Aluminum Hydroxide Powder Research Articles

Recycling of aluminum dross for producing calcinated alumina by microwave plasma

Due to the excellent engineering property, aluminum has become an important material for processing industries. As the demand of aluminum increased, a large amount of waste aluminum dross has been generated during the aluminum smelting process. The aluminum dross contained aluminum nitride and would cause odor while being disposed in landfill, making the aluminum dross disposal a tough issue. Therefore, the aluminum dross was mostly stored in the original plants. The objective of this study is to develop an economically-feasible and environmentally-friendly technology to recover aluminum dross.In this study, the original aluminum dross was collected from the secondary smelting aluminum dross factories with 33.6% Al. The aluminum dross was dissolved with 3 M NaOH at 50 °C for 60 min to form NaAl(OH)4 solution. The NaAl(OH)4 was then transformed to aluminum hydroxide by adding H2SO4. Then, the aluminum hydroxide was filtered, washed, and dried. The thermogravimetric analysis and X-ray powder diffraction analysis result show that the main crystal phase of aluminum hydroxide (intermediate product) is boehmite. The aluminum hydroxide powder was calcined at 700 °C for 5 min by an atmospheric-pressure microwave plasma to produce Al2O3. The result show that this process can reduce environmental pollution and recycle aluminum as recoverable form.

Sini Decoction inhibits TLR4/NF-κB signaling pathway to improve airway remodeling of allergic asthmatic mice

This study aims to explore the effect of Sini Decoction on Toll-like receptor 4(TLR4)/nuclear factor-κB(NF-κB) signaling pathway in the mice with allergic asthma(AA). Forty-eight SPF-grade BALB/c mice were randomly assigned into a blank control group, a model group, a dexamethasone group, and high-, medium-, and low-dose Sini Decoction groups, with 8 mice in each group. The sensitization solution made of ovalbumin and aluminum hydroxide powder was injected intraperitoneally in other groups except the blank control group which was injected with an equal volume of normal saline. The solution(or normal saline) was injected three times in total with an interval of 7 days. At the same time of sensitization, external cold stimulation and ice water were administered in a 4 ℃ climate box for 20 min every day. After modeling, the mice in each group were administrated with corresponding drugs by gavage for 3 weeks. At the end of administration, pentobarbital sodium(30 mg·kg~(-1)) was used for anesthesia, and then the samples were collected for the determination of various indexes. The phenol red test was conducted to evaluate tracheal excretion function. The histopathological changes of lung tissue were observed via hematoxylin-eosin(HE) staining. Masson staining was employed to reveal the deposition of blue collagen fibers around bronchi in lung tissue and the area occupied by blue collagen fibers was calculated. Immunofluorescence method was used to measure the expression of bronchial type Ⅰ collagen(Col-Ⅰ) and α-smooth muscle actin(α-SMA). The protein and mRNA levels of TLR4, NF-κB, cysteinyl aspartate specific proteinase-1(caspase-1), and interleukin-13(IL-13) were determined by Western blot and real-time fluorescence quantitative polymerase chain reaction(real-time PCR), respectively. Compared with the model group, Sini Decoction significantly increased the phenol red excretion from trachea, lowered the lung inflammation score, reduced subepithelial collagen deposition, and decreased Col-Ⅰ and α-SMA levels. Furthermore, the decoction down-regulated the protein and mRNA levels of TLR4, NF-κB, caspase-1, and IL-13 in mouse lung tissue. In conclusion, Sini Decoction can improve air remodeling by inhibiting the TLR4/NF-κB signaling pathway.

Fabrication and characterization of Basalt/ATH/Epoxy hybrid composites

Nowadays, lightweight materials used in automobiles are composite materials reinforced with different fibres. They have better qualities, including less weight, more impact strength and resilience. In this work, hand-fabricated Epoxy hybrid composite laminates were processed using Epoxy resin as matrix and basalt fiber with a constant weight % of 1 along with aluminium hydroxide (ATH) powder of 1%, 2% and 3% (varying %) by compression molding method. To check the quality of these three hybrid composites, impact, tensile and flexural tests were conducted. From the characterization results, it was found that the weight fraction of aluminium hydroxide (ATH) powder increases (1%, 2% and 3%), and the flexural and tensile strength increases initially up to 2% of ATH reinforcement and then decreases. But, the impact strength is increased continuously with an increase in reinforcements. A scanning electron microscope (SEM) was used to examine the microstructure of the broken surface of the composites after the tensile test to understand the failure mechanisms of processed composites.

