New phosphate binding compositions (PBC)
PBC consists of a binder and a filler, which are mixed in certain ratios immediately before the manufacture of the materials. As a binder one may use phosphoric acid, aluminum-phosphate solutions
modified with various additives. As a filler, oxides of aluminum, chromium, iron, titanium, zirconium, aluminum and zirconium silicates, natural minerals, waste products are well used. The degree of
wastes using can reach more than 50 % of the weight of new materials.
After the molding of products (workpiece) or the application of compositions (as coatings, paints, etc.), the formulations are cured at room temperature (during from several hours to several days) and, if necessary, heat treatment of the product up to 50–300 °C is allowed.
Specific application area of the materials, conditions of their use, and attaining definite physical, chemical and mechanical characteristics are determined by the compositions and proportions of the main components: the binder and the filler. Thus, depending on the filler, formulations may perform as radio-transparent or radio-absorbing materials, electroconductors or dielectrics, thermal-conducting or thermal-insulating materials, as well as materials for ionizing radiation protection.
Advantages. The developed materials are non-combustive, nontoxic, and environmentally friendly. Their manufacture is waste-free and does not need any complicated equipments (it can be organized at any building industry enterprise).
Available application areas: aviation and space industry, metallurgy, ceramics industry, production of glass, refractories and building materials.
Using of PBC allowed to create a wide range of thermostable materials with broad operating temperatures up to 1700 ºС:
1. Adhesive compositions for gluing of metals, ceramics, glass, wood and graphite with the following characteristics:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature 1700 ºС;
• Shear strength – up to 20 МPа.
2. Composite materials, including textolites based on quartz and carbon fabric (cloth):
• Hardening temperature 20–200 ºС;
• Maximal operation temperature 1000 ºС;
• Ultimate compression strength – more than 100 МPа;
• Ultimate flexural strength – more than 100 МPа;
• Density 1.5–2.5 g/сm3.
3. Fireproof materials including brick-linings, concretes, mortars:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature 1700 ºС;
• Ultimate compression strength – more than 200 МPа.
These materials were successfully used for lining of melting furnaces and casting ladles for foundry iron at “Heating equipment plant, Minsk, Belarus.
4. Heat-insulating and fire-proof materials:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature 1100 ºС;
• Ultimate compression strength 0.5–2.0 МPа;
• Density 0.3–0.8 g/сm3;
• Thermal conductivity coefficient 0,1–0,8 W/m•К
5. Compounded materials:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature 1600 ºС;
• Specific electric resistance (at 20 ºС) 108–1012 Оm•m;
• Electric strength 1,5–3 kV/mm.
6. Electroconductive materials containing carbon nanotubes (2–5 wt. %):
• Hardening temperature 20–200 ºС;
• Maximal operation temperature 600 ºС;
• Specific electric conductivity 10 S/m (or 10 Оhm1•m1);
Such materials can be used to protect against electromagnetic radiation.
7. Neutron-absorbing materials containing boron in amounts up to 90 wt. %:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature – up to 1000 ºС;
• Ultimate compression strength – up to 300 МPа;
• Density 1.5–2.5 g/сm3.
8. Coatings and paints with thermoresistant pigments:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature – up to 1600 ºС.
9. Unfired ceramics:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature – up to 1300 ºС;
• Ultimate compression strength – up to 200 МPа.
During the last fifteen years 13 research contracts supported by P.R. China, Republic of India and Republic of Korea have been successfully carried out.
After the molding of products (workpiece) or the application of compositions (as coatings, paints, etc.), the formulations are cured at room temperature (during from several hours to several days) and, if necessary, heat treatment of the product up to 50–300 °C is allowed.
Specific application area of the materials, conditions of their use, and attaining definite physical, chemical and mechanical characteristics are determined by the compositions and proportions of the main components: the binder and the filler. Thus, depending on the filler, formulations may perform as radio-transparent or radio-absorbing materials, electroconductors or dielectrics, thermal-conducting or thermal-insulating materials, as well as materials for ionizing radiation protection.
Advantages. The developed materials are non-combustive, nontoxic, and environmentally friendly. Their manufacture is waste-free and does not need any complicated equipments (it can be organized at any building industry enterprise).
Available application areas: aviation and space industry, metallurgy, ceramics industry, production of glass, refractories and building materials.
Using of PBC allowed to create a wide range of thermostable materials with broad operating temperatures up to 1700 ºС:
1. Adhesive compositions for gluing of metals, ceramics, glass, wood and graphite with the following characteristics:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature 1700 ºС;
• Shear strength – up to 20 МPа.
2. Composite materials, including textolites based on quartz and carbon fabric (cloth):
• Hardening temperature 20–200 ºС;
• Maximal operation temperature 1000 ºС;
• Ultimate compression strength – more than 100 МPа;
• Ultimate flexural strength – more than 100 МPа;
• Density 1.5–2.5 g/сm3.
3. Fireproof materials including brick-linings, concretes, mortars:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature 1700 ºС;
• Ultimate compression strength – more than 200 МPа.
These materials were successfully used for lining of melting furnaces and casting ladles for foundry iron at “Heating equipment plant, Minsk, Belarus.
4. Heat-insulating and fire-proof materials:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature 1100 ºС;
• Ultimate compression strength 0.5–2.0 МPа;
• Density 0.3–0.8 g/сm3;
• Thermal conductivity coefficient 0,1–0,8 W/m•К
5. Compounded materials:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature 1600 ºС;
• Specific electric resistance (at 20 ºС) 108–1012 Оm•m;
• Electric strength 1,5–3 kV/mm.
6. Electroconductive materials containing carbon nanotubes (2–5 wt. %):
• Hardening temperature 20–200 ºС;
• Maximal operation temperature 600 ºС;
• Specific electric conductivity 10 S/m (or 10 Оhm1•m1);
Such materials can be used to protect against electromagnetic radiation.
7. Neutron-absorbing materials containing boron in amounts up to 90 wt. %:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature – up to 1000 ºС;
• Ultimate compression strength – up to 300 МPа;
• Density 1.5–2.5 g/сm3.
8. Coatings and paints with thermoresistant pigments:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature – up to 1600 ºС.
9. Unfired ceramics:
• Hardening temperature 20–200 ºС;
• Maximal operation temperature – up to 1300 ºС;
• Ultimate compression strength – up to 200 МPа.
During the last fifteen years 13 research contracts supported by P.R. China, Republic of India and Republic of Korea have been successfully carried out.
