～50 ℃ during oven dry, up to oven dry fully.