Effect and mechanism of Aluminium hydroxide and Magnesium hydroxide powder on flame suppression of flour explosion

ABSTRACT In order to systematically study the suppression effect of Aluminum hydroxide[Al(OH)3] and Magnesium hydroxide[Mg(OH)2] on the explosion of flour, Hartmann experiment system was used to carry out the explosion flame propagation experiment, and the influence of adding different proportions of Al(OH)3 and Mg(OH)2 powder on the morphology and propagation speed of flour combustion flame was studied. Combined with the thermogravimetric analysis (TG) and differential scanning calorimetry (DSC) curves of Al(OH)3 and Mg(OH)2 powder, the inhibition mechanism of Al(OH)3 and Mg(OH)2 powder on flour explosion was analyzed. The results showed that with the increase of Al(OH)3 and Mg(OH)2, the flame propagation speed gradually decreases. After adding 40%wt Mg(OH)2, when t = 182 ms, the flame reaches the top of the glass tube. When 60 wt% Mg(OH)2 and 60 wt% Al(OH)3 powder were added, the maximum flame propagation velocity of flour decreased from 13.86 m/s to 5.78 m/s and 1.62 m/s, respectively, and Al(OH)3 was superior to Mg(OH)2 in inhibiting flame propagation. Both inhibitors can inhibit flour combustion by adsorption of H and OH radicals.

Bicalutamide, an androgen receptor antagonist, effectively alleviate allergic rhinitis via suppression of PI3K–PKB activity

ObjectivesTo investigate the therapeutic effect of Bicalutamide, an androgen receptor antagonist on the onset and development of allergic rhinitis in an animal model.Methods40 male BALB/c mice were randomly divided into five groups (eight mice per group). Aluminum hydroxide powder was used as an adjuvant, combined with Ovalbumin (OVA) to establish the mouse model of allergic rhinitis via ultrasonic nebulization of OVA to stimulate the nasal cavity. Mice in Bica#1 group were intraperitoneally injected with 0.02 mg Bicalutamide/0.5 ml of normal saline daily for 7 consecutive days; mice in Bica#2 group were administered 0.02 mg Bicalutamide/0.5 ml of normal saline via intraperitoneal injection for 5 consecutive days, and then the same amount of normal saline was injected intraperitoneally for 2 consecutive days. Enzyme-linked immunosorbent assay was adopted to detect the serological levels of IgE, IL-4, and IL-6 production. Eosinophil infiltration was observed under microscope after hematoxylin and eosin staining of nasal mucosa. Quantitative PCR and Western blot were employed for determination of histamine receptors mRNA expression and PI3K/PKB associated protein levels, respectively.ResultsHistological analysis shown that allergic lesion was induced after OVA sensitization. Intraperitoneal injection with 0.02 mg Bicalutamide daily for 7 consecutive days significantly reduced the allergic lesion; however, mice injected with the same amount of normal saline at the same time demonstrated no allergic rhinitis symptoms. In addition, there was a significant reduction in eosinophils number in Bicalutamide treated mice (n = 8) compared to the OVA group (n = 8) (OVA: 19.6 ± 5.3 vs. Bica#1: 7.7 ± 0.8 vs. Bica#2: 9.4 ± 1.2, both p < 0.01). Furthermore, ELISA results revealed that the serological levels of IgE (OVA: 17.3 ± 1.7 µg/ml vs. Bica#1: 9.2 ± 0.6 vs. Bica#2: 10.4 ± 2.3, both p < 0.05), IL-4 (OVA: 164.3 ± 5.1 pg/ml vs. Bica#1: 110.2 ± 3.1 vs. Bica#2: 115.3 ± 4.1, both p < 0.05) and IL-6 (OVA: 167.3 ± 3.7 pg/ml vs. Bica#1: 117.5 ± 6.5 vs. Bica#2: 114.8 ± 2.4, both p < 0.05) were significantly decreased after two different dosage of Bicalutamide treatment. Similarly, histamine receptors in mast cells were significantly reduced after two different dosage of Bicalutamide treatment. More importantly, p-PKB protein was notably reduced after two different dosage of Bicalutamide treatment compared to the OVA group, mTOR protein levels were also down regulated after two different dosage of Bicalutamide treatment.ConclusionsOur data demonstrated that androgen receptor antagonist Bicalutamide can significantly alleviate allergic rhinitis lesion in the animal model. PI3K/PKB activity in mast cells was suppressed after Bicalutamide injection. Our results provide important implication in allergic rhinitis prevention and treatment.

