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Imitated Hetian jade white glass-ceramics suitable for casting and then CAD processing and preparation method thereof

A glass-ceramic, white technology, applied in imitation Hetian jade white glass-ceramic and its preparation field, can solve the problems such as not suitable for CAD/CAM fine processing, whiteness not achieved, transparency not achieved translucency, etc., to achieve good translucency Effects of transparency properties, high hardness and breaking strength

Inactive Publication Date: 2017-12-05
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The whiteness does not meet the requirements of Hetian Yubairu, but belongs to Qingbaiyu
[0004] (2) The gloss does not reach the grease luster but waxy
[0005] (3) Transparency is not translucent, but slightly transparent
[0006] (4) Not suitable for CAD / CAM mechanical fine processing

Method used

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  • Imitated Hetian jade white glass-ceramics suitable for casting and then CAD processing and preparation method thereof
  • Imitated Hetian jade white glass-ceramics suitable for casting and then CAD processing and preparation method thereof
  • Imitated Hetian jade white glass-ceramics suitable for casting and then CAD processing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The main crystal phase of the product is glass-ceramic of lithium metasilicate. The specific preparation steps are as follows:

[0058] 1. Design its basic chemical composition

[0059] SiO 2 : 68%, Li 2 O: 13.1%, K 2 O: 5%, Al 2 o 3 : 1.7%, P 2 o 5 : 2.6%, ZnO: 1.5%, B 2 o 3 : 1.5%, La 2 o 3 : 0.5%, CeO 2 : 1.1%, MgO: 2.5%, TiO 2 : 1%, ZrO 2 : 1.5%.

[0060] 2. Material selection

[0061] Use chemically pure or industrially pure drugs for melting, where K 2 O and P 2 o 5 Introduced using potassium phosphate, B 2 o 3 Introduced using boric acid.

[0062] 3. Ingredients

[0063] According to the above formula composition, carry out batching, accurately calculate the required ingredients and carry out batching, after batching, fully ball mill to ensure that the raw materials are mixed evenly.

[0064] 4. Pre-burning

[0065] The prepared raw materials were pre-fired in a muffle furnace at 650°C for 1 hour.

[0066] 5. Melting

[0067] After the pr...

Embodiment 2

[0076] The main crystal phase of the product is glass-ceramic of lithium metasilicate. The specific preparation steps are as follows:

[0077] 1. Design its basic chemical composition

[0078] SiO 2 : 68.44%, Li 2 O: 13.16%, K 2 O: 4%, Al 2 o 3 : 2%, P 2 o 5 : 2.4%, ZnO: 3%, B 2 o 3 : 1.5%, La 2 o 3 : 0.5%, CeO 2 : 1.5%, MgO: 1.5%, TiO 2 : 1%, ZrO 2 :1%.

[0079] 2. Material selection

[0080] Use chemically pure or industrially pure drugs for melting, where K 2 O and P 2 o 5 Introduced using potassium phosphate, B 2 o 3 Introduced using boric acid.

[0081] 3. Ingredients

[0082] According to the above formula composition, carry out batching, accurately calculate the required ingredients and carry out batching, after batching, fully ball mill to ensure that the raw materials are mixed evenly.

[0083] 4. Pre-burning

[0084] The prepared raw materials were pre-fired in a muffle furnace at 650°C for 1 hour.

[0085] 5. Melting

[0086] After the pre-f...

Embodiment 3

[0095] The main crystal phase of the product is glass-ceramic of lithium metasilicate. The specific preparation steps are as follows:

[0096] 1. Design its basic chemical composition

[0097] SiO 2 : 68.4%, Li 2 O: 13.1%, K2 O: 3%, Al 2 o 3 : 2%, P 2 o 5 : 3%, ZnO: 3.5%, B 2 o 3 : 1.5%, La 2 o 3 : 1%, CeO 2 : 1%, MgO: 1.5%, TiO 2 : 1.3%, ZrO 2 : 0.7%.

[0098] 2. Material selection

[0099] Use chemically pure or industrially pure drugs for melting, where K 2 O and P 2 o 5 Introduced using potassium phosphate, B 2 o 3 Introduced using boric acid.

[0100] 3. Ingredients

[0101] According to the above formula composition, carry out batching, accurately calculate the required ingredients and carry out batching, after batching, fully ball mill to ensure that the raw materials are mixed evenly.

[0102] 4. Pre-burning

[0103] The prepared raw materials were pre-fired in a muffle furnace at 650°C for 1 hour.

[0104] 5. Melting

[0105] After the pre-fire...

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Abstract

The invention relates to imitated Hetian jade white glass-ceramics suitable for casting and then CAD processing and a preparation method thereof and belongs to the field of glass-ceramics. The imitated Hetian jade white glass-ceramics comprise, by mass, 60-75% of SiO2, 0.5-7% of Al2O3, 0.5-8% of P2O5, 8-20% of Li2O, 1-8% of K2O, 0-5% of B2O3, a stabilizer and an additive, wherein a mole ratio of SiO2 to Li2O is 1.7 to 3.0. The preparation method comprises adjusting heat treatment and temperature schedule to control a growth process of lithium disilicate grains which are rod-shaped crossed aggregates and have three-dimensional interlacing and grain interlocking structures and high hardness and breaking strength.

Description

technical field [0001] The invention relates to a Hetian jade imitation white glass-ceramic suitable for CAD processing after casting and a preparation method thereof, belonging to the field of glass-ceramics. Background technique [0002] The nephrite jade produced in Hotan, Xinjiang, China has a long history of development and is of the best quality, but at present the resources are exhausted and the price is expensive, which cannot meet the increasing demand, so glass-ceramic is used to imitate jade. The currently applied invention patent publication number CN101805128A "a jade-type glass-ceramic and its preparation method" has one or more main crystal phases of lanceolite, feldspar, nepheline, diopside and β-quartz, and also Contains one or two of wollastonite and spodumene as the secondary crystal phase. Another invention patent authorization publication number CN101698568B "A method for preparing jade-type glass-ceramics by using high-temperature slag", using molten s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03B19/02C03B25/02
CPCC03C10/0027C03B19/02C03B25/02
Inventor 刘敬肖单正杰王承遇史非汤华娟
Owner DALIAN POLYTECHNIC UNIVERSITY
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