CN1153150A

CN1153150A - Strengthened bone china

Info

Publication number: CN1153150A
Application number: CN 95112612
Authority: CN
Inventors: 胡勇波; 邱林; 卢亚非
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-29
Filing date: 1995-12-29
Publication date: 1997-07-02
Anticipated expiration: 2015-12-29
Also published as: CN1067357C

Abstract

A strengthened bone china features use of bone ash as flux, decreasement of bone ash consumption, increasement of SiO2 content and use of additional wollastonite and talc as flux assistant. The principal crystalline phase of ceramic body is alpha-cristobalite and its secondary crystalline phase is calcium phosphate, huronite and wollastonite. Said china has the advantages of high mechanical strength, thermal stability, whiteness and transparency, wide burning temp range and low cost.

Description

Strengthened bone china

The invention belongs to the ceramic technology field, relate to a kind of strengthened bone china.

Bone china is universally acknowledged a kind of high-grade porcelain, have light weight, good, the graceful pure white characteristics of light transmission, be used as high-grade vessel, artistic porcelain etc., because its used flux raw material mainly adopts bone ash, also there is following defective in existing bone china: first, mechanism's intensity is not good enough, and badly broken in the use especially can not adapt to the requirement of mechanize washing.The second, poor heat stability, the 3rd, the bone china sintering range is narrow, firing process is difficult to control, and the 4th, adopt biscuiting, glaze firing to burn till for twice more, expend the energy, the production cost height.Therefore bone china is difficult to generally be used by people as ordinary porcelain.The Chinese invention patent communique, a kind of " soft bone-ask porcelain and preparation method thereof " patent application (publication number: CN1038077A, application number: 89101452.7) were disclosed on December 13rd, 1989, its bone ash consumption is still than higher, reach 44-48%, the main purpose of this invention is to improve whiteness, transparence and the glossiness of bone china, and the ball milling method of improvement raw material, defectives such as therefore, the bone china of manufacturing by this patent application exists still that physical strength is lower, poor heat stability, firing range are narrow, burn till for twice, production cost height.

The objective of the invention is to provide that a kind of bone ash consumption is low, physical strength is high, Heat stability is good, wide, the once-firing of firing range, production cost is low, the high-quality aesthetic appearance of existing traditional china, and the long-lived strengthened bone china of super hard-paste is arranged again.

The technical scheme that realizes purpose of the present invention is:

Contain SiO in the chemical ingredients of its base substrate of this strengthened bone china ₂, P ₂O ₅, Al ₂O ₃, CaO, MgO, K ₂O, Na ₂O, the content of above-mentioned Chemical Composition in the porcelain base is (weight percent): SiO ₂60-74%, P ₂O ₅2.2-11%, Al ₂O ₃4-6%, CaO16-34%, MgO0.3-2%, K ₂O+NaO＜2%, the crystalline phase amount accounts for 55-70% (weight percent), crystal grain less than 40 μ m in the porcelain base substrate, and wherein the crystalline phase amount less than 30 μ m accounts for more than 45% of porcelain base, and main crystalline phase is a α-Fang Shiying, and paracrystalline phase is β-Ca ₃(PO ₄) ₂, lime feldspar, wollastonite, quartzy crystal grain is below 25 μ m, and the content of α-Fang Shiying accounts for the 20-40% of porcelain base, other quartzy crystal grain 5-10% (weight percents.

Form the raw mineral materials compositing range that is adopted according to the Chemical Composition of porcelain base and be (weight percent): bone ash or phosphatic rock 5-25%, wollastonite 5-15%, quartzy 30-40%, silica glass 10-20%, clay 20-25%, softening agent 1-5%, talcum 1-4%.