Investigation of the Tracking and Erosion Resistance of a Ceramifiable Filler System for Silicone Rubber Composites

Improving the tracking and erosion resistance of silicone rubber (SiR) is of great significance to outdoor SiR insulators. In this work, a feasible method to enhance the antitracking performance of SiR by a ceramifiable system is investigated. Through scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), and other characterization methods, the mechanism that aluminum hydroxide (ATH) and low-melting glass (LMG) powder synergistically improve the tracking resistance of SiR is proposed. In this ceramifiable system, ATH plays a role in absorbing heat and serves as a precursor under the synergy with LMG, which promotes the formulation of dense mullite ceramic layer on the surface of SiR at the high temperature generated by dry band arc discharges, thereby the internal SiR is protected from degradation. Hydrophobicity and mechanical properties of ATH/LMG/SiR composites are also investigated, revealing that ATH/LMG improves the mechanical properties and hydrophobicity compared with one filler filled with the same amount. The ceramifiable system exhibits a good effect that the antitracking performance, mechanical properties, and hydrophobicity of SiR composites are improved at the same time. This system provides a new method for the research of antitracking SiR materials applied in outdoor SiR insulators.

A novel green process for the synthesis of high-whiteness and ultrafine aluminum hydroxide powder from secondary aluminum dross

Secondary aluminum dross (SAD) is a dangerous pollutant as well as a valuable resource. About 95% SAD is disposed by stockpiling on the spot due to its complex composition and technical limitations, causing severe ecological damage and public health threat. A novel green process was developed herein for the preparation of high-whiteness and ultrafine Al(OH) 3 from SAD. The SAD mixed with Na 2 CO 3 and CaO was dry molded and roasted, then the Al and Na elements were efficiently extracted to produce a high-value product. The phase transition path and toxic element transfer behavior of the roasting and leaching processes were investigated by thermodynamic analysis, X-ray diffraction analysis, X-ray fluorescence spectroscopy, scanning electron microscopy, and chemical analysis. The recovery of Al and Na reached 95.12% and 97.33%, respectively, under the optimum conditions (roasting temperature of 1150 °C, Na 2 CO 3 /SAD mass ratio of 80%, CaO/SAD mass ratio of 24%, and roasting time of 1 h). The removal rates of Cl, N, and soluble F in the roasting product were 95.38%, 98.68%, and 98.57%, respectively. The test results showed a purity of 99.17%, a whiteness of 98.1 and an average volume particle size D(4, 3) of 2.053 μm for the prepared high-whiteness and ultrafine Al(OH) 3 powder with uniform powder morphology. A cost analysis based on laboratory-scale data and market price indicates that a net profit of $431.6 can be obtained by recycling one ton SAD. The detoxification of SAD and the valuable Al element extraction can be achieved effectively by the green process. • A green and economic process for recycling secondary aluminum dross is proposed. • Dry molded roasting achieves both detoxification and recycling of aluminum dross. • Various factors affecting Al and Na recovery are evaluated and optimized. • Migration behavior of toxic elements in roasting process is investigated. • High-whiteness and ultrafine Al(OH) 3 product shows excellent physical properties.

Термическое разложение химически осажденного нанопорошка гидроксида алюминия

In this study, the phase formation of aluminum oxide nanopowder during thermal heating of chemically precipitated aluminum hydroxide was discussed. Nanopowders of aluminum oxide and hydroxide were characterized by X-ray diffraction and thermogravimetric analysis, electron microscopy, energy dispersive X-ray spectroscopy analysis. XRD analysis detected a complex phase composition consisting of different modifications of aluminum hydroxide. It was shown that the precipitated aluminum hydroxide has a flake morphology with an average particle diameter of 5.5 nm. The differential thermal analysis showed that as-deposited aluminum hydroxide undergoes a multiple stage phase transformation. The deconvolution of the experimental differential curve by the Gaussian function and comparison of the temperature intervals of mass change with the literature data revealed that the precipitated aluminum hydroxide powder consists of bayerite α-Al(OH)3 and aluminum oxyhydroxide AlOH. It was found that bayerite is transformed to boehmite in the temperature range of 100 – 400 °C. After that γ-Аl2O3 is formed during the thermal decomposition of boehmite in the temperature range of 400 – 530 °C. The second hydroxide phase formed during the chemically precipitated method has a single stage phase transformation from AlO(OH) to γ-Аl2O3 in the temperature range of 260 – 500 °C. The nanopowder of γ-Аl2O3 formed at the temperature of higher than 600 °C has an equiaxed particle shape and an average size of 7 nm.

