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Black high-strength microcrystalline glass and its preparation method

A glass-ceramic and high-strength technology, which is applied in the field of black high-strength glass-ceramic and its preparation, can solve the problems of high toxicity, color cast, price change of coloring ions, etc., and achieve excellent heat resistance and corrosion resistance, low thermal expansion coefficient, and high mechanical strength. The effect of intensity

Inactive Publication Date: 2007-07-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, CN 1785872A also has the following disadvantages: 1) the composition of the coloring agent is complex, and the composition is not easy to match, resulting in color cast; 2) CeO in the coloring composition 2 3) the crystal nucleating agent component ZrO 2 in no P 2 o 5 The solubility is low under the conditions, which affects the crystallization effect; 4) It does not involve the mechanical properties of glass ceramics
[0005] CN1699233 also reported that NiO, V 2 o 5 and Fe 2 o 3 A black transparent glass-ceramic as a coloring agent and the production method of its products are used to prepare glass-ceramic products such as induction cooker plates, plates, microwave oven plates, etc., but CN1699233 has the following disadvantages: 1) It does not involve glass atmosphere control and coloring ions Variation; 2) V 2 o 5 V 3+ The ions are green and not easy to match with Ni and Fe ions

Method used

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  • Black high-strength microcrystalline glass and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: a kind of black high-strength glass-ceramic, its weight percentage is composed of:

[0021] SiO 2 70%, LiO 2 3.5%, Al 2 o 3 17%, Fe 2 o 3 0.3%, Co 2 o 3 0.9%, Ni 2 o 3 0.6%, TiO 2 2%, ZrO 2 1%, P 2 o 5 0.4%, MgO 0.5%, ZnO 0.5%, BaO 0.2%, B 2 o 3 0.1%, K 2 O 1.0%, Na 2 O 1.0%, As 2 o 3 0.5%, Sb 2 o 3 0.5%.

[0022] Grind the above glass-ceramic components evenly and then add a reducing agent to form a mixture. The weight of the reducing agent is 5% of the total weight of the glass-ceramic components. The reducing agent is a commercially available product, such as carbon powder. The mixture is melted at 1600°C, shaped, and annealed; then nucleated at 600-800°C for 2 hours, and then heated to 800°C for 12 hours of crystallization treatment. The flexural strength is 110-150MPa, and the thermal expansion coefficient is 5-21×10 -7 / °C, black, stable and uniform glass-ceramic, the spherical grain size is between 30 and 40nm, as s...

Embodiment 2

[0023] Embodiment 2: a kind of black high-strength glass-ceramic, its weight percentage is composed of:

[0024] SiO 2 70%, LiO 2 3.5%, Al 2 o3 17%, Fe 2 o 3 0.3%, Co 2 o 3 0.7%, Ni 2 o 3 0.8%, TiO 2 2%, ZrO 2 1%, P 2 o 5 0.4%, MgO 0.5%, ZnO 0.5%, BaO 0.2%, B 2 o 3 0.1%, K 2 O 1%, Na 2 O 1%, As 2 o 3 0.4%, Sb 2 o 3 0.6%.

[0025] Grind the above glass-ceramic components uniformly and then add a reducing agent to form a mixture. The weight of the reducing agent is 10% of the total weight of the glass-ceramic components. The reducing agent is a commercially available product, such as carbon powder. The mixture was melted at 1580°C, shaped and annealed; then nucleated at 700°C for 4 hours, and then heated to 1000°C for 2 hours of crystallization treatment. The flexural strength is 110-150MPa, and the thermal expansion coefficient is 5-10×10 -7 / °C, black, stable and uniform glass-ceramics, the spherical grain size is between 30 and 40nm, as shown ...

Embodiment 3

[0026] Embodiment 3: a kind of black high-strength glass-ceramic, its weight percentage is composed of:

[0027] SiO 2 70%, LiO 2 3.5%, Al 2 o 3 17%, Fe 2 o 3 0.5%, Co 2 o 3 0.5%, Ni 2 o 3 1%, TiO 2 3.2%, MgO 0.7%, ZnO 0.5%, K 2 O 2.1%, Sb 2 o 3 1%.

[0028] Grind the above glass-ceramic components uniformly and then add a reducing agent to form a mixture. The weight of the reducing agent is 8% of the total weight of the glass-ceramic components; the reducing agent is a commercially available product, such as carbon powder. The mixture is melted at 1630°C, shaped and annealed; then nucleated at 600-800°C for 1 hour, and then heated to 700°C for 6 hours of crystallization treatment. The flexural strength is 110-150MPa, and the thermal expansion coefficient is 5-10×10 -7 / °C, black stable and uniform glass-ceramics, spherical grain size between 30-40nm.

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Abstract

The invention discloses a black high-strength microcrystal glass, which comprises the following parts: 70% SiO2, 3. 5% Lithia, 17% alumina, 0.1%-0.5% ferric trioxide, 0.5%- 1% cobalt trioxide, 0.5%-1% nickel trioxide, 3. 1% -3. 5% at least one of titania, zirconia and phosphorus pentoxide, 1%-1. 5% at least one of magnesia, zinc oxide, barium oxide and boric oxide, 2. 0%-2. 1% potassium oxide and or sodium oxide and 1% arsenic oxide and or antimony oxide. The making method of microcrystal glass comprises the following steps: grinding evenly; adding reducer to allocate composite material; fusing under 1580 -1650 deg. c; shaping; annealing; coring under 600-800 deg. c for 1-4h; heating to 700-1000 deg. c to crystallize for 1-12h.

Description

technical field [0001] The invention relates to a black high-strength glass-ceramic and a preparation method thereof. Background technique [0002] Glass-ceramics is a polycrystalline composite material obtained by controlling the crystallization of basic glass composed of specific components at a certain temperature; among them, lithium aluminum silicon (Li 2 O-Al 2 o 3 -SiO 2 , referred to as LAS) glass-ceramics as an important variety of glass-ceramics, because of its ultra-low expansion, high strength, high temperature resistance, thermal shock resistance, and is widely used in the manufacture of astronomical telescopes, cooking utensils, tableware, high temperature electric light source Glass, induction cooker panels, substrates for microelectronics technology, heating appliances for laboratories, high-temperature heat exchangers, substitute quartz glass, high-temperature windows, radar radomes, etc. Black glass-ceramic is made of glass-ceramic as the matrix and mix...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/14C03C4/02C03B32/02C03C3/083
CPCC03C10/00C03C3/085C03C3/083C03C4/02C03C3/093C03C3/097C03C3/089C03C3/091
Inventor 郭兴忠陈明形杨辉李海淼项延杭
Owner ZHEJIANG UNIV
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