Bone china of the present invention, the bone ash consumption is less, and the also available phosphatic rock of bone ash substitutes, to reduce production costs, bone ash or phosphatic rock reduce the firing temperature of porcelain still as flux, talcum is as fusing assistant, and helps quartzyly to transform SiO among the present invention to α-Fang Shiying ₂The content height, mainly introduce by quartzy and fused silica powder, can significantly improve the physical strength of porcelain, in the sintering process of porcelain, improve liquid phase viscosity, favourablely overcome near bone china liquid phase eutectic point and sharply increase and cause molten phenomenon of collapsing, thereby enlarge the sintering range of porcelain, quartzy to adopt quartz micropowder, granularity be 2-6 μ m.Silica glass is because its thermal expansivity is little, and fused silica powder plays a crucial role to the thermostability that improves this porcelain because the high dispersive height is evenly distributed on and plays shock absorption in the porcelain.Wollastonite is little because of its coefficient of expansion, and the thermostability of also favourable raising porcelain is again because the wollastonite crystal is needle-like and interweaves the physical strength of favourable raising porcelain in the porcelain base.The Chemical Composition of used softening agent consists of (weight percent): SiO ₂53-61%, Al ₂O ₃11-13%, CaO1.04-3.77%, MgO3.79-5.09%, K ₂O+Na ₂O3-3.75% burns 16-18%, and its fineness is: specific surface area:＞1000tmg, the main chemical of clay consists of: SiO ₂62-68%, Al ₂O ₃17-22%, K ₂O+Na ₂O＜1.5%, burn 10-12%, clay and softening agent increase the plasticity of pug.The effective size of grain of the 90-95% of used raw mineral materials (weight percent) is less than 30 μ m, and remaining firing temperature less than 40 μ m porcelain is 1220-1300 ℃, the porcelain of once-firing in the oxydizing flame.Overcome the defective that existing bone china needs biscuiting and glaze firing to burn till for twice, the present invention has saved the energy to the direct glazing once-firing of dry body.

Because in the strengthened bone china base of the present invention, the specific refractory power of α-Fang Shiying is 1.56 in the crystalline phase, the calcium phosphate specific refractory power is 1.59, lime feldspar specific refractory power 1.58, wollastonite specific refractory power are 1.58, the glassy phase specific refractory power is 1.56, and the specific refractory power of these thing phases is all very approaching, so good transmittance.

After tested, reinforcement china of the present invention, thermostability: 180 ℃-20 ℃ do not split resistance to impact shock: 2-31/mm ², folding strength＞1500/mm ²Whiteness:＞75 °, transparence 〉=45%.These technical indicators are better than existing bone china.

Embodiment 1:

Batching: bone ash 20%, wollastonite 8%, softening agent 5%, Jiepai clay 25%, micro mist quartz 30%, silica glass 10%, talcum 2% (weight percent).Bone ash adopts the material after the ox bone calcining.

To admixtion ball milling, refining mud, moulding, glazing, under 1220 ℃ of-1280 ℃ of temperature, burn till in the oxydizing flame, just can obtain the strengthened bone china of pure white light, porcelain exquisiteness, intensity height, Heat stability is good.

Embodiment 2:

Batching: bone ash 15%, wollastonite 5%, softening agent 5%, Jiepai clay 25%, micro mist quartz 30%, silica glass 17%, talcum 3% (weight percent).

Press the technological process described in the embodiment 1,1240 ℃-1290 ℃ of firing temperatures.

Embodiment 3:

Batching: bone ash 10%, wollastonite 10%, softening agent 3%, Jiepai clay 23%, micro mist quartz 35%, silica glass 15%, talcum 4%.

Press the technological process of embodiment 1,1250 ℃-1300 ℃ of firing temperatures.

Claims

1, a kind of strengthened bone china contains SiO in the Chemical Composition of its base substrate ₂, P ₂O ₅, N ₂O ₃, CaO, MgO, K ₂O, Na ₂O is characterized in that the content of above-mentioned Chemical Composition in the porcelain base is (weight percent): SiO ₂60-74%, P ₂O ₅2.2-11%, Al ₂O ₃4-6%, CaO16-34%, MgO0.3-2%, K ₂O+Na ₂O＜2%, the crystalline phase amount accounts for 55-70% (weight percent) crystal grain less than 40 μ m in the porcelain base substrate, and wherein the crystalline phase amount less than 30 μ m accounts for more than 45% of porcelain base, and main crystalline phase is a α-Fang Shiying, and paracrystalline phase is β-Ca ₃(PO ₄O) ₂, lime feldspar, wollastonite, quartzy crystal grain is below 25 μ m, the content of α-Fang Shiying accounts for the 20-40% of porcelain base, other quartzy grains constitute 5-10% (weight percent).

2, strengthened bone china according to claim 1 is characterized in that forming the raw mineral materials compositing range that is adopted according to the Chemical Composition of porcelain base is (weight percent): bone ash or phosphatic rock 5-25%, wollastonite 5-15%, quartzy 30-40%, silica glass 10-20%, clay 20-25%, softening agent 1-5%, talcum 1-4%.

3, strengthened bone china according to claim 2, the effective size of grain of 90-95% (weight percent) that it is characterized in that the used raw mineral materials of this porcelain is less than 30 μ m, quartzy particle diameter 2-6 μ m, and remaining is less than 40 μ m, the firing temperature of porcelain is 1220 ℃-1300 ℃, the porcelain that burns till in the oxydizing flame.