Improved hydrogen generation from Al/water reaction using different synthesized Al( OH ) 3 catalyst crystalline phases

The catalytic influence of different crystalline phases of aluminum hydroxide nanoparticles for the hydrogen generation from the reaction of Al and water is described. In this study, different aluminum hydroxide powder crystalline phases (mixed-phase, bayerite phase, gibbsite phase), (Al(OH)3), were distinctly prepared using precipitation methods in different solvents (methanol, ethanol, and HNO3) at room temperature (25°C). Interestingly, the materials synthesized using ethanol and HNO3 showed bayerite. Using methanol as the solvent showed a gibbsite phase confirmed by X-ray diffraction, XPS, Raman spectroscopy, and field emission spectroscopy (FESEM). Hydrogen generation using small crystal sized bayerite phase and mixed-phase show higher catalytic efficiency than the pure and large gibbsite phase powders and the catalytic effect of different crystalline Al(OH)3 catalysts in the order of mixed phase>bayerite phase>gibbsite phase. The bayerite phase catalyst displayed the highest yield (100%) within 2 hours, but the gibbsite phase showed around 60% to 70% yield for a long time of 15 hours. However, more gibbsite phase-orientation would have strong catalytic power when it is small and plate-like thin layer (S.No.4, mixed phases). ~100% yield of hydrogen can be produced from 1 g Al/100 g water system within ~40 minutes using 1 g synthesized Al(OH)3 (S.No.4). This work delivers a novel technique to generate hydrogen for movable devices.

Development of a technology for the production of high-purity Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; powders based on raw materials from the Ural region

This article is devoted to the integrated use of technogenic and natural aluminous raw materials in order to extract valuable components while solving environmental problems. The analysis of the granulation process of kaolin in the Ural region with the addition of an aqueous solution of sulfuric acid and subsequent firing of granules is carried out. Sulfuric acid leaching of kaolin-containing raw materials at various acid concentrations and the duration of the precipitate was considered. The obtained aluminum hydroxide powders were certified.

Development of the Technology for Producing High-Purity Al2O3 Powders Based on Raw Materials from the Ural Region

The paper discusses the multipurpose use of technogenic and natural raw aluminous materials for extracting valuable components, while solving environmental issues. The authors analyzed the process of granulating kaolin, obtained from the Ural region, which involves the addition of aqueous sulfuric acid solution and subsequent firing of the granules. Sulfuric-acid leaching of kaolin-containing raw materials at various acid concentrations and precipitate production times was considered. A certification of the obtained aluminum hydroxide powders was performed.

Full factor plan application to polymer composites hardness investigation

Polymer composites have become widespread in many fields of technology. The article considers the creation of a mathematical model for predicting the hardness of dispersed-filled polymer composite materials based on silicone rubbers of synthetic heat resistant low molecular weight rubber A type with fine aluminium hydroxide powder addition. A full factor experiment was chosen as a test method. The main statistical criteria were checked, the reproducibility of the experiments and the adequacy of the obtained model were shown.

ОЦЕНКА РИСКОВ ПРИ ОПТИМИЗАЦИИ СОСТАВА РАДИОПОГЛОЩАЮЩИХ ДИСПЕРСНО-НАПОЛНЕННЫХ ПОЛИМЕРНЫХ КОМПОЗИЦИОННЫХ МАТЕРИАЛОВ

The problem of improving the quality of protection against electromagnetic radiation of electronic control units of aircraft is inextricably linked with the level of used materials, which is determined by their functional properties. Such materials can be radio-absorbing dispersed filled polymer composite materials (RADFPCM), to reduce the cost of creating which is relevant to develop a system for predicting the quality of RADFPCM. The subject of the research is RADFPCM. The purpose of the present research is to develop an algorithm for selecting the optimal composition of RADFPCM. The methodology for conducting the study includes theories of multi-criteria optimization and decision-making. To confirm the basic provisions of the developed algorithm for selecting the optimal composition of RADFPCM, studies were carried out on the example of a polymer composite material based on the rubber of the type SKTN grade A, powder fillers of two types and a PMS-50 (silicone fluid) additive. It is as a result established that for receiving the new filled polymer composite material which is radio-absorbing disperse filled with the value of Shore hard ness of 88.88 conventional units, the tensile strength of 91,9·104 Pa, tensile elongation of 54.42% the following structure of components is necessary: silicone SKTN grade A rubber (matrix) — 25%, iron ox ide (powder filler) — 38%, aluminum hydroxide (powder filler) — 37%, additive PMS-50–0. The proposed algorithm of selection of the optimal composition of RADFPCM can be applied in the creation of new functional materials for the aerospace industry. The developed algorithm contains a risk assessment unit according to Savage's criterion, which reduces the risk of approval of the non-optimal composition of the polymer composite material. Thus, even at the stage of computer modeling, a decision can be made on the composition of a new functional material, which reduces the cost of its creation and allows to ensure the required quality, reliability, and safety of the products for which the created materials are intended.

ИЗУЧЕНИЕ СВОЙСТВ ПОРОШКА ГИДРОКСИДА АЛЮМИНИЯ, ПОЛУЧЕННОГО ХИМИЧЕСКИМ ДИСПЕРГИРОВАНИЕМ ИЗ ОТХОДОВ СПЛАВА В95

There is considered a possibility to obtain a new ceramic material of alloy V95 by means of chemical dispersion of chips and sintering aluminum hydroxide powder obtained. The rheological properties of the powder obtained are analyzed, with the aid of laser analyzer there is defined an average particles size and their specific surface, the X-ray phase analysis is carried out.

Physicochemical and Catalytic Properties of Ni,H/ZSM-5 and Ni,H/ZSM-5–Binder Catalysts Prepared in the Absence and in the Presence of Binder

Physicochemical and catalytic properties of H/ZSM-5 and Ni,H/ZSM-5 along with Ni,H/ZSM-5–Al2O3 (1 : 1) systems were examined. The systems with a binder were prepared by two different methods of mixing zeolite with aluminum hydroxide. The samples were characterized by N2 sorption (at 77 K), X-ray diffraction, 27Al magic-angle spinning (MAS) NMR spectroscopy, temperature-programmed desorption of ammonia and adsorption of pyridine. Preparation of the zeolite catalyst with aluminium hydroxide was made by two methods: (1) mixing of powders and (2) combining appropriate pastes. Regardless of the method used for mixing there was no blocking of zeolite channels by aluminum oxide. The method of mixing zeolite with aluminium hydroxide powders promotes migration of aluminum from aluminum hydroxide/oxide to the zeolite framework. The results of n-hexane conversion showed that with Ni,H/ZSM-5 a slightly lower conversion than with H/ZSM-5 catalyst was observed that can be explained by a reduced yield of cracking products. Ni,H/ZSM-5–Al2O3 (1 : 1) catalytic systems were insignificantly less efficient in n-hexane transformation than alumina free samples but at the same time they were less selective towards hydrocarbons with boiling temperatures higher than this of n-hexane, precursors of carbonaceous deposits.

Characteristics of castables incorporating highly porous alumina aggregates fabricated by high-temperature evaporation method

Porous alumina aggregates were prepared for use in adiabatic refractories via a high-temperature evaporation method. The mechanical and thermal characteristics of the porous alumina bodies and of castable refractories made using the alumina as an aggregate were investigated. Specimens were produced by adding boron hydroxide, sodium carbonate and water glass to aluminum hydroxide powder compacts in varying proportions, followed by heating at 1700 °C for 1 h in a reducing atmosphere to form porous alumina bodies. During heating, these additives formed a Na 2 O-B 2 O 3 -SiO 2 liquid glass phase that promoted the growth of alumina platelets. These platelets subsequently formed a “house of cards” structure. The porosity and compressive strength of the resulting porous alumina were 69.8% and 1.8 MPa, while the thermal conductivity of this material was 0.23 W m −1 ·K −1 at 1000 °C. A castable incorporating the porous alumina aggregate exhibited improved mechanical strength, higher heat resistance and greater FeO corrosion resistance than a sample made using a CA 6 (CaO∙6Al 2 O 3 ) aggregate. The porous alumina castable exhibited similar thermal conductivity to that of the CA6 castable at high temperatures, with a value of 0.85 W m −1 ·K −1 at 1400 °C. Hence, the porous alumina aggregate fabricated in this study can be expected to have practical applications.

THERMAL CONDUCTIVITY OF COMPOSITIONS BASED ON A SILOXANE BINDER WITH A HIGH FILLER CONTENT OF ALUMINUM HYDROXIDE POWDER

The use of aluminum hydroxide as a filler in composite materials makes them non-flammable. When the thermal conductivity of such compositions is above 1 W/(m-K), they can be used as heat-conducting insulating and non-flammable coatings in power electronics. Thermal conductivity of compositions based on dimethylsiloxane with a filler made from aluminum hydroxide powders of various dissipation is studied in the temperature range from 25 °C to 200 °C, depending on the volume content of the filler. With a volumetric content of filler up to 60%, no significant differences in the values of the thermal conductivity of samples with powders of the investigated fractional groups were detected. With volumetric content of the filler more than 40%, the thermal conductivity of the composition at room temperature exceeded 1 W/(m-K). It is shown that the Burger formula modified by the authors turned out to be sufficiently universal for the calculated estimates of the thermal conductivity of materials with different fillers in a wide range of their volume contents.

Characterization of porous alumina bodies fabricated by high-temperature evaporation of boric acid with sodium impurity

For steel-making refractories, porous alumina bodies fabricated by the evaporation of chemical impurities at high temperatures was studied. Boron hydroxide and sodium carbonate were added in different proportions as impurities into the starting aluminum hydroxide powder compacts, which were heated at various temperatures for 1h to form porous alumina bodies. During heating, the borate compounds that reacted with sodium seems to be formed in the liquid phase, so that all alumina particles were able to grow into platelets. Although the sodium inside the compacts was completely evaporated by 1400°C, the boron melt was maintained above 1400°C. Hence, alumina platelets grew with a card-house structure, which preserved the high porosity of the alumina body. After heating at 1600°C for 1h, the remaining boron oxide was completely evaporated and sintering between the alumina particles began to decrease the porosity. The compressive strength and porosity of the alumina bodies obtained by heating at 1700°C for 1h were 0.8MPa and 64%, respectively. It is expected that the resulting porous alumina bodies can be used as castable porous clinkers.

Intercalated hydrotalcite‐like materials and their application as thermal stabilizers in poly(vinyl chloride)

ABSTRACTThe preparation of hydrotalcites with traditional materials is often based on the corresponding salts and alkali solutions. In this study, to facilitate industrial synthesis and take advantage of the lower cost during the process, a Ca–Al–HPO3–layered double hydroxide (LDH) was directly synthesized with calcium hydroxide, aluminum hydroxide, and sodium phosphite powders. X‐ray diffraction, Fourier transform infrared, and scanning electron microscopy analyses confirmed the successful synthesis of the phosphite‐intercalated hydrotalcite. Compared with Ca–Al–CO3–LDH, Ca–Al–HPO3–LDH enhanced the heat stability of poly(vinyl chloride) (PVC) in terms of both short‐term and long‐term stability because phosphite replaced the allyl chloride and reacted with the conjugated double bonds in PVC; this was deduced through a thermal aging test. The composites of Ca–Al–HPO3–LDH, zinc stearate, and calcium stearate had a synergetic effect when added to PVC and exhibited excellent thermal stability. In addition, the phosphite reacted with ZnCl2 in case of the phenomenon of zinc burning. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44896.

Investigation on Effect of Aluminium Hydroxide on Mechanical and Fire Retardant Properties of GFRP- Hybrid Composites

There is currently widespread attention in the usage of organic and inorganic filler materials as modifier for polymers due to the significant vary in the performance attainable with very small percentage of additives. The present work is stirred to investigate the effect of aluminium hydroxide on mechanical and fire retardant properties of GFRP- hybrid composites. Three types of composites are fabricated using 0, 3 and 6 wt.% aluminium hydroxide powder with 50 wt.% fibre, remaining matrix material. The composite laminates are fabricated by hand-layup process. Specimens cut and tested according to ASTM standards for mechanical properties and FMVSS standard for fire retardant properties (burning